From 9f474397767a1539b4a781bd12ef29043adadbbd Mon Sep 17 00:00:00 2001
From: timelyportfolio <kent.russell@timelyportfolio.com>
Date: Sun, 19 Sep 2021 14:14:03 -0500
Subject: [PATCH] update pkgdown

---
 DESCRIPTION                                   |     2 +-
 NEWS.md                                       |     4 +
 docs/404.html                                 |    13 +-
 docs/CONDUCT.html                             |    13 +-
 docs/LICENSE-text.html                        |    13 +-
 docs/articles/index.html                      |    13 +-
 docs/articles/sunburst-2-0-0.html             |    98 +-
 .../sunburst-2-0-0_files/d2b-1.0.9/d2b.min.js |     2 +-
 .../header-attrs-2.10/header-attrs.js         |    12 +
 .../htmlwidgets-1.5.4/htmlwidgets.js          |   903 ++
 .../sunburst-binding-2.1.6/sunburst.js        | 10666 ++++++++++++++++
 .../sund2b-binding-2.1.6/sund2b.js            |   133 +
 docs/authors.html                             |    13 +-
 docs/index.html                               |    14 +-
 docs/news/index.html                          |    32 +-
 docs/pkgdown.css                              |     4 +-
 docs/pkgdown.yml                              |     6 +-
 docs/reference/Rplot001.png                   |   Bin 0 -> 1011 bytes
 docs/reference/add_shiny.html                 |   118 +-
 docs/reference/d2b-shiny.html                 |    24 +-
 docs/reference/index.html                     |    13 +-
 docs/reference/sunburst-shiny.html            |    24 +-
 docs/reference/sunburst.html                  |   344 +-
 docs/reference/sund2b.html                    |   133 +-
 docs/reference/sund2bBreadcrumb.html          |    66 +-
 docs/reference/sund2bTooltip.html             |    54 +-
 26 files changed, 12234 insertions(+), 483 deletions(-)
 create mode 100644 docs/articles/sunburst-2-0-0_files/header-attrs-2.10/header-attrs.js
 create mode 100644 docs/articles/sunburst-2-0-0_files/htmlwidgets-1.5.4/htmlwidgets.js
 create mode 100644 docs/articles/sunburst-2-0-0_files/sunburst-binding-2.1.6/sunburst.js
 create mode 100644 docs/articles/sunburst-2-0-0_files/sund2b-binding-2.1.6/sund2b.js
 create mode 100644 docs/reference/Rplot001.png

diff --git a/DESCRIPTION b/DESCRIPTION
index dbc99fe..653b560 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -59,5 +59,5 @@ Suggests:
     rmarkdown
 Enhances:
     treemap
-RoxygenNote: 7.1.1
+RoxygenNote: 7.1.2
 VignetteBuilder: knitr
diff --git a/NEWS.md b/NEWS.md
index e9f58b5..d8d25d8 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,7 @@
+# sunburstR 2.1.6
+
+* add labels for slices based on https://bl.ocks.org/vasturiano/12da9071095fbd4df434e60d52d2d58d
+
 # sunburstR 2.1.5
 
 * fix bug in internal `csv_to_hier` converter; (see [issue 107](https://github.com/timelyportfolio/sunburstR/issues/107))
diff --git a/docs/404.html b/docs/404.html
index 3ebd1f6..48e4de5 100644
--- a/docs/404.html
+++ b/docs/404.html
@@ -8,11 +8,13 @@
 
 <title>Page not found (404) • sunburstR</title>
 
+
 <!-- jquery -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous" />
+
 <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script>
 
 <!-- bootstrap-toc -->
@@ -36,10 +38,12 @@
 
 
 
+
 <meta property="og:title" content="Page not found (404)" />
 
 
 
+
 <!-- mathjax -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
@@ -67,7 +71,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="index.html">sunburstR</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.4</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.6</span>
       </span>
     </div>
 
@@ -75,7 +79,7 @@
       <ul class="nav navbar-nav">
         <li>
   <a href="index.html">
-    <span class="fas fa fas fa-home fa-lg"></span>
+    <span class="fas fa-home fa-lg"></span>
      
   </a>
 </li>
@@ -98,11 +102,10 @@
   <a href="news/index.html">Changelog</a>
 </li>
       </ul>
-      
       <ul class="nav navbar-nav navbar-right">
         <li>
   <a href="https://github.com/timelyportfolio/sunburstR/">
-    <span class="fab fa fab fa-github fa-lg"></span>
+    <span class="fab fa-github fa-lg"></span>
      
   </a>
 </li>
@@ -142,7 +145,7 @@ <h2 data-toc-skip>Contents</h2>
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.5.1.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.6.1.</p>
 </div>
 
       </footer>
diff --git a/docs/CONDUCT.html b/docs/CONDUCT.html
index 5ff5411..9c1356b 100644
--- a/docs/CONDUCT.html
+++ b/docs/CONDUCT.html
@@ -8,11 +8,13 @@
 
 <title>Contributor Code of Conduct • sunburstR</title>
 
+
 <!-- jquery -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous" />
+
 <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script>
 
 <!-- bootstrap-toc -->
@@ -36,10 +38,12 @@
 
 
 
+
 <meta property="og:title" content="Contributor Code of Conduct" />
 
 
 
+
 <!-- mathjax -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
@@ -67,7 +71,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="index.html">sunburstR</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.4</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.6</span>
       </span>
     </div>
 
@@ -75,7 +79,7 @@
       <ul class="nav navbar-nav">
         <li>
   <a href="index.html">
-    <span class="fas fa fas fa-home fa-lg"></span>
+    <span class="fas fa-home fa-lg"></span>
      
   </a>
 </li>
@@ -98,11 +102,10 @@
   <a href="news/index.html">Changelog</a>
 </li>
       </ul>
-      
       <ul class="nav navbar-nav navbar-right">
         <li>
   <a href="https://github.com/timelyportfolio/sunburstR/">
-    <span class="fab fa fab fa-github fa-lg"></span>
+    <span class="fab fa-github fa-lg"></span>
      
   </a>
 </li>
@@ -150,7 +153,7 @@ <h2 data-toc-skip>Contents</h2>
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.5.1.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.6.1.</p>
 </div>
 
       </footer>
diff --git a/docs/LICENSE-text.html b/docs/LICENSE-text.html
index 3045489..adf48ea 100644
--- a/docs/LICENSE-text.html
+++ b/docs/LICENSE-text.html
@@ -8,11 +8,13 @@
 
 <title>License • sunburstR</title>
 
+
 <!-- jquery -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous" />
+
 <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script>
 
 <!-- bootstrap-toc -->
@@ -36,10 +38,12 @@
 
 
 
+
 <meta property="og:title" content="License" />
 
 
 
+
 <!-- mathjax -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
@@ -67,7 +71,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="index.html">sunburstR</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.4</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.6</span>
       </span>
     </div>
 
@@ -75,7 +79,7 @@
       <ul class="nav navbar-nav">
         <li>
   <a href="index.html">
-    <span class="fas fa fas fa-home fa-lg"></span>
+    <span class="fas fa-home fa-lg"></span>
      
   </a>
 </li>
@@ -98,11 +102,10 @@
   <a href="news/index.html">Changelog</a>
 </li>
       </ul>
-      
       <ul class="nav navbar-nav navbar-right">
         <li>
   <a href="https://github.com/timelyportfolio/sunburstR/">
-    <span class="fab fa fab fa-github fa-lg"></span>
+    <span class="fab fa-github fa-lg"></span>
      
   </a>
 </li>
@@ -144,7 +147,7 @@ <h2 data-toc-skip>Contents</h2>
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.5.1.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.6.1.</p>
 </div>
 
       </footer>
diff --git a/docs/articles/index.html b/docs/articles/index.html
index fe581e3..1f86c86 100644
--- a/docs/articles/index.html
+++ b/docs/articles/index.html
@@ -8,11 +8,13 @@
 
 <title>Articles • sunburstR</title>
 
+
 <!-- jquery -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous" />
+
 <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script>
 
 <!-- bootstrap-toc -->
@@ -36,10 +38,12 @@
 
 
 
+
 <meta property="og:title" content="Articles" />
 
 
 
+
 <!-- mathjax -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
@@ -67,7 +71,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">sunburstR</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.4</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.6</span>
       </span>
     </div>
 
@@ -75,7 +79,7 @@
       <ul class="nav navbar-nav">
         <li>
   <a href="../index.html">
-    <span class="fas fa fas fa-home fa-lg"></span>
+    <span class="fas fa-home fa-lg"></span>
      
   </a>
 </li>
@@ -98,11 +102,10 @@
   <a href="../news/index.html">Changelog</a>
 </li>
       </ul>
-      
       <ul class="nav navbar-nav navbar-right">
         <li>
   <a href="https://github.com/timelyportfolio/sunburstR/">
-    <span class="fab fa fab fa-github fa-lg"></span>
+    <span class="fab fa-github fa-lg"></span>
      
   </a>
 </li>
@@ -141,7 +144,7 @@ <h3>All vignettes</h3>
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.5.1.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.6.1.</p>
 </div>
 
       </footer>
diff --git a/docs/articles/sunburst-2-0-0.html b/docs/articles/sunburst-2-0-0.html
index 3a513e5..bbc3e6d 100644
--- a/docs/articles/sunburst-2-0-0.html
+++ b/docs/articles/sunburst-2-0-0.html
@@ -31,7 +31,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">sunburstR</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.4</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.6</span>
       </span>
     </div>
 
@@ -39,7 +39,7 @@
       <ul class="nav navbar-nav">
 <li>
   <a href="../index.html">
-    <span class="fas fa fas fa-home fa-lg"></span>
+    <span class="fas fa-home fa-lg"></span>
      
   </a>
 </li>
@@ -65,7 +65,7 @@
 <ul class="nav navbar-nav navbar-right">
 <li>
   <a href="https://github.com/timelyportfolio/sunburstR/">
-    <span class="fab fa fab fa-github fa-lg"></span>
+    <span class="fab fa-github fa-lg"></span>
      
   </a>
 </li>
@@ -79,15 +79,15 @@
 
       
 
-      </header><script src="sunburst-2-0-0_files/accessible-code-block-0.0.1/empty-anchor.js"></script><script src="sunburst-2-0-0_files/htmlwidgets-1.5.1.9000/htmlwidgets.js"></script><link href="sunburst-2-0-0_files/sequences-0.1/sequences.css" rel="stylesheet">
-<script src="sunburst-2-0-0_files/sunburst-binding-2.1.4/sunburst.js"></script><script src="sunburst-2-0-0_files/sund2b-binding-2.1.4/sund2b.js"></script><script src="sunburst-2-0-0_files/d3-4.13.0/d3.min.js"></script><link href="sunburst-2-0-0_files/d2b-1.0.9/d2b_custom.css" rel="stylesheet">
+      </header><script src="sunburst-2-0-0_files/header-attrs-2.10/header-attrs.js"></script><script src="sunburst-2-0-0_files/htmlwidgets-1.5.4/htmlwidgets.js"></script><link href="sunburst-2-0-0_files/sequences-0.1/sequences.css" rel="stylesheet">
+<script src="sunburst-2-0-0_files/sunburst-binding-2.1.6/sunburst.js"></script><script src="sunburst-2-0-0_files/sund2b-binding-2.1.6/sund2b.js"></script><script src="sunburst-2-0-0_files/d3-4.13.0/d3.min.js"></script><link href="sunburst-2-0-0_files/d2b-1.0.9/d2b_custom.css" rel="stylesheet">
 <script src="sunburst-2-0-0_files/d2b-1.0.9/d2b.min.js"></script><div class="row">
   <div class="col-md-9 contents">
     <div class="page-header toc-ignore">
       <h1 data-toc-skip>Sunburst 2.0.0</h1>
                         <h4 class="author">Kent Russell</h4>
             
-            <h4 class="date">2020-07-06</h4>
+            <h4 class="date">2021-09-19</h4>
       
       <small class="dont-index">Source: <a href="https://github.com/timelyportfolio/sunburstR/blob/master/vignettes/sunburst-2-0-0.Rmd"><code>vignettes/sunburst-2-0-0.Rmd</code></a></small>
       <div class="hidden name"><code>sunburst-2-0-0.Rmd</code></div>
@@ -101,21 +101,23 @@ <h4 class="date">2020-07-06</h4>
 <h2 class="hasAnchor">
 <a href="#setup-and-data" class="anchor"></a>Setup and Data</h2>
 <p>Let’s get started by loading some packages and making some simple data to use throughout the post.</p>
-<div class="sourceCode" id="cb1"><html><body><pre class="r"><span class="fu"><a href="https://rdrr.io/r/base/library.html">library</a></span>(<span class="no">sunburstR</span>)
-<span class="fu"><a href="https://rdrr.io/r/utils/packageDescription.html">packageVersion</a></span>(<span class="st">"sunburstR"</span>)
-<span class="co">#&gt; [1] '2.1.4'</span></pre></body></html></div>
+<div class="sourceCode" id="cb1"><pre class="downlit sourceCode r">
+<code class="sourceCode R"><span class="kw"><a href="https://rdrr.io/r/base/library.html">library</a></span><span class="op">(</span><span class="va"><a href="https://github.com/timelyportfolio/sunburstR">sunburstR</a></span><span class="op">)</span>
+<span class="fu"><a href="https://rdrr.io/r/utils/packageDescription.html">packageVersion</a></span><span class="op">(</span><span class="st">"sunburstR"</span><span class="op">)</span>
+<span class="co">#&gt; [1] '2.1.6'</span></code></pre></div>
 <p>Simple data should suffice for these examples.</p>
-<div class="sourceCode" id="cb2"><html><body><pre class="r"><span class="fu"><a href="https://rdrr.io/r/base/library.html">library</a></span>(<span class="no">htmltools</span>)
-<span class="fu"><a href="https://rdrr.io/r/base/library.html">library</a></span>(<span class="no">d3r</span>)
+<div class="sourceCode" id="cb2"><pre class="downlit sourceCode r">
+<code class="sourceCode R"><span class="kw"><a href="https://rdrr.io/r/base/library.html">library</a></span><span class="op">(</span><span class="va"><a href="https://github.com/rstudio/htmltools">htmltools</a></span><span class="op">)</span>
+<span class="kw"><a href="https://rdrr.io/r/base/library.html">library</a></span><span class="op">(</span><span class="va"><a href="https://github.com/timelyportfolio/d3r">d3r</a></span><span class="op">)</span>
 
-<span class="no">dat</span> <span class="kw">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/data.frame.html">data.frame</a></span>(
-  <span class="kw">level1</span> <span class="kw">=</span> <span class="fu"><a href="https://rdrr.io/r/base/rep.html">rep</a></span>(<span class="fu"><a href="https://rdrr.io/r/base/c.html">c</a></span>(<span class="st">"a"</span>, <span class="st">"b"</span>), <span class="kw">each</span><span class="kw">=</span><span class="fl">3</span>),
-  <span class="kw">level2</span> <span class="kw">=</span> <span class="fu"><a href="https://rdrr.io/r/base/paste.html">paste0</a></span>(<span class="fu"><a href="https://rdrr.io/r/base/rep.html">rep</a></span>(<span class="fu"><a href="https://rdrr.io/r/base/c.html">c</a></span>(<span class="st">"a"</span>, <span class="st">"b"</span>), <span class="kw">each</span><span class="kw">=</span><span class="fl">3</span>), <span class="fl">1</span>:<span class="fl">3</span>),
-  <span class="kw">size</span> <span class="kw">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html">c</a></span>(<span class="fl">10</span>,<span class="fl">5</span>,<span class="fl">2</span>,<span class="fl">3</span>,<span class="fl">8</span>,<span class="fl">6</span>),
-  <span class="kw">stringsAsFactors</span> <span class="kw">=</span> <span class="fl">FALSE</span>
-)
+<span class="va">dat</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/data.frame.html">data.frame</a></span><span class="op">(</span>
+  level1 <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/rep.html">rep</a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/c.html">c</a></span><span class="op">(</span><span class="st">"a"</span>, <span class="st">"b"</span><span class="op">)</span>, each<span class="op">=</span><span class="fl">3</span><span class="op">)</span>,
+  level2 <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/paste.html">paste0</a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/rep.html">rep</a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/c.html">c</a></span><span class="op">(</span><span class="st">"a"</span>, <span class="st">"b"</span><span class="op">)</span>, each<span class="op">=</span><span class="fl">3</span><span class="op">)</span>, <span class="fl">1</span><span class="op">:</span><span class="fl">3</span><span class="op">)</span>,
+  size <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html">c</a></span><span class="op">(</span><span class="fl">10</span>,<span class="fl">5</span>,<span class="fl">2</span>,<span class="fl">3</span>,<span class="fl">8</span>,<span class="fl">6</span><span class="op">)</span>,
+  stringsAsFactors <span class="op">=</span> <span class="cn">FALSE</span>
+<span class="op">)</span>
 
-<span class="kw pkg">knitr</span><span class="kw ns">::</span><span class="fu"><a href="https://rdrr.io/pkg/knitr/man/kable.html">kable</a></span>(<span class="no">dat</span>)</pre></body></html></div>
+<span class="fu">knitr</span><span class="fu">::</span><span class="fu"><a href="https://rdrr.io/pkg/knitr/man/kable.html">kable</a></span><span class="op">(</span><span class="va">dat</span><span class="op">)</span></code></pre></div>
 <table class="table">
 <thead><tr class="header">
 <th align="left">level1</th>
@@ -156,33 +158,35 @@ <h2 class="hasAnchor">
 </tbody>
 </table>
 <p><a href="https://github.com/timelyportfolio/d3r"><code>d3r</code></a> will help us build our hierarchy.</p>
-<div class="sourceCode" id="cb3"><html><body><pre class="r"><span class="fu"><a href="https://rdrr.io/r/base/library.html">library</a></span>(<span class="no">d3r</span>)
-<span class="no">tree</span> <span class="kw">&lt;-</span> <span class="fu"><a href="https://rdrr.io/pkg/d3r/man/d3_nest.html">d3_nest</a></span>(<span class="no">dat</span>, <span class="kw">value_cols</span> <span class="kw">=</span> <span class="st">"size"</span>)
-<span class="no">tree</span>
-<span class="co">#&gt; {"children":[{"name":"a","children":[{"name":"a1","size":10,"colname":"level2"},{"name":"a2","size":5,"colname":"level2"},{"name":"a3","size":2,"colname":"level2"}],"colname":"level1"},{"name":"b","children":[{"name":"b1","size":3,"colname":"level2"},{"name":"b2","size":8,"colname":"level2"},{"name":"b3","size":6,"colname":"level2"}],"colname":"level1"}],"name":"root"}</span></pre></body></html></div>
+<div class="sourceCode" id="cb3"><pre class="downlit sourceCode r">
+<code class="sourceCode R"><span class="kw"><a href="https://rdrr.io/r/base/library.html">library</a></span><span class="op">(</span><span class="va"><a href="https://github.com/timelyportfolio/d3r">d3r</a></span><span class="op">)</span>
+<span class="va">tree</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/pkg/d3r/man/d3_nest.html">d3_nest</a></span><span class="op">(</span><span class="va">dat</span>, value_cols <span class="op">=</span> <span class="st">"size"</span><span class="op">)</span>
+<span class="va">tree</span>
+<span class="co">#&gt; {"children":[{"name":"a","children":[{"name":"a1","size":10,"colname":"level2"},{"name":"a2","size":5,"colname":"level2"},{"name":"a3","size":2,"colname":"level2"}],"colname":"level1"},{"name":"b","children":[{"name":"b1","size":3,"colname":"level2"},{"name":"b2","size":8,"colname":"level2"},{"name":"b3","size":6,"colname":"level2"}],"colname":"level1"}],"name":"root"}</span></code></pre></div>
 </div>
 <div id="legend-false" class="section level2">
 <h2 class="hasAnchor">
 <a href="#legend-false" class="anchor"></a><code>legend = FALSE</code>
 </h2>
 <p>Often the legend in the sunburst becomes useless with lots of nodes and multiple levels. While a hack could turn it off, I don’t like having to ask users to resort to hacks, so now the argument <code>legend = FALSE</code> will turn it off.</p>
-<div class="sourceCode" id="cb4"><html><body><pre class="r"><span class="no">sb1</span> <span class="kw">&lt;-</span> <span class="fu"><a href="../reference/sunburst.html">sunburst</a></span>(<span class="no">tree</span>, <span class="kw">width</span><span class="kw">=</span><span class="st">"100%"</span>, <span class="kw">height</span><span class="kw">=</span><span class="fl">400</span>)
-<span class="no">sb2</span> <span class="kw">&lt;-</span> <span class="fu"><a href="../reference/sunburst.html">sunburst</a></span>(
-  <span class="no">tree</span>,
-  <span class="kw">legend</span> <span class="kw">=</span> <span class="fl">FALSE</span>,
-  <span class="kw">width</span> <span class="kw">=</span> <span class="st">"100%"</span>,
-  <span class="kw">height</span> <span class="kw">=</span> <span class="fl">400</span>
-)
+<div class="sourceCode" id="cb4"><pre class="downlit sourceCode r">
+<code class="sourceCode R"><span class="va">sb1</span> <span class="op">&lt;-</span> <span class="fu"><a href="../reference/sunburst.html">sunburst</a></span><span class="op">(</span><span class="va">tree</span>, width<span class="op">=</span><span class="st">"100%"</span>, height<span class="op">=</span><span class="fl">400</span><span class="op">)</span>
+<span class="va">sb2</span> <span class="op">&lt;-</span> <span class="fu"><a href="../reference/sunburst.html">sunburst</a></span><span class="op">(</span>
+  <span class="va">tree</span>,
+  legend <span class="op">=</span> <span class="cn">FALSE</span>,
+  width <span class="op">=</span> <span class="st">"100%"</span>,
+  height <span class="op">=</span> <span class="fl">400</span>
+<span class="op">)</span>
 
 <span class="co"># do side-by-side for comparison</span>
-<span class="fu"><a href="https://rdrr.io/pkg/htmltools/man/builder.html">div</a></span>(
-  <span class="kw">style</span><span class="kw">=</span><span class="st">"display: flex; align-items:center;"</span>,
-  <span class="fu"><a href="https://rdrr.io/pkg/htmltools/man/builder.html">div</a></span>(<span class="kw">style</span><span class="kw">=</span><span class="st">"width:50%; border:1px solid #ccc;"</span>, <span class="no">sb1</span>),
-  <span class="fu"><a href="https://rdrr.io/pkg/htmltools/man/builder.html">div</a></span>(<span class="kw">style</span><span class="kw">=</span><span class="st">"width:50%; border:1px solid #ccc;"</span>, <span class="no">sb2</span>)
-)</pre></body></html></div>
+<span class="fu"><a href="https://rdrr.io/pkg/htmltools/man/builder.html">div</a></span><span class="op">(</span>
+  style<span class="op">=</span><span class="st">"display: flex; align-items:center;"</span>,
+  <span class="fu"><a href="https://rdrr.io/pkg/htmltools/man/builder.html">div</a></span><span class="op">(</span>style<span class="op">=</span><span class="st">"width:50%; border:1px solid #ccc;"</span>, <span class="va">sb1</span><span class="op">)</span>,
+  <span class="fu"><a href="https://rdrr.io/pkg/htmltools/man/builder.html">div</a></span><span class="op">(</span>style<span class="op">=</span><span class="st">"width:50%; border:1px solid #ccc;"</span>, <span class="va">sb2</span><span class="op">)</span>
+<span class="op">)</span></code></pre></div>
 <div style="display: flex; align-items:center;">
 <div style="width:50%; border:1px solid #ccc;">
-<div class="sunburst html-widget" id="htmlwidget-c380085cfa0fd4710203" style="width:100%;height:400px; position:relative;">
+<div class="sunburst html-widget" id="htmlwidget-63f866d7dbabe576236f" style="width:100%;height:400px; position:relative;">
 <div>
 <div class="sunburst-main">
 <div class="sunburst-sequence"></div>
@@ -196,10 +200,10 @@ <h2 class="hasAnchor">
 </div>
 </div>
 </div>
-<script type="application/json" data-for="htmlwidget-c380085cfa0fd4710203">{"x":{"data":{"children":[{"name":"a","children":[{"name":"a1","size":10,"colname":"level2"},{"name":"a2","size":5,"colname":"level2"},{"name":"a3","size":2,"colname":"level2"}],"colname":"level1"},{"name":"b","children":[{"name":"b1","size":3,"colname":"level2"},{"name":"b2","size":8,"colname":"level2"},{"name":"b3","size":6,"colname":"level2"}],"colname":"level1"}],"name":"root"},"options":{"legendOrder":null,"colors":null,"valueField":"size","percent":true,"count":false,"explanation":null,"breadcrumb":[],"legend":[],"sortFunction":null,"sumNodes":true}},"evals":[],"jsHooks":[]}</script>
+<script type="application/json" data-for="htmlwidget-63f866d7dbabe576236f">{"x":{"data":{"children":[{"name":"a","children":[{"name":"a1","size":10,"colname":"level2"},{"name":"a2","size":5,"colname":"level2"},{"name":"a3","size":2,"colname":"level2"}],"colname":"level1"},{"name":"b","children":[{"name":"b1","size":3,"colname":"level2"},{"name":"b2","size":8,"colname":"level2"},{"name":"b3","size":6,"colname":"level2"}],"colname":"level1"}],"name":"root"},"options":{"legendOrder":null,"colors":null,"valueField":"size","percent":true,"count":false,"explanation":null,"breadcrumb":[],"legend":[],"sortFunction":null,"sumNodes":true}},"evals":[],"jsHooks":[]}</script>
 </div>
 <div style="width:50%; border:1px solid #ccc;">
-<div class="sunburst html-widget" id="htmlwidget-36ff3d9b69b5d13590d0" style="width:100%;height:400px; position:relative;">
+<div class="sunburst html-widget" id="htmlwidget-ba172955fe4aecf0f383" style="width:100%;height:400px; position:relative;">
 <div>
 <div class="sunburst-main">
 <div class="sunburst-sequence"></div>
@@ -213,7 +217,7 @@ <h2 class="hasAnchor">
 </div>
 </div>
 </div>
-<script type="application/json" data-for="htmlwidget-36ff3d9b69b5d13590d0">{"x":{"data":{"children":[{"name":"a","children":[{"name":"a1","size":10,"colname":"level2"},{"name":"a2","size":5,"colname":"level2"},{"name":"a3","size":2,"colname":"level2"}],"colname":"level1"},{"name":"b","children":[{"name":"b1","size":3,"colname":"level2"},{"name":"b2","size":8,"colname":"level2"},{"name":"b3","size":6,"colname":"level2"}],"colname":"level1"}],"name":"root"},"options":{"legendOrder":null,"colors":null,"valueField":"size","percent":true,"count":false,"explanation":null,"breadcrumb":[],"legend":false,"sortFunction":null,"sumNodes":true}},"evals":[],"jsHooks":[]}</script>
+<script type="application/json" data-for="htmlwidget-ba172955fe4aecf0f383">{"x":{"data":{"children":[{"name":"a","children":[{"name":"a1","size":10,"colname":"level2"},{"name":"a2","size":5,"colname":"level2"},{"name":"a3","size":2,"colname":"level2"}],"colname":"level1"},{"name":"b","children":[{"name":"b1","size":3,"colname":"level2"},{"name":"b2","size":8,"colname":"level2"},{"name":"b3","size":6,"colname":"level2"}],"colname":"level1"}],"name":"root"},"options":{"legendOrder":null,"colors":null,"valueField":"size","percent":true,"count":false,"explanation":null,"breadcrumb":[],"legend":false,"sortFunction":null,"sumNodes":true}},"evals":[],"jsHooks":[]}</script>
 </div>
 </div>
 </div>
@@ -221,15 +225,16 @@ <h2 class="hasAnchor">
 <h2 class="hasAnchor">
 <a href="#d2b-sunburst" class="anchor"></a><code>d2b</code> Sunburst</h2>
 <p>Kevin Warne has built an incredible sunburst in <code>d2b</code>, so I just had to add it to <code>sunburstR</code>. I think Kevin’s work definitely deserves a star on <a href="https://github.com/d2bjs">Github</a>, and with only 32, I encourage a quick detour to share the love.</p>
-<div class="sourceCode" id="cb5"><html><body><pre class="r"><span class="no">sb3</span> <span class="kw">&lt;-</span> <span class="fu"><a href="../reference/sund2b.html">sund2b</a></span>(<span class="no">tree</span>, <span class="kw">width</span><span class="kw">=</span><span class="st">"100%"</span>)
+<div class="sourceCode" id="cb5"><pre class="downlit sourceCode r">
+<code class="sourceCode R"><span class="va">sb3</span> <span class="op">&lt;-</span> <span class="fu"><a href="../reference/sund2b.html">sund2b</a></span><span class="op">(</span><span class="va">tree</span>, width<span class="op">=</span><span class="st">"100%"</span><span class="op">)</span>
 
-<span class="fu"><a href="https://rdrr.io/pkg/htmltools/man/builder.html">div</a></span>(
-  <span class="kw">style</span><span class="kw">=</span><span class="st">"display: flex; align-items:center;"</span>,
-  <span class="no">sb3</span>
-)</pre></body></html></div>
+<span class="fu"><a href="https://rdrr.io/pkg/htmltools/man/builder.html">div</a></span><span class="op">(</span>
+  style<span class="op">=</span><span class="st">"display: flex; align-items:center;"</span>,
+  <span class="va">sb3</span>
+<span class="op">)</span></code></pre></div>
 <div style="display: flex; align-items:center;">
-<div id="htmlwidget-1f1d445c98abb8306464" style="width:100%;height:500px;" class="sund2b html-widget"></div>
-<script type="application/json" data-for="htmlwidget-1f1d445c98abb8306464">{"x":{"data":{"root":{"children":[{"name":"a","children":[{"name":"a1","size":10,"colname":"level2"},{"name":"a2","size":5,"colname":"level2"},{"name":"a3","size":2,"colname":"level2"}],"colname":"level1"},{"name":"b","children":[{"name":"b1","size":3,"colname":"level2"},{"name":"b2","size":8,"colname":"level2"},{"name":"b3","size":6,"colname":"level2"}],"colname":"level1"}],"name":"root"},"tooltip":null,"breadcrumbs":null},"options":{"colors":null,"valueField":"size","rootLabel":null,"showLabels":false}},"evals":[],"jsHooks":[]}</script>
+<div id="htmlwidget-08b46ff31a5fd9bfd702" style="width:100%;height:500px;" class="sund2b html-widget"></div>
+<script type="application/json" data-for="htmlwidget-08b46ff31a5fd9bfd702">{"x":{"data":{"root":{"children":[{"name":"a","children":[{"name":"a1","size":10,"colname":"level2"},{"name":"a2","size":5,"colname":"level2"},{"name":"a3","size":2,"colname":"level2"}],"colname":"level1"},{"name":"b","children":[{"name":"b1","size":3,"colname":"level2"},{"name":"b2","size":8,"colname":"level2"},{"name":"b3","size":6,"colname":"level2"}],"colname":"level1"}],"name":"root"},"tooltip":null,"breadcrumbs":null},"options":{"colors":null,"valueField":"size","rootLabel":null,"showLabels":false}},"evals":[],"jsHooks":[]}</script>
 </div>
 </div>
 <div id="sum-nodes" class="section level2">
@@ -250,6 +255,7 @@ <h2 class="hasAnchor">
   </div>
 
   <div class="col-md-3 hidden-xs hidden-sm" id="pkgdown-sidebar">
+
         <nav id="toc" data-toggle="toc"><h2 data-toc-skip>Contents</h2>
     </nav>
 </div>
@@ -263,7 +269,7 @@ <h2 class="hasAnchor">
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.5.1.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.6.1.</p>
 </div>
 
       </footer>
diff --git a/docs/articles/sunburst-2-0-0_files/d2b-1.0.9/d2b.min.js b/docs/articles/sunburst-2-0-0_files/d2b-1.0.9/d2b.min.js
index 268abc5..dc5a679 100644
--- a/docs/articles/sunburst-2-0-0_files/d2b-1.0.9/d2b.min.js
+++ b/docs/articles/sunburst-2-0-0_files/d2b-1.0.9/d2b.min.js
@@ -1 +1 @@
-var d2b=function(t,N,p,n,i,T,u,s,P,e,f,o,y,a,m,R,L,b){"use strict";!function(t,n){void 0===n&&(n={});var e=n.insertAt;if(t&&"undefined"!=typeof document){var r=document.head||document.getElementsByTagName("head")[0],a=document.createElement("style");a.type="text/css","top"===e&&r.firstChild?r.insertBefore(a,r.firstChild):r.appendChild(a),a.styleSheet?a.styleSheet.cssText=t:a.appendChild(document.createTextNode(t))}}('.d2b-draggable{cursor:move}.d2b-chart-advanced{width:100%;height:100%}.d2b-pie-chart .d2b-pie-arc path{stroke-width:1px;stroke:#fff}.d2b-pie-chart .d2b-pie-arc text{fill:#fff;font-weight:700;pointer-events:none;text-anchor:middle}.d2b-axis-wrapper .d2b-axis-background{opacity:0}.d2b-chart-breadcrumbs{width:200px;padding-left:10px}.d2b-sunburst-breadcrumb .d2b-sunburst-label,.d2b-sunburst-tooltip .d2b-sunburst-label{text-align:center}.d2b-sunburst-breadcrumb .d2b-sunburst-value,.d2b-sunburst-tooltip .d2b-sunburst-value{font-size:14pt;margin-top:5px}.d2b-sunburst-breadcrumb .d2b-sunburst-percent{float:right}.d2b-breadcrumbs:not(.d2b-vertical) .d2b-sunburst-percent{margin-left:30px}.d2b-sunburst-tooltip{text-align:center}.d2b-sunburst-tooltip .d2b-sunburst-percent{display:inline}.d2b-sunburst-tooltip .d2b-sunburst-percent:before{content:"("}.d2b-sunburst-tooltip .d2b-sunburst-percent:after{content:")"}.d2b-sankey-link-arrow{font-size:10px;position:relative;top:-2px}.d2b-line-graph .d2b-line{stroke-width:1.5px;fill:none}.d2b-area-graph .d2b-area{stroke:none;fill-opacity:.3}.d2b-box .d2b-box-center,.d2b-box .d2b-box-dash,.d2b-box .d2b-box-outlier,.d2b-box .d2b-box-rect{stroke-width:1.5px}.d2b-box .d2b-box-rect{fill:#fff;fill-opacity:.3}.d2b-box .d2b-box-center{stroke-dasharray:3 3}.d2b-box .d2b-box-label{fill:#555;font-size:10pt}.d2b-box .d2b-box-outlier{fill:none;stroke-opacity:.4}.d2b-bar-graph .d2b-bar-group rect{opacity:.8}.d2b-bubble-pack-graph .d2b-bubble-point{opacity:.75}.d2b-bubble-pack-graph .d2b-bubble-indicator rect{fill-opacity:.25;stroke-opacity:.9;cursor:pointer;stroke-width:1px}.d2b-bubble-pack-graph .d2b-bubble-indicator rect:hover{stroke-width:2px}.d2b-bubble-pack-graph .d2b-bubble-indicator path,.d2b-bubble-pack-graph .d2b-bubble-indicator text{pointer-events:none}.d2b-plane text{font-size:10pt}.d2b-plane .d2b-y2-axis .d2b-axis-label,.d2b-plane .d2b-y-axis .d2b-axis-label{-webkit-transform:rotate(-90deg);transform:rotate(-90deg)}.d2b-plane .d2b-y2-axis .tick line,.d2b-plane .d2b-y-axis .tick line{stroke-width:.6px}.d2b-plane .d2b-grid .tick line{shape-rendering:crispEdges;stroke-width:.5px;stroke-opacity:.15}.d2b-plane .d2b-grid .tick text{display:none}.d2b-plane .d2b-axis-label{fill:#000;font-weight:700}.d2b-plane path.domain{stroke-width:.4px;stroke-opacity:.4}.d2b-sunburst-arc{transition:opacity .2s,stroke-width .2s;cursor:pointer;opacity:.9;stroke-width:.8px;stroke:#fff}.d2b-sunburst-arc.d2b-transparent{fill-opacity:.2}.d2b-sunburst-label{font-size:8pt;fill-opacity:.8;pointer-events:none;font-family:arial}.d2b-sunburst-label.d2b-transparent{fill-opacity:.2}.d2b-sunburst-center{fill-opacity:0;stroke:none;cursor:pointer}.d2b-sunburst-ancestor{opacity:.4}.d2b-sankey-links path{fill:none}.d2b-sankey-links path,.d2b-sankey-links rect{opacity:.4}.d2b-sankey-links path:hover,.d2b-sankey-links rect:hover{opacity:.6}.d2b-sankey-nodes rect{stroke-width:.3px;stroke:#000;opacity:.6}.d2b-sankey-nodes rect:hover{opacity:.8}.d2b-text-anchor-end{text-anchor:end}.d2b-tooltip{pointer-events:none;background:#fff;border:1px solid #bbb;border-radius:2px;position:fixed;box-shadow:0 0 2px #ccc;margin:0}.d2b-tooltip:before{left:0;top:0;position:absolute;z-index:2;content:""}.d2b-tooltip-content{white-space:nowrap;padding:6px 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diff --git a/docs/articles/sunburst-2-0-0_files/header-attrs-2.10/header-attrs.js b/docs/articles/sunburst-2-0-0_files/header-attrs-2.10/header-attrs.js
new file mode 100644
index 0000000..dd57d92
--- /dev/null
+++ b/docs/articles/sunburst-2-0-0_files/header-attrs-2.10/header-attrs.js
@@ -0,0 +1,12 @@
+// Pandoc 2.9 adds attributes on both header and div. We remove the former (to
+// be compatible with the behavior of Pandoc < 2.8).
+document.addEventListener('DOMContentLoaded', function(e) {
+  var hs = document.querySelectorAll("div.section[class*='level'] > :first-child");
+  var i, h, a;
+  for (i = 0; i < hs.length; i++) {
+    h = hs[i];
+    if (!/^h[1-6]$/i.test(h.tagName)) continue;  // it should be a header h1-h6
+    a = h.attributes;
+    while (a.length > 0) h.removeAttribute(a[0].name);
+  }
+});
diff --git a/docs/articles/sunburst-2-0-0_files/htmlwidgets-1.5.4/htmlwidgets.js b/docs/articles/sunburst-2-0-0_files/htmlwidgets-1.5.4/htmlwidgets.js
new file mode 100644
index 0000000..da8b236
--- /dev/null
+++ b/docs/articles/sunburst-2-0-0_files/htmlwidgets-1.5.4/htmlwidgets.js
@@ -0,0 +1,903 @@
+(function() {
+  // If window.HTMLWidgets is already defined, then use it; otherwise create a
+  // new object. This allows preceding code to set options that affect the
+  // initialization process (though none currently exist).
+  window.HTMLWidgets = window.HTMLWidgets || {};
+
+  // See if we're running in a viewer pane. If not, we're in a web browser.
+  var viewerMode = window.HTMLWidgets.viewerMode =
+      /\bviewer_pane=1\b/.test(window.location);
+
+  // See if we're running in Shiny mode. If not, it's a static document.
+  // Note that static widgets can appear in both Shiny and static modes, but
+  // obviously, Shiny widgets can only appear in Shiny apps/documents.
+  var shinyMode = window.HTMLWidgets.shinyMode =
+      typeof(window.Shiny) !== "undefined" && !!window.Shiny.outputBindings;
+
+  // We can't count on jQuery being available, so we implement our own
+  // version if necessary.
+  function querySelectorAll(scope, selector) {
+    if (typeof(jQuery) !== "undefined" && scope instanceof jQuery) {
+      return scope.find(selector);
+    }
+    if (scope.querySelectorAll) {
+      return scope.querySelectorAll(selector);
+    }
+  }
+
+  function asArray(value) {
+    if (value === null)
+      return [];
+    if ($.isArray(value))
+      return value;
+    return [value];
+  }
+
+  // Implement jQuery's extend
+  function extend(target /*, ... */) {
+    if (arguments.length == 1) {
+      return target;
+    }
+    for (var i = 1; i < arguments.length; i++) {
+      var source = arguments[i];
+      for (var prop in source) {
+        if (source.hasOwnProperty(prop)) {
+          target[prop] = source[prop];
+        }
+      }
+    }
+    return target;
+  }
+
+  // IE8 doesn't support Array.forEach.
+  function forEach(values, callback, thisArg) {
+    if (values.forEach) {
+      values.forEach(callback, thisArg);
+    } else {
+      for (var i = 0; i < values.length; i++) {
+        callback.call(thisArg, values[i], i, values);
+      }
+    }
+  }
+
+  // Replaces the specified method with the return value of funcSource.
+  //
+  // Note that funcSource should not BE the new method, it should be a function
+  // that RETURNS the new method. funcSource receives a single argument that is
+  // the overridden method, it can be called from the new method. The overridden
+  // method can be called like a regular function, it has the target permanently
+  // bound to it so "this" will work correctly.
+  function overrideMethod(target, methodName, funcSource) {
+    var superFunc = target[methodName] || function() {};
+    var superFuncBound = function() {
+      return superFunc.apply(target, arguments);
+    };
+    target[methodName] = funcSource(superFuncBound);
+  }
+
+  // Add a method to delegator that, when invoked, calls
+  // delegatee.methodName. If there is no such method on
+  // the delegatee, but there was one on delegator before
+  // delegateMethod was called, then the original version
+  // is invoked instead.
+  // For example:
+  //
+  // var a = {
+  //   method1: function() { console.log('a1'); }
+  //   method2: function() { console.log('a2'); }
+  // };
+  // var b = {
+  //   method1: function() { console.log('b1'); }
+  // };
+  // delegateMethod(a, b, "method1");
+  // delegateMethod(a, b, "method2");
+  // a.method1();
+  // a.method2();
+  //
+  // The output would be "b1", "a2".
+  function delegateMethod(delegator, delegatee, methodName) {
+    var inherited = delegator[methodName];
+    delegator[methodName] = function() {
+      var target = delegatee;
+      var method = delegatee[methodName];
+
+      // The method doesn't exist on the delegatee. Instead,
+      // call the method on the delegator, if it exists.
+      if (!method) {
+        target = delegator;
+        method = inherited;
+      }
+
+      if (method) {
+        return method.apply(target, arguments);
+      }
+    };
+  }
+
+  // Implement a vague facsimilie of jQuery's data method
+  function elementData(el, name, value) {
+    if (arguments.length == 2) {
+      return el["htmlwidget_data_" + name];
+    } else if (arguments.length == 3) {
+      el["htmlwidget_data_" + name] = value;
+      return el;
+    } else {
+      throw new Error("Wrong number of arguments for elementData: " +
+        arguments.length);
+    }
+  }
+
+  // http://stackoverflow.com/questions/3446170/escape-string-for-use-in-javascript-regex
+  function escapeRegExp(str) {
+    return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
+  }
+
+  function hasClass(el, className) {
+    var re = new RegExp("\\b" + escapeRegExp(className) + "\\b");
+    return re.test(el.className);
+  }
+
+  // elements - array (or array-like object) of HTML elements
+  // className - class name to test for
+  // include - if true, only return elements with given className;
+  //   if false, only return elements *without* given className
+  function filterByClass(elements, className, include) {
+    var results = [];
+    for (var i = 0; i < elements.length; i++) {
+      if (hasClass(elements[i], className) == include)
+        results.push(elements[i]);
+    }
+    return results;
+  }
+
+  function on(obj, eventName, func) {
+    if (obj.addEventListener) {
+      obj.addEventListener(eventName, func, false);
+    } else if (obj.attachEvent) {
+      obj.attachEvent(eventName, func);
+    }
+  }
+
+  function off(obj, eventName, func) {
+    if (obj.removeEventListener)
+      obj.removeEventListener(eventName, func, false);
+    else if (obj.detachEvent) {
+      obj.detachEvent(eventName, func);
+    }
+  }
+
+  // Translate array of values to top/right/bottom/left, as usual with
+  // the "padding" CSS property
+  // https://developer.mozilla.org/en-US/docs/Web/CSS/padding
+  function unpackPadding(value) {
+    if (typeof(value) === "number")
+      value = [value];
+    if (value.length === 1) {
+      return {top: value[0], right: value[0], bottom: value[0], left: value[0]};
+    }
+    if (value.length === 2) {
+      return {top: value[0], right: value[1], bottom: value[0], left: value[1]};
+    }
+    if (value.length === 3) {
+      return {top: value[0], right: value[1], bottom: value[2], left: value[1]};
+    }
+    if (value.length === 4) {
+      return {top: value[0], right: value[1], bottom: value[2], left: value[3]};
+    }
+  }
+
+  // Convert an unpacked padding object to a CSS value
+  function paddingToCss(paddingObj) {
+    return paddingObj.top + "px " + paddingObj.right + "px " + paddingObj.bottom + "px " + paddingObj.left + "px";
+  }
+
+  // Makes a number suitable for CSS
+  function px(x) {
+    if (typeof(x) === "number")
+      return x + "px";
+    else
+      return x;
+  }
+
+  // Retrieves runtime widget sizing information for an element.
+  // The return value is either null, or an object with fill, padding,
+  // defaultWidth, defaultHeight fields.
+  function sizingPolicy(el) {
+    var sizingEl = document.querySelector("script[data-for='" + el.id + "'][type='application/htmlwidget-sizing']");
+    if (!sizingEl)
+      return null;
+    var sp = JSON.parse(sizingEl.textContent || sizingEl.text || "{}");
+    if (viewerMode) {
+      return sp.viewer;
+    } else {
+      return sp.browser;
+    }
+  }
+
+  // @param tasks Array of strings (or falsy value, in which case no-op).
+  //   Each element must be a valid JavaScript expression that yields a
+  //   function. Or, can be an array of objects with "code" and "data"
+  //   properties; in this case, the "code" property should be a string
+  //   of JS that's an expr that yields a function, and "data" should be
+  //   an object that will be added as an additional argument when that
+  //   function is called.
+  // @param target The object that will be "this" for each function
+  //   execution.
+  // @param args Array of arguments to be passed to the functions. (The
+  //   same arguments will be passed to all functions.)
+  function evalAndRun(tasks, target, args) {
+    if (tasks) {
+      forEach(tasks, function(task) {
+        var theseArgs = args;
+        if (typeof(task) === "object") {
+          theseArgs = theseArgs.concat([task.data]);
+          task = task.code;
+        }
+        var taskFunc = tryEval(task);
+        if (typeof(taskFunc) !== "function") {
+          throw new Error("Task must be a function! Source:\n" + task);
+        }
+        taskFunc.apply(target, theseArgs);
+      });
+    }
+  }
+
+  // Attempt eval() both with and without enclosing in parentheses.
+  // Note that enclosing coerces a function declaration into
+  // an expression that eval() can parse
+  // (otherwise, a SyntaxError is thrown)
+  function tryEval(code) {
+    var result = null;
+    try {
+      result = eval("(" + code + ")");
+    } catch(error) {
+      if (!(error instanceof SyntaxError)) {
+        throw error;
+      }
+      try {
+        result = eval(code);
+      } catch(e) {
+        if (e instanceof SyntaxError) {
+          throw error;
+        } else {
+          throw e;
+        }
+      }
+    }
+    return result;
+  }
+
+  function initSizing(el) {
+    var sizing = sizingPolicy(el);
+    if (!sizing)
+      return;
+
+    var cel = document.getElementById("htmlwidget_container");
+    if (!cel)
+      return;
+
+    if (typeof(sizing.padding) !== "undefined") {
+      document.body.style.margin = "0";
+      document.body.style.padding = paddingToCss(unpackPadding(sizing.padding));
+    }
+
+    if (sizing.fill) {
+      document.body.style.overflow = "hidden";
+      document.body.style.width = "100%";
+      document.body.style.height = "100%";
+      document.documentElement.style.width = "100%";
+      document.documentElement.style.height = "100%";
+      if (cel) {
+        cel.style.position = "absolute";
+        var pad = unpackPadding(sizing.padding);
+        cel.style.top = pad.top + "px";
+        cel.style.right = pad.right + "px";
+        cel.style.bottom = pad.bottom + "px";
+        cel.style.left = pad.left + "px";
+        el.style.width = "100%";
+        el.style.height = "100%";
+      }
+
+      return {
+        getWidth: function() { return cel.offsetWidth; },
+        getHeight: function() { return cel.offsetHeight; }
+      };
+
+    } else {
+      el.style.width = px(sizing.width);
+      el.style.height = px(sizing.height);
+
+      return {
+        getWidth: function() { return el.offsetWidth; },
+        getHeight: function() { return el.offsetHeight; }
+      };
+    }
+  }
+
+  // Default implementations for methods
+  var defaults = {
+    find: function(scope) {
+      return querySelectorAll(scope, "." + this.name);
+    },
+    renderError: function(el, err) {
+      var $el = $(el);
+
+      this.clearError(el);
+
+      // Add all these error classes, as Shiny does
+      var errClass = "shiny-output-error";
+      if (err.type !== null) {
+        // use the classes of the error condition as CSS class names
+        errClass = errClass + " " + $.map(asArray(err.type), function(type) {
+          return errClass + "-" + type;
+        }).join(" ");
+      }
+      errClass = errClass + " htmlwidgets-error";
+
+      // Is el inline or block? If inline or inline-block, just display:none it
+      // and add an inline error.
+      var display = $el.css("display");
+      $el.data("restore-display-mode", display);
+
+      if (display === "inline" || display === "inline-block") {
+        $el.hide();
+        if (err.message !== "") {
+          var errorSpan = $("<span>").addClass(errClass);
+          errorSpan.text(err.message);
+          $el.after(errorSpan);
+        }
+      } else if (display === "block") {
+        // If block, add an error just after the el, set visibility:none on the
+        // el, and position the error to be on top of the el.
+        // Mark it with a unique ID and CSS class so we can remove it later.
+        $el.css("visibility", "hidden");
+        if (err.message !== "") {
+          var errorDiv = $("<div>").addClass(errClass).css("position", "absolute")
+            .css("top", el.offsetTop)
+            .css("left", el.offsetLeft)
+            // setting width can push out the page size, forcing otherwise
+            // unnecessary scrollbars to appear and making it impossible for
+            // the element to shrink; so use max-width instead
+            .css("maxWidth", el.offsetWidth)
+            .css("height", el.offsetHeight);
+          errorDiv.text(err.message);
+          $el.after(errorDiv);
+
+          // Really dumb way to keep the size/position of the error in sync with
+          // the parent element as the window is resized or whatever.
+          var intId = setInterval(function() {
+            if (!errorDiv[0].parentElement) {
+              clearInterval(intId);
+              return;
+            }
+            errorDiv
+              .css("top", el.offsetTop)
+              .css("left", el.offsetLeft)
+              .css("maxWidth", el.offsetWidth)
+              .css("height", el.offsetHeight);
+          }, 500);
+        }
+      }
+    },
+    clearError: function(el) {
+      var $el = $(el);
+      var display = $el.data("restore-display-mode");
+      $el.data("restore-display-mode", null);
+
+      if (display === "inline" || display === "inline-block") {
+        if (display)
+          $el.css("display", display);
+        $(el.nextSibling).filter(".htmlwidgets-error").remove();
+      } else if (display === "block"){
+        $el.css("visibility", "inherit");
+        $(el.nextSibling).filter(".htmlwidgets-error").remove();
+      }
+    },
+    sizing: {}
+  };
+
+  // Called by widget bindings to register a new type of widget. The definition
+  // object can contain the following properties:
+  // - name (required) - A string indicating the binding name, which will be
+  //   used by default as the CSS classname to look for.
+  // - initialize (optional) - A function(el) that will be called once per
+  //   widget element; if a value is returned, it will be passed as the third
+  //   value to renderValue.
+  // - renderValue (required) - A function(el, data, initValue) that will be
+  //   called with data. Static contexts will cause this to be called once per
+  //   element; Shiny apps will cause this to be called multiple times per
+  //   element, as the data changes.
+  window.HTMLWidgets.widget = function(definition) {
+    if (!definition.name) {
+      throw new Error("Widget must have a name");
+    }
+    if (!definition.type) {
+      throw new Error("Widget must have a type");
+    }
+    // Currently we only support output widgets
+    if (definition.type !== "output") {
+      throw new Error("Unrecognized widget type '" + definition.type + "'");
+    }
+    // TODO: Verify that .name is a valid CSS classname
+
+    // Support new-style instance-bound definitions. Old-style class-bound
+    // definitions have one widget "object" per widget per type/class of
+    // widget; the renderValue and resize methods on such widget objects
+    // take el and instance arguments, because the widget object can't
+    // store them. New-style instance-bound definitions have one widget
+    // object per widget instance; the definition that's passed in doesn't
+    // provide renderValue or resize methods at all, just the single method
+    //   factory(el, width, height)
+    // which returns an object that has renderValue(x) and resize(w, h).
+    // This enables a far more natural programming style for the widget
+    // author, who can store per-instance state using either OO-style
+    // instance fields or functional-style closure variables (I guess this
+    // is in contrast to what can only be called C-style pseudo-OO which is
+    // what we required before).
+    if (definition.factory) {
+      definition = createLegacyDefinitionAdapter(definition);
+    }
+
+    if (!definition.renderValue) {
+      throw new Error("Widget must have a renderValue function");
+    }
+
+    // For static rendering (non-Shiny), use a simple widget registration
+    // scheme. We also use this scheme for Shiny apps/documents that also
+    // contain static widgets.
+    window.HTMLWidgets.widgets = window.HTMLWidgets.widgets || [];
+    // Merge defaults into the definition; don't mutate the original definition.
+    var staticBinding = extend({}, defaults, definition);
+    overrideMethod(staticBinding, "find", function(superfunc) {
+      return function(scope) {
+        var results = superfunc(scope);
+        // Filter out Shiny outputs, we only want the static kind
+        return filterByClass(results, "html-widget-output", false);
+      };
+    });
+    window.HTMLWidgets.widgets.push(staticBinding);
+
+    if (shinyMode) {
+      // Shiny is running. Register the definition with an output binding.
+      // The definition itself will not be the output binding, instead
+      // we will make an output binding object that delegates to the
+      // definition. This is because we foolishly used the same method
+      // name (renderValue) for htmlwidgets definition and Shiny bindings
+      // but they actually have quite different semantics (the Shiny
+      // bindings receive data that includes lots of metadata that it
+      // strips off before calling htmlwidgets renderValue). We can't
+      // just ignore the difference because in some widgets it's helpful
+      // to call this.renderValue() from inside of resize(), and if
+      // we're not delegating, then that call will go to the Shiny
+      // version instead of the htmlwidgets version.
+
+      // Merge defaults with definition, without mutating either.
+      var bindingDef = extend({}, defaults, definition);
+
+      // This object will be our actual Shiny binding.
+      var shinyBinding = new Shiny.OutputBinding();
+
+      // With a few exceptions, we'll want to simply use the bindingDef's
+      // version of methods if they are available, otherwise fall back to
+      // Shiny's defaults. NOTE: If Shiny's output bindings gain additional
+      // methods in the future, and we want them to be overrideable by
+      // HTMLWidget binding definitions, then we'll need to add them to this
+      // list.
+      delegateMethod(shinyBinding, bindingDef, "getId");
+      delegateMethod(shinyBinding, bindingDef, "onValueChange");
+      delegateMethod(shinyBinding, bindingDef, "onValueError");
+      delegateMethod(shinyBinding, bindingDef, "renderError");
+      delegateMethod(shinyBinding, bindingDef, "clearError");
+      delegateMethod(shinyBinding, bindingDef, "showProgress");
+
+      // The find, renderValue, and resize are handled differently, because we
+      // want to actually decorate the behavior of the bindingDef methods.
+
+      shinyBinding.find = function(scope) {
+        var results = bindingDef.find(scope);
+
+        // Only return elements that are Shiny outputs, not static ones
+        var dynamicResults = results.filter(".html-widget-output");
+
+        // It's possible that whatever caused Shiny to think there might be
+        // new dynamic outputs, also caused there to be new static outputs.
+        // Since there might be lots of different htmlwidgets bindings, we
+        // schedule execution for later--no need to staticRender multiple
+        // times.
+        if (results.length !== dynamicResults.length)
+          scheduleStaticRender();
+
+        return dynamicResults;
+      };
+
+      // Wrap renderValue to handle initialization, which unfortunately isn't
+      // supported natively by Shiny at the time of this writing.
+
+      shinyBinding.renderValue = function(el, data) {
+        Shiny.renderDependencies(data.deps);
+        // Resolve strings marked as javascript literals to objects
+        if (!(data.evals instanceof Array)) data.evals = [data.evals];
+        for (var i = 0; data.evals && i < data.evals.length; i++) {
+          window.HTMLWidgets.evaluateStringMember(data.x, data.evals[i]);
+        }
+        if (!bindingDef.renderOnNullValue) {
+          if (data.x === null) {
+            el.style.visibility = "hidden";
+            return;
+          } else {
+            el.style.visibility = "inherit";
+          }
+        }
+        if (!elementData(el, "initialized")) {
+          initSizing(el);
+
+          elementData(el, "initialized", true);
+          if (bindingDef.initialize) {
+            var result = bindingDef.initialize(el, el.offsetWidth,
+              el.offsetHeight);
+            elementData(el, "init_result", result);
+          }
+        }
+        bindingDef.renderValue(el, data.x, elementData(el, "init_result"));
+        evalAndRun(data.jsHooks.render, elementData(el, "init_result"), [el, data.x]);
+      };
+
+      // Only override resize if bindingDef implements it
+      if (bindingDef.resize) {
+        shinyBinding.resize = function(el, width, height) {
+          // Shiny can call resize before initialize/renderValue have been
+          // called, which doesn't make sense for widgets.
+          if (elementData(el, "initialized")) {
+            bindingDef.resize(el, width, height, elementData(el, "init_result"));
+          }
+        };
+      }
+
+      Shiny.outputBindings.register(shinyBinding, bindingDef.name);
+    }
+  };
+
+  var scheduleStaticRenderTimerId = null;
+  function scheduleStaticRender() {
+    if (!scheduleStaticRenderTimerId) {
+      scheduleStaticRenderTimerId = setTimeout(function() {
+        scheduleStaticRenderTimerId = null;
+        window.HTMLWidgets.staticRender();
+      }, 1);
+    }
+  }
+
+  // Render static widgets after the document finishes loading
+  // Statically render all elements that are of this widget's class
+  window.HTMLWidgets.staticRender = function() {
+    var bindings = window.HTMLWidgets.widgets || [];
+    forEach(bindings, function(binding) {
+      var matches = binding.find(document.documentElement);
+      forEach(matches, function(el) {
+        var sizeObj = initSizing(el, binding);
+
+        if (hasClass(el, "html-widget-static-bound"))
+          return;
+        el.className = el.className + " html-widget-static-bound";
+
+        var initResult;
+        if (binding.initialize) {
+          initResult = binding.initialize(el,
+            sizeObj ? sizeObj.getWidth() : el.offsetWidth,
+            sizeObj ? sizeObj.getHeight() : el.offsetHeight
+          );
+          elementData(el, "init_result", initResult);
+        }
+
+        if (binding.resize) {
+          var lastSize = {
+            w: sizeObj ? sizeObj.getWidth() : el.offsetWidth,
+            h: sizeObj ? sizeObj.getHeight() : el.offsetHeight
+          };
+          var resizeHandler = function(e) {
+            var size = {
+              w: sizeObj ? sizeObj.getWidth() : el.offsetWidth,
+              h: sizeObj ? sizeObj.getHeight() : el.offsetHeight
+            };
+            if (size.w === 0 && size.h === 0)
+              return;
+            if (size.w === lastSize.w && size.h === lastSize.h)
+              return;
+            lastSize = size;
+            binding.resize(el, size.w, size.h, initResult);
+          };
+
+          on(window, "resize", resizeHandler);
+
+          // This is needed for cases where we're running in a Shiny
+          // app, but the widget itself is not a Shiny output, but
+          // rather a simple static widget. One example of this is
+          // an rmarkdown document that has runtime:shiny and widget
+          // that isn't in a render function. Shiny only knows to
+          // call resize handlers for Shiny outputs, not for static
+          // widgets, so we do it ourselves.
+          if (window.jQuery) {
+            window.jQuery(document).on(
+              "shown.htmlwidgets shown.bs.tab.htmlwidgets shown.bs.collapse.htmlwidgets",
+              resizeHandler
+            );
+            window.jQuery(document).on(
+              "hidden.htmlwidgets hidden.bs.tab.htmlwidgets hidden.bs.collapse.htmlwidgets",
+              resizeHandler
+            );
+          }
+
+          // This is needed for the specific case of ioslides, which
+          // flips slides between display:none and display:block.
+          // Ideally we would not have to have ioslide-specific code
+          // here, but rather have ioslides raise a generic event,
+          // but the rmarkdown package just went to CRAN so the
+          // window to getting that fixed may be long.
+          if (window.addEventListener) {
+            // It's OK to limit this to window.addEventListener
+            // browsers because ioslides itself only supports
+            // such browsers.
+            on(document, "slideenter", resizeHandler);
+            on(document, "slideleave", resizeHandler);
+          }
+        }
+
+        var scriptData = document.querySelector("script[data-for='" + el.id + "'][type='application/json']");
+        if (scriptData) {
+          var data = JSON.parse(scriptData.textContent || scriptData.text);
+          // Resolve strings marked as javascript literals to objects
+          if (!(data.evals instanceof Array)) data.evals = [data.evals];
+          for (var k = 0; data.evals && k < data.evals.length; k++) {
+            window.HTMLWidgets.evaluateStringMember(data.x, data.evals[k]);
+          }
+          binding.renderValue(el, data.x, initResult);
+          evalAndRun(data.jsHooks.render, initResult, [el, data.x]);
+        }
+      });
+    });
+
+    invokePostRenderHandlers();
+  }
+
+
+  function has_jQuery3() {
+    if (!window.jQuery) {
+      return false;
+    }
+    var $version = window.jQuery.fn.jquery;
+    var $major_version = parseInt($version.split(".")[0]);
+    return $major_version >= 3;
+  }
+
+  /*
+  / Shiny 1.4 bumped jQuery from 1.x to 3.x which means jQuery's
+  / on-ready handler (i.e., $(fn)) is now asyncronous (i.e., it now
+  / really means $(setTimeout(fn)).
+  / https://jquery.com/upgrade-guide/3.0/#breaking-change-document-ready-handlers-are-now-asynchronous
+  /
+  / Since Shiny uses $() to schedule initShiny, shiny>=1.4 calls initShiny
+  / one tick later than it did before, which means staticRender() is
+  / called renderValue() earlier than (advanced) widget authors might be expecting.
+  / https://github.com/rstudio/shiny/issues/2630
+  /
+  / For a concrete example, leaflet has some methods (e.g., updateBounds)
+  / which reference Shiny methods registered in initShiny (e.g., setInputValue).
+  / Since leaflet is privy to this life-cycle, it knows to use setTimeout() to
+  / delay execution of those methods (until Shiny methods are ready)
+  / https://github.com/rstudio/leaflet/blob/18ec981/javascript/src/index.js#L266-L268
+  /
+  / Ideally widget authors wouldn't need to use this setTimeout() hack that
+  / leaflet uses to call Shiny methods on a staticRender(). In the long run,
+  / the logic initShiny should be broken up so that method registration happens
+  / right away, but binding happens later.
+  */
+  function maybeStaticRenderLater() {
+    if (shinyMode && has_jQuery3()) {
+      window.jQuery(window.HTMLWidgets.staticRender);
+    } else {
+      window.HTMLWidgets.staticRender();
+    }
+  }
+
+  if (document.addEventListener) {
+    document.addEventListener("DOMContentLoaded", function() {
+      document.removeEventListener("DOMContentLoaded", arguments.callee, false);
+      maybeStaticRenderLater();
+    }, false);
+  } else if (document.attachEvent) {
+    document.attachEvent("onreadystatechange", function() {
+      if (document.readyState === "complete") {
+        document.detachEvent("onreadystatechange", arguments.callee);
+        maybeStaticRenderLater();
+      }
+    });
+  }
+
+
+  window.HTMLWidgets.getAttachmentUrl = function(depname, key) {
+    // If no key, default to the first item
+    if (typeof(key) === "undefined")
+      key = 1;
+
+    var link = document.getElementById(depname + "-" + key + "-attachment");
+    if (!link) {
+      throw new Error("Attachment " + depname + "/" + key + " not found in document");
+    }
+    return link.getAttribute("href");
+  };
+
+  window.HTMLWidgets.dataframeToD3 = function(df) {
+    var names = [];
+    var length;
+    for (var name in df) {
+        if (df.hasOwnProperty(name))
+            names.push(name);
+        if (typeof(df[name]) !== "object" || typeof(df[name].length) === "undefined") {
+            throw new Error("All fields must be arrays");
+        } else if (typeof(length) !== "undefined" && length !== df[name].length) {
+            throw new Error("All fields must be arrays of the same length");
+        }
+        length = df[name].length;
+    }
+    var results = [];
+    var item;
+    for (var row = 0; row < length; row++) {
+        item = {};
+        for (var col = 0; col < names.length; col++) {
+            item[names[col]] = df[names[col]][row];
+        }
+        results.push(item);
+    }
+    return results;
+  };
+
+  window.HTMLWidgets.transposeArray2D = function(array) {
+      if (array.length === 0) return array;
+      var newArray = array[0].map(function(col, i) {
+          return array.map(function(row) {
+              return row[i]
+          })
+      });
+      return newArray;
+  };
+  // Split value at splitChar, but allow splitChar to be escaped
+  // using escapeChar. Any other characters escaped by escapeChar
+  // will be included as usual (including escapeChar itself).
+  function splitWithEscape(value, splitChar, escapeChar) {
+    var results = [];
+    var escapeMode = false;
+    var currentResult = "";
+    for (var pos = 0; pos < value.length; pos++) {
+      if (!escapeMode) {
+        if (value[pos] === splitChar) {
+          results.push(currentResult);
+          currentResult = "";
+        } else if (value[pos] === escapeChar) {
+          escapeMode = true;
+        } else {
+          currentResult += value[pos];
+        }
+      } else {
+        currentResult += value[pos];
+        escapeMode = false;
+      }
+    }
+    if (currentResult !== "") {
+      results.push(currentResult);
+    }
+    return results;
+  }
+  // Function authored by Yihui/JJ Allaire
+  window.HTMLWidgets.evaluateStringMember = function(o, member) {
+    var parts = splitWithEscape(member, '.', '\\');
+    for (var i = 0, l = parts.length; i < l; i++) {
+      var part = parts[i];
+      // part may be a character or 'numeric' member name
+      if (o !== null && typeof o === "object" && part in o) {
+        if (i == (l - 1)) { // if we are at the end of the line then evalulate
+          if (typeof o[part] === "string")
+            o[part] = tryEval(o[part]);
+        } else { // otherwise continue to next embedded object
+          o = o[part];
+        }
+      }
+    }
+  };
+
+  // Retrieve the HTMLWidget instance (i.e. the return value of an
+  // HTMLWidget binding's initialize() or factory() function)
+  // associated with an element, or null if none.
+  window.HTMLWidgets.getInstance = function(el) {
+    return elementData(el, "init_result");
+  };
+
+  // Finds the first element in the scope that matches the selector,
+  // and returns the HTMLWidget instance (i.e. the return value of
+  // an HTMLWidget binding's initialize() or factory() function)
+  // associated with that element, if any. If no element matches the
+  // selector, or the first matching element has no HTMLWidget
+  // instance associated with it, then null is returned.
+  //
+  // The scope argument is optional, and defaults to window.document.
+  window.HTMLWidgets.find = function(scope, selector) {
+    if (arguments.length == 1) {
+      selector = scope;
+      scope = document;
+    }
+
+    var el = scope.querySelector(selector);
+    if (el === null) {
+      return null;
+    } else {
+      return window.HTMLWidgets.getInstance(el);
+    }
+  };
+
+  // Finds all elements in the scope that match the selector, and
+  // returns the HTMLWidget instances (i.e. the return values of
+  // an HTMLWidget binding's initialize() or factory() function)
+  // associated with the elements, in an array. If elements that
+  // match the selector don't have an associated HTMLWidget
+  // instance, the returned array will contain nulls.
+  //
+  // The scope argument is optional, and defaults to window.document.
+  window.HTMLWidgets.findAll = function(scope, selector) {
+    if (arguments.length == 1) {
+      selector = scope;
+      scope = document;
+    }
+
+    var nodes = scope.querySelectorAll(selector);
+    var results = [];
+    for (var i = 0; i < nodes.length; i++) {
+      results.push(window.HTMLWidgets.getInstance(nodes[i]));
+    }
+    return results;
+  };
+
+  var postRenderHandlers = [];
+  function invokePostRenderHandlers() {
+    while (postRenderHandlers.length) {
+      var handler = postRenderHandlers.shift();
+      if (handler) {
+        handler();
+      }
+    }
+  }
+
+  // Register the given callback function to be invoked after the
+  // next time static widgets are rendered.
+  window.HTMLWidgets.addPostRenderHandler = function(callback) {
+    postRenderHandlers.push(callback);
+  };
+
+  // Takes a new-style instance-bound definition, and returns an
+  // old-style class-bound definition. This saves us from having
+  // to rewrite all the logic in this file to accomodate both
+  // types of definitions.
+  function createLegacyDefinitionAdapter(defn) {
+    var result = {
+      name: defn.name,
+      type: defn.type,
+      initialize: function(el, width, height) {
+        return defn.factory(el, width, height);
+      },
+      renderValue: function(el, x, instance) {
+        return instance.renderValue(x);
+      },
+      resize: function(el, width, height, instance) {
+        return instance.resize(width, height);
+      }
+    };
+
+    if (defn.find)
+      result.find = defn.find;
+    if (defn.renderError)
+      result.renderError = defn.renderError;
+    if (defn.clearError)
+      result.clearError = defn.clearError;
+
+    return result;
+  }
+})();
+
diff --git a/docs/articles/sunburst-2-0-0_files/sunburst-binding-2.1.6/sunburst.js b/docs/articles/sunburst-2-0-0_files/sunburst-binding-2.1.6/sunburst.js
new file mode 100644
index 0000000..abe692b
--- /dev/null
+++ b/docs/articles/sunburst-2-0-0_files/sunburst-binding-2.1.6/sunburst.js
@@ -0,0 +1,10666 @@
+(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(require('d3-format'), require('d3-selection'), require('d3-array'), require('d3-scale'), require('d3-shape'), require('d3-hierarchy'), require('d3-collection'), require('d3-transition'), require('d3plus-color'), require('d3-dispatch')) :
+	typeof define === 'function' && define.amd ? define(['d3-format', 'd3-selection', 'd3-array', 'd3-scale', 'd3-shape', 'd3-hierarchy', 'd3-collection', 'd3-transition', 'd3plus-color', 'd3-dispatch'], factory) :
+	(factory(global.d3,global.d3,global.d3,global.d3,global.d3,global.d3,global.d3,global.d3,global.d3plusColor,global.d3));
+}(this, (function (d3Format,d3Selection,d3Array,d3Scale,d3Shape,d3Hierarchy,d3Collection,d3Transition,d3plusColor,d3Dispatch) { 'use strict';
+
+// Copies a variable number of methods from source to target.
+function rebind (target, source) {
+  var i = 1, n = arguments.length, method;
+  while (++i < n) target[method = arguments[i]] = d3_rebind(target, source, source[method]);
+  return target;
+}
+
+// Method is assumed to be a standard D3 getter-setter:
+  // If passed with no arguments, gets the value.
+// If passed with arguments, sets the value and returns the target.
+function d3_rebind(target, source, method) {
+  return function() {
+    var value = method.apply(source, arguments);
+    return value === source ? target : value;
+  };
+}
+
+function draw (el, instance, dispatch_) {
+  // would be much nicer to implement transitions/animation
+  // remove previous in case of Shiny/dynamic
+  d3Selection.select(el).select(".sunburst-chart svg").remove();
+
+  var x = instance.x;
+  var json = instance.json;
+  var chart = instance.chart;
+
+  // Dimensions of sunburst
+  var width = el.getBoundingClientRect().width - (x.options.legend.w ? x.options.legend.w : 75);
+  var height = el.getBoundingClientRect().height - 70;
+  var radius = Math.min(width, height) / 2;
+
+  d3Selection.select(el).select(".sunburst-chart").append("svg")
+    .style("width", width + "px") // shouldnt have to do this
+    .style("height", height + "px"); // shouldnt have to do this
+
+  // Breadcrumb dimensions: width, height, spacing, width of tip/tail.
+  //  these will be the defaults
+  var b = {
+    w: 0, h: 30, s: 3, t: 10
+  };
+  //  if breadcrumb is provided in the option, we will overwrite
+  //   with what is provided
+  Object.keys(x.options.breadcrumb).map(function(ky){
+    b[ky] = x.options.breadcrumb[ky];
+  });
+/*
+  // Mapping of step names to colors.
+  var colors = {
+    "home": "#5687d1",
+    "product": "#7b615c",
+    "search": "#de783b",
+    "account": "#6ab975",
+    "other": "#a173d1",
+    "end": "#bbbbbb"
+  };
+*/
+
+  var colors = d3Scale.scaleOrdinal(d3Scale.schemeCategory20);
+
+  if(x.options.colors !== null){
+    // if an array then we assume the colors
+    //  represent an array of hexadecimal colors to be used
+    if(Array.isArray(x.options.colors)) {
+      try{
+        colors.range(x.options.colors);
+      } catch(e) {
+
+      }
+    }
+
+    // if an object with range then we assume
+    //  that this is an array of colors to be used as range
+    if(x.options.colors.range){
+      try{
+        colors.range(x.options.colors.range);
+      } catch(e) {
+
+      }
+    }
+
+    // if an object with domain then we assume
+    //  that this is an array of colors to be used as domain
+    //  for more precise control of the colors assigned
+    if(x.options.colors.domain){
+      try{
+        colors.domain(x.options.colors.domain);
+      } catch(e) {
+
+      }
+    }
+
+    // if a function then set to the function
+    if(typeof(x.options.colors) === "function") {
+      colors = x.options.colors;
+    }
+  }
+  // Total size of all segments; we set this later, after loading the data.
+  var totalSize = 0;
+
+  var vis = d3Selection.select(el).select(".sunburst-chart").select("svg")
+      .append("g")
+      .attr("id", el.id + "-container")
+      .attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");
+
+  var partitioner = d3Hierarchy.partition()
+      .size([2 * Math.PI, radius * radius]);
+
+  var arc_shape = d3Shape.arc()
+      .startAngle(function(d) { return d.x0; })
+      .endAngle(function(d) { return d.x1; })
+      .innerRadius(function(d) { return Math.sqrt(d.y0); })
+      .outerRadius(function(d) { return Math.sqrt(d.y1); });
+
+  createVisualization(json);
+
+  // set up a container for tasks to perform after completion
+  //  one example would be add callbacks for event handling
+  //  styling
+  if (!(typeof x.tasks === "undefined") ){
+    if ( (typeof x.tasks.length === "undefined") ||
+     (typeof x.tasks === "function" ) ) {
+       // handle a function not enclosed in array
+       // should be able to remove once using jsonlite
+       x.tasks = [x.tasks];
+    }
+    x.tasks.map(function(t){
+      // for each tasks call the task with el supplied as `this`
+      t.call({el:el,x:x,instance:instance});
+    });
+  }
+
+  // Main function to draw and set up the visualization, once we have the data.
+  function createVisualization(json) {
+
+    // Basic setup of page elements.
+    initializeBreadcrumbTrail();
+
+    // Bounding circle underneath the sunburst, to make it easier to detect
+    // when the mouse leaves the parent g.
+    vis.append("circle")
+        .attr("r", radius)
+        .style("opacity", 0);
+
+    // Turn the data into a d3 hierarchy
+    var root = d3Hierarchy.hierarchy(json);
+    
+    if(x.options.sumNodes === true) {
+      // Calculate sums unless x.options.sumNodes is false
+      root
+        .sum(function(d) {
+          // only sum if no children (or is leaf)
+          return d[x.options.valueField || "size"];
+        });
+    } else {
+      // Move valueField or "size" to node.value
+      root.each(function(d) {
+        d.value = d.data[x.options.valueField || "size"];
+      });
+
+      // Then we need to calculate root sum
+      root.value = root.children.reduce(
+        function(left, right) {
+          return left + right.value
+        },
+        0
+      );
+    }
+
+    // check for sort function
+    if(x.options.sortFunction){
+      root.sort(x.options.sortFunction);
+    }
+
+    // For efficiency, filter nodes to keep only those large enough to see.
+    var nodes = partitioner(root).descendants()
+        .filter(function(d) {
+            return (d.x1 - d.x0 > 0.005); // 0.005 radians = 0.29 degrees
+        });
+
+    var path = vis.data([json]).selectAll("path")
+        .data(nodes)
+        .enter().append("path")
+        .attr("display", function(d) { return d.depth ? null : "none"; })
+        .attr("d", arc_shape)
+        .attr("fill-rule", "evenodd")
+        .style("fill", function(d) { return colors.call(this, d.data.name); })
+        .style("opacity", 1)
+        .on("mouseover", mouseover)
+        .on("click", click);
+
+    // Add the mouseleave handler to the bounding circle.
+    d3Selection.select(el).select("#"+ el.id + "-container").on("mouseleave", mouseleave);
+
+    // Get total size of the tree = value of root node from partition.
+    totalSize = path.datum().value;
+
+    if(x.options.legend !== false) {
+      drawLegend(nodes);
+      d3Selection.select(el).select(".sunburst-togglelegend")
+        .style("visibility", "")
+        .on("click", toggleLegend);
+    } else {
+      removeLegend();
+    }
+
+   }
+
+  // Fade all but the current sequence, and show it in the breadcrumb trail.
+  function mouseover(d) {
+
+    var percentage = (100 * d.value / totalSize).toPrecision(3);
+    var percentageString = percentage + "%";
+    if (percentage < 0.1) {
+      percentageString = "< 0.1%";
+    }
+
+    var countString = [
+        '<span style = "font-size:.7em">',
+        d3Format.format("1.2s")(d.value) + ' of ' + d3Format.format("1.2s")(totalSize),
+        '</span>'
+      ].join('');
+
+    var explanationString = "";
+    if(x.options.percent && x.options.count){
+      explanationString = percentageString + '<br/>' + countString;
+    } else if(x.options.percent){
+      explanationString = percentageString;
+    } else if(x.options.count){
+      explanationString = countString;
+    }
+
+    //if explanation defined in R then use this instead
+    if(x.options.explanation !== null){
+      explanationString = x.options.explanation.bind(totalSize)(d);
+    }
+
+
+    d3Selection.select(el).selectAll(".sunburst-explanation")
+        .style("visibility", "")
+        .style("top",((height - 70)/2) + "px")
+        .style("width",width + "px")
+        .html(explanationString);
+
+    var sequenceArray = d.ancestors().reverse();
+    sequenceArray.shift(); // remove root node from the array
+
+    chart._selection = sequenceArray.map(
+      function(d){return d.data.name}
+    );
+    dispatch_.call("mouseover", chart._selection);
+
+    updateBreadcrumbs(sequenceArray, percentageString);
+
+    // Fade all the segments.
+    d3Selection.select(el).selectAll("path")
+        .style("opacity", 0.3);
+
+    // Then highlight only those that are an ancestor of the current segment.
+    vis.selectAll("path")
+        .filter(function(node) {
+                  return (sequenceArray.indexOf(node) >= 0);
+                })
+        .style("opacity", 1);
+  }
+
+  // Restore everything to full opacity when moving off the visualization.
+  function mouseleave(d) {
+
+    dispatch_.call("mouseleave", chart._selection);
+    chart._selection = [];
+
+    // Hide the breadcrumb trail
+    d3Selection.select(el).select("#" + el.id + "-trail")
+        .style("visibility", "hidden");
+
+    // Deactivate all segments during transition.
+    d3Selection.select(el).selectAll("path").on("mouseover", null);
+
+    // Transition each segment to full opacity and then reactivate it.
+    d3Selection.select(el).selectAll("path")
+        .transition()
+        .duration(1000)
+        .style("opacity", 1)
+        .on("end", function() {
+          d3Selection.select(this).on("mouseover", mouseover);
+        });
+
+    d3Selection.select(el).selectAll(".sunburst-explanation")
+        .style("visibility", "hidden");
+  }
+
+  function click(d,i) {
+    var sequenceArray = d.ancestors().reverse();
+    sequenceArray.shift(); // remove root node from the array
+
+    dispatch_.call("click", sequenceArray.map(
+      function(d){return d.data.name}
+    ));
+  }
+
+  function initializeBreadcrumbTrail() {
+    // Add the svg area.
+    var trail = d3Selection.select(el).select(".sunburst-sequence").select("svg");
+    if(trail.nodes().length === 0) {
+      trail = d3Selection.select(el).select(".sunburst-sequence").append("svg")
+        .attr("id", el.id + "-trail");
+      trail.append("text");
+    }
+
+    trail
+      .attr("width", width);
+      //.attr("height", 50)
+
+    // Add the label at the end, for the percentage.
+    trail.select("text")
+      .attr("id", el.id + "-endlabel")
+      .style("fill", "#000");
+  }
+
+  // Generate a string that describes the points of a breadcrumb polygon.
+  function breadcrumbPoints(d, i) {
+    var points = [];
+    points.push("0,0");
+    if (b.w <= 0) {
+      // calculate breadcrumb width based on string length
+      points.push(d.string_length + ",0");
+      points.push(d.string_length + b.t + "," + (b.h / 2));
+      points.push(d.string_length + "," + b.h);
+    } else {
+      points.push(b.w + ",0");
+      points.push(b.w + b.t + "," + (b.h / 2));
+      points.push(b.w + "," + b.h);
+    }
+    points.push("0," + b.h);
+
+    if (i > 0) { // Leftmost breadcrumb; don't include 6th vertex.
+      points.push(b.t + "," + (b.h / 2));
+    }
+    return points.join(" ");
+  }
+
+  // Update the breadcrumb trail to show the current sequence and percentage.
+  function updateBreadcrumbs(nodeArray, percentageString) {
+
+    // Data join; key function combines name and depth (= position in sequence).
+    var g = d3Selection.select(el).select("#" + el.id + "-trail")
+        .selectAll("g")
+        .data(nodeArray, function(d) { return d.data.name + d.depth; });
+
+    // Add breadcrumb and label for entering nodes.
+    var entering = g.enter().append("g");
+
+
+    if (b.w <= 0) {
+      // Create a node array that contains all the breadcrumb widths
+      // Calculate positions of breadcrumbs based on string lengths
+      var curr_breadcrumb_x = 0;
+      nodeArray[0].breadcrumb_x = 0;
+      nodeArray[0].breadcrumb_h = 0;
+
+      entering.append("polygon")
+          .style("z-index",function(d,i) { return(999-i); })
+          .style("fill", function(d) { return colors.call(this, d.data.name); });
+
+      entering.append("text")
+          .attr("x", b.t + 2)
+          .attr("y", b.h / 2)
+          .attr("dy", "0.35em")
+          .attr("text-anchor", "left")
+          .text(function(d) { return d.data.name; })
+          .style("fill", function(d) {
+            return d3plusColor.colorContrast(colors.call(this, d.data.name));
+          });
+
+      // Remove exiting nodes.
+      g.exit().remove();
+
+      // loop through each g element
+      //  calculate string length
+      //  draw the breadcrumb polygon
+      //  and determine if breadcrumb should be wrapped to next row
+      entering.merge(g).each(function(d,k){
+        var crumbg = d3Selection.select(this);
+        var my_string_length = crumbg.select("text").node().getBoundingClientRect().width;
+        nodeArray[k].string_length = my_string_length + 12;
+        crumbg.select("polygon").attr("points", function(d){
+          return breadcrumbPoints(d, k);
+        });
+        var my_g_length = crumbg.node().getBoundingClientRect().width;
+        curr_breadcrumb_x += k===0 ? 0 : nodeArray[k-1].string_length + b.s;
+        nodeArray[k].breadcrumb_h = k===0 ? 0 : nodeArray[k-1].breadcrumb_h;
+
+        if (curr_breadcrumb_x + my_g_length > width*0.99) {
+          nodeArray[k].breadcrumb_h += b.h;  // got to next line
+          curr_breadcrumb_x = b.t + b.s;     // restart counter
+        }
+        nodeArray[k].breadcrumb_x = curr_breadcrumb_x;
+      });
+
+
+      // Set position for entering and updating nodes.
+      entering.merge(g).attr("transform", function(d, i) {
+        return "translate(" + d.breadcrumb_x + ", "+d.breadcrumb_h+")";
+      });
+
+
+      // Now move and update the percentage at the end.
+      d3Selection.select(el).select("#" + el.id + "-trail").select("#" + el.id + "-endlabel")
+          .attr("x", function(d){
+            var bend = d3Selection.select(this);
+            var curr_breadcrumb_x = nodeArray[nodeArray.length-1].breadcrumb_x +  nodeArray[nodeArray.length-1].string_length + b.t + b.s;
+            var my_g_length = bend.node().getBoundingClientRect().width;
+
+            var curr_breadcrumb_h = nodeArray[nodeArray.length-1].breadcrumb_h + b.h/2;
+            if (curr_breadcrumb_x + my_g_length > width*0.99) {
+              curr_breadcrumb_h += b.h + b.h/2;
+              curr_breadcrumb_x = b.t + b.s;     // restart counter
+            }
+            bend.datum({
+              "breadcrumb_x": curr_breadcrumb_x,
+              "breadcrumb_h": curr_breadcrumb_h
+            });
+            return curr_breadcrumb_x;
+          })
+          .attr("y", function(d){return d.breadcrumb_h})
+          .attr("dy", "0.35em")
+          .attr("text-anchor", "start")
+          .text(percentageString);
+
+
+    } else {
+      entering.append("polygon")
+          .attr("points", breadcrumbPoints)
+          .style("fill", function(d) { return colors.call(this, d.data.name); });
+
+      entering.append("text")
+          .attr("x", (b.w + b.t) / 2)
+          .attr("y", b.h / 2)
+          .attr("dy", "0.35em")
+          .attr("text-anchor", "middle")
+          .text(function(d) { return d.data.name; })
+          .style("fill", function(d) {
+            return d3plusColor.colorContrast(colors.call(this, d.data.name));
+          });
+
+      // Set position for entering and updating nodes.
+      entering.merge(g).attr("transform", function(d, i) {
+        return "translate(" + i * (b.w + b.s) + ", 0)";
+      });
+
+      // Remove exiting nodes.
+      g.exit().remove();
+
+      // Now move and update the percentage at the end.
+      d3Selection.select(el).select("#" + el.id + "-trail").select("#" + el.id + "-endlabel")
+          .attr("x", (nodeArray.length + 0.5) * (b.w + b.s))
+          .attr("y", b.h / 2)
+          .attr("dy", "0.35em")
+          .attr("text-anchor", "middle")
+          .text(percentageString);
+
+    }
+
+    // Make the breadcrumb trail visible, if it's hidden.
+    d3Selection.select(el).select("#" + el.id + "-trail")
+        .style("visibility", "");
+
+  }
+
+  function drawLegend(nodes) {
+
+    // Dimensions of legend item: width, height, spacing, radius of rounded rect.
+    var li = {
+      w: 75, h: 30, s: 3, r: 3
+    };
+
+    //  if legend is provided in the option, we will overwrite
+    //   with what is provided
+    Object.keys(x.options.legend).map(function(ky){
+      li[ky] = x.options.legend[ky];
+    });
+
+    // remove if already drawn
+    d3Selection.select(el).select(".sunburst-legend svg").remove();
+
+    // get labels from node names
+    var labels = d3Collection.nest()
+      .key(function(d) {return d.data.name})
+      .entries(
+        nodes.sort(
+          function(a,b) {return d3Array.ascending(a.depth,b.depth)}
+        )
+      )
+      .map(function(d) {
+        return d.values[0];
+      })
+      .filter(function(d) {
+        return d.data.name !== "root";
+      });
+
+    var legend = d3Selection.select(el).select(".sunburst-legend").append("svg")
+        .attr("width", li.w)
+        .attr("height", labels.length * (li.h + li.s));
+
+    var g = legend.selectAll("g")
+        .data( function(){
+          if(x.options.legendOrder !== null){
+            return x.options.legendOrder.map(function(d) {
+              return labels.filter(function(dd) {return dd.data.name === d })[0];
+            });
+          } else {
+            // get sorted by top level
+            return labels;
+          }
+        })
+        .enter().append("g")
+        .attr("transform", function(d, i) {
+                return "translate(0," + i * (li.h + li.s) + ")";
+             });
+
+    g.append("rect")
+        .attr("rx", li.r)
+        .attr("ry", li.r)
+        .attr("width", li.w)
+        .attr("height", li.h)
+        .style("fill", function(d) { return colors.call(this, d.data.name); });
+
+    g.append("text")
+        .attr("x", li.w / 2)
+        .attr("y", li.h / 2)
+        .attr("dy", "0.35em")
+        .attr("text-anchor", "middle")
+        .text(function(d) { return d.data.name; })
+        .style("fill", function(d) {
+          return d3plusColor.colorContrast(colors.call(this, d.data.name));
+        });
+  }
+
+  function removeLegend() {
+    d3Selection.select(el).select(".sunburst-sidebar").remove();
+  }
+
+  function toggleLegend() {
+    var legend = d3Selection.select(el).select(".sunburst-legend");
+    if (legend.style("visibility") == "hidden") {
+      legend.style("visibility", "");
+    } else {
+      legend.style("visibility", "hidden");
+    }
+  }
+}
+
+var HTMLWidgets = window.HTMLWidgets;
+
+HTMLWidgets.widget({
+
+  name: 'sunburst',
+
+  type: 'output',
+
+  factory: function(el, width, height) {
+
+    var instance = {};
+
+    instance.chart = {};
+
+    var dispatch_ = d3Dispatch.dispatch("mouseover","mouseleave","click");
+    rebind(instance.chart, dispatch_, 'on');
+
+    // Take a 2-column CSV and transform it into a hierarchical structure suitable
+    // for a partition layout. The first column is a sequence of step names, from
+    // root to leaf, separated by hyphens. The second column is a count of how
+    // often that sequence occurred.
+    function buildHierarchy(csv) {
+      var root = {"name": "root", "children": []};
+      for (var i = 0; i < csv.length; i++) {
+        var sequence = csv[i][0];
+        var size = +csv[i][1];
+        if (isNaN(size)) { // e.g. if this is a header row
+          continue;
+        }
+        var parts = sequence.split("-");
+        var currentNode = root;
+        for (var j = 0; j < parts.length; j++) {
+          var children = currentNode["children"];
+          var nodeName = parts[j];
+          var childNode;
+          if (j + 1 < parts.length) {
+       // Not yet at the end of the sequence; move down the tree.
+     	var foundChild = false;
+     	for (var k = 0; k < children.length; k++) {
+     	  if (children[k]["name"] == nodeName) {
+     	    childNode = children[k];
+     	    foundChild = true;
+     	    break;
+     	  }
+     	}
+      // If we don't already have a child node for this branch, create it.
+     	if (!foundChild) {
+     	  childNode = {"name": nodeName, "children": []};
+     	  children.push(childNode);
+     	}
+     	currentNode = childNode;
+          } else {
+     	// Reached the end of the sequence; create a leaf node.
+     	childNode = {"name": nodeName, "size": size};
+     	children.push(childNode);
+          }
+        }
+      }
+      return root;
+
+    }
+
+    return {
+
+      renderValue: function(x) {
+
+        instance.x = x;
+
+        // x.data should be a data.frame in R so an Javascript Object of Objects
+        //     but buildHierarchy expects an Array of Arrays
+        //     so use d3.zip and apply to do this
+        var json = [];
+        if(typeof(x.csvdata) !== "undefined"){
+          json = buildHierarchy(
+            d3Array.zip.apply(
+              null,
+              Object.keys(x.csvdata).map(function(ky){return x.csvdata[ky]})
+            )
+          );
+        } else {
+          json = x.data;
+        }
+        instance.json = json;
+
+        draw(el, instance, dispatch_);
+
+      },
+
+      resize: function(width, height) {
+
+        draw(el, instance, dispatch_);
+
+      },
+
+      instance: instance
+
+    };
+  }
+});
+
+})));
+
+},{"d3-array":2,"d3-collection":3,"d3-dispatch":5,"d3-format":7,"d3-hierarchy":8,"d3-scale":11,"d3-selection":12,"d3-shape":13,"d3-transition":17,"d3plus-color":18}],2:[function(require,module,exports){
+// https://d3js.org/d3-array/ Version 1.2.0. Copyright 2017 Mike Bostock.
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+	typeof define === 'function' && define.amd ? define(['exports'], factory) :
+	(factory((global.d3 = global.d3 || {})));
+}(this, (function (exports) { 'use strict';
+
+var ascending = function(a, b) {
+  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
+};
+
+var bisector = function(compare) {
+  if (compare.length === 1) compare = ascendingComparator(compare);
+  return {
+    left: function(a, x, lo, hi) {
+      if (lo == null) lo = 0;
+      if (hi == null) hi = a.length;
+      while (lo < hi) {
+        var mid = lo + hi >>> 1;
+        if (compare(a[mid], x) < 0) lo = mid + 1;
+        else hi = mid;
+      }
+      return lo;
+    },
+    right: function(a, x, lo, hi) {
+      if (lo == null) lo = 0;
+      if (hi == null) hi = a.length;
+      while (lo < hi) {
+        var mid = lo + hi >>> 1;
+        if (compare(a[mid], x) > 0) hi = mid;
+        else lo = mid + 1;
+      }
+      return lo;
+    }
+  };
+};
+
+function ascendingComparator(f) {
+  return function(d, x) {
+    return ascending(f(d), x);
+  };
+}
+
+var ascendingBisect = bisector(ascending);
+var bisectRight = ascendingBisect.right;
+var bisectLeft = ascendingBisect.left;
+
+var pairs = function(array, f) {
+  if (f == null) f = pair;
+  var i = 0, n = array.length - 1, p = array[0], pairs = new Array(n < 0 ? 0 : n);
+  while (i < n) pairs[i] = f(p, p = array[++i]);
+  return pairs;
+};
+
+function pair(a, b) {
+  return [a, b];
+}
+
+var cross = function(values0, values1, reduce) {
+  var n0 = values0.length,
+      n1 = values1.length,
+      values = new Array(n0 * n1),
+      i0,
+      i1,
+      i,
+      value0;
+
+  if (reduce == null) reduce = pair;
+
+  for (i0 = i = 0; i0 < n0; ++i0) {
+    for (value0 = values0[i0], i1 = 0; i1 < n1; ++i1, ++i) {
+      values[i] = reduce(value0, values1[i1]);
+    }
+  }
+
+  return values;
+};
+
+var descending = function(a, b) {
+  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
+};
+
+var number = function(x) {
+  return x === null ? NaN : +x;
+};
+
+var variance = function(values, valueof) {
+  var n = values.length,
+      m = 0,
+      i = -1,
+      mean = 0,
+      value,
+      delta,
+      sum = 0;
+
+  if (valueof == null) {
+    while (++i < n) {
+      if (!isNaN(value = number(values[i]))) {
+        delta = value - mean;
+        mean += delta / ++m;
+        sum += delta * (value - mean);
+      }
+    }
+  }
+
+  else {
+    while (++i < n) {
+      if (!isNaN(value = number(valueof(values[i], i, values)))) {
+        delta = value - mean;
+        mean += delta / ++m;
+        sum += delta * (value - mean);
+      }
+    }
+  }
+
+  if (m > 1) return sum / (m - 1);
+};
+
+var deviation = function(array, f) {
+  var v = variance(array, f);
+  return v ? Math.sqrt(v) : v;
+};
+
+var extent = function(values, valueof) {
+  var n = values.length,
+      i = -1,
+      value,
+      min,
+      max;
+
+  if (valueof == null) {
+    while (++i < n) { // Find the first comparable value.
+      if ((value = values[i]) != null && value >= value) {
+        min = max = value;
+        while (++i < n) { // Compare the remaining values.
+          if ((value = values[i]) != null) {
+            if (min > value) min = value;
+            if (max < value) max = value;
+          }
+        }
+      }
+    }
+  }
+
+  else {
+    while (++i < n) { // Find the first comparable value.
+      if ((value = valueof(values[i], i, values)) != null && value >= value) {
+        min = max = value;
+        while (++i < n) { // Compare the remaining values.
+          if ((value = valueof(values[i], i, values)) != null) {
+            if (min > value) min = value;
+            if (max < value) max = value;
+          }
+        }
+      }
+    }
+  }
+
+  return [min, max];
+};
+
+var array = Array.prototype;
+
+var slice = array.slice;
+var map = array.map;
+
+var constant = function(x) {
+  return function() {
+    return x;
+  };
+};
+
+var identity = function(x) {
+  return x;
+};
+
+var range = function(start, stop, step) {
+  start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;
+
+  var i = -1,
+      n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
+      range = new Array(n);
+
+  while (++i < n) {
+    range[i] = start + i * step;
+  }
+
+  return range;
+};
+
+var e10 = Math.sqrt(50);
+var e5 = Math.sqrt(10);
+var e2 = Math.sqrt(2);
+
+var ticks = function(start, stop, count) {
+  var reverse = stop < start,
+      i = -1,
+      n,
+      ticks,
+      step;
+
+  if (reverse) n = start, start = stop, stop = n;
+
+  if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) return [];
+
+  if (step > 0) {
+    start = Math.ceil(start / step);
+    stop = Math.floor(stop / step);
+    ticks = new Array(n = Math.ceil(stop - start + 1));
+    while (++i < n) ticks[i] = (start + i) * step;
+  } else {
+    start = Math.floor(start * step);
+    stop = Math.ceil(stop * step);
+    ticks = new Array(n = Math.ceil(start - stop + 1));
+    while (++i < n) ticks[i] = (start - i) / step;
+  }
+
+  if (reverse) ticks.reverse();
+
+  return ticks;
+};
+
+function tickIncrement(start, stop, count) {
+  var step = (stop - start) / Math.max(0, count),
+      power = Math.floor(Math.log(step) / Math.LN10),
+      error = step / Math.pow(10, power);
+  return power >= 0
+      ? (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1) * Math.pow(10, power)
+      : -Math.pow(10, -power) / (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1);
+}
+
+function tickStep(start, stop, count) {
+  var step0 = Math.abs(stop - start) / Math.max(0, count),
+      step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),
+      error = step0 / step1;
+  if (error >= e10) step1 *= 10;
+  else if (error >= e5) step1 *= 5;
+  else if (error >= e2) step1 *= 2;
+  return stop < start ? -step1 : step1;
+}
+
+var sturges = function(values) {
+  return Math.ceil(Math.log(values.length) / Math.LN2) + 1;
+};
+
+var histogram = function() {
+  var value = identity,
+      domain = extent,
+      threshold = sturges;
+
+  function histogram(data) {
+    var i,
+        n = data.length,
+        x,
+        values = new Array(n);
+
+    for (i = 0; i < n; ++i) {
+      values[i] = value(data[i], i, data);
+    }
+
+    var xz = domain(values),
+        x0 = xz[0],
+        x1 = xz[1],
+        tz = threshold(values, x0, x1);
+
+    // Convert number of thresholds into uniform thresholds.
+    if (!Array.isArray(tz)) {
+      tz = tickStep(x0, x1, tz);
+      tz = range(Math.ceil(x0 / tz) * tz, Math.floor(x1 / tz) * tz, tz); // exclusive
+    }
+
+    // Remove any thresholds outside the domain.
+    var m = tz.length;
+    while (tz[0] <= x0) tz.shift(), --m;
+    while (tz[m - 1] > x1) tz.pop(), --m;
+
+    var bins = new Array(m + 1),
+        bin;
+
+    // Initialize bins.
+    for (i = 0; i <= m; ++i) {
+      bin = bins[i] = [];
+      bin.x0 = i > 0 ? tz[i - 1] : x0;
+      bin.x1 = i < m ? tz[i] : x1;
+    }
+
+    // Assign data to bins by value, ignoring any outside the domain.
+    for (i = 0; i < n; ++i) {
+      x = values[i];
+      if (x0 <= x && x <= x1) {
+        bins[bisectRight(tz, x, 0, m)].push(data[i]);
+      }
+    }
+
+    return bins;
+  }
+
+  histogram.value = function(_) {
+    return arguments.length ? (value = typeof _ === "function" ? _ : constant(_), histogram) : value;
+  };
+
+  histogram.domain = function(_) {
+    return arguments.length ? (domain = typeof _ === "function" ? _ : constant([_[0], _[1]]), histogram) : domain;
+  };
+
+  histogram.thresholds = function(_) {
+    return arguments.length ? (threshold = typeof _ === "function" ? _ : Array.isArray(_) ? constant(slice.call(_)) : constant(_), histogram) : threshold;
+  };
+
+  return histogram;
+};
+
+var quantile = function(values, p, valueof) {
+  if (valueof == null) valueof = number;
+  if (!(n = values.length)) return;
+  if ((p = +p) <= 0 || n < 2) return +valueof(values[0], 0, values);
+  if (p >= 1) return +valueof(values[n - 1], n - 1, values);
+  var n,
+      i = (n - 1) * p,
+      i0 = Math.floor(i),
+      value0 = +valueof(values[i0], i0, values),
+      value1 = +valueof(values[i0 + 1], i0 + 1, values);
+  return value0 + (value1 - value0) * (i - i0);
+};
+
+var freedmanDiaconis = function(values, min, max) {
+  values = map.call(values, number).sort(ascending);
+  return Math.ceil((max - min) / (2 * (quantile(values, 0.75) - quantile(values, 0.25)) * Math.pow(values.length, -1 / 3)));
+};
+
+var scott = function(values, min, max) {
+  return Math.ceil((max - min) / (3.5 * deviation(values) * Math.pow(values.length, -1 / 3)));
+};
+
+var max = function(values, valueof) {
+  var n = values.length,
+      i = -1,
+      value,
+      max;
+
+  if (valueof == null) {
+    while (++i < n) { // Find the first comparable value.
+      if ((value = values[i]) != null && value >= value) {
+        max = value;
+        while (++i < n) { // Compare the remaining values.
+          if ((value = values[i]) != null && value > max) {
+            max = value;
+          }
+        }
+      }
+    }
+  }
+
+  else {
+    while (++i < n) { // Find the first comparable value.
+      if ((value = valueof(values[i], i, values)) != null && value >= value) {
+        max = value;
+        while (++i < n) { // Compare the remaining values.
+          if ((value = valueof(values[i], i, values)) != null && value > max) {
+            max = value;
+          }
+        }
+      }
+    }
+  }
+
+  return max;
+};
+
+var mean = function(values, valueof) {
+  var n = values.length,
+      m = n,
+      i = -1,
+      value,
+      sum = 0;
+
+  if (valueof == null) {
+    while (++i < n) {
+      if (!isNaN(value = number(values[i]))) sum += value;
+      else --m;
+    }
+  }
+
+  else {
+    while (++i < n) {
+      if (!isNaN(value = number(valueof(values[i], i, values)))) sum += value;
+      else --m;
+    }
+  }
+
+  if (m) return sum / m;
+};
+
+var median = function(values, valueof) {
+  var n = values.length,
+      i = -1,
+      value,
+      numbers = [];
+
+  if (valueof == null) {
+    while (++i < n) {
+      if (!isNaN(value = number(values[i]))) {
+        numbers.push(value);
+      }
+    }
+  }
+
+  else {
+    while (++i < n) {
+      if (!isNaN(value = number(valueof(values[i], i, values)))) {
+        numbers.push(value);
+      }
+    }
+  }
+
+  return quantile(numbers.sort(ascending), 0.5);
+};
+
+var merge = function(arrays) {
+  var n = arrays.length,
+      m,
+      i = -1,
+      j = 0,
+      merged,
+      array;
+
+  while (++i < n) j += arrays[i].length;
+  merged = new Array(j);
+
+  while (--n >= 0) {
+    array = arrays[n];
+    m = array.length;
+    while (--m >= 0) {
+      merged[--j] = array[m];
+    }
+  }
+
+  return merged;
+};
+
+var min = function(values, valueof) {
+  var n = values.length,
+      i = -1,
+      value,
+      min;
+
+  if (valueof == null) {
+    while (++i < n) { // Find the first comparable value.
+      if ((value = values[i]) != null && value >= value) {
+        min = value;
+        while (++i < n) { // Compare the remaining values.
+          if ((value = values[i]) != null && min > value) {
+            min = value;
+          }
+        }
+      }
+    }
+  }
+
+  else {
+    while (++i < n) { // Find the first comparable value.
+      if ((value = valueof(values[i], i, values)) != null && value >= value) {
+        min = value;
+        while (++i < n) { // Compare the remaining values.
+          if ((value = valueof(values[i], i, values)) != null && min > value) {
+            min = value;
+          }
+        }
+      }
+    }
+  }
+
+  return min;
+};
+
+var permute = function(array, indexes) {
+  var i = indexes.length, permutes = new Array(i);
+  while (i--) permutes[i] = array[indexes[i]];
+  return permutes;
+};
+
+var scan = function(values, compare) {
+  if (!(n = values.length)) return;
+  var n,
+      i = 0,
+      j = 0,
+      xi,
+      xj = values[j];
+
+  if (compare == null) compare = ascending;
+
+  while (++i < n) {
+    if (compare(xi = values[i], xj) < 0 || compare(xj, xj) !== 0) {
+      xj = xi, j = i;
+    }
+  }
+
+  if (compare(xj, xj) === 0) return j;
+};
+
+var shuffle = function(array, i0, i1) {
+  var m = (i1 == null ? array.length : i1) - (i0 = i0 == null ? 0 : +i0),
+      t,
+      i;
+
+  while (m) {
+    i = Math.random() * m-- | 0;
+    t = array[m + i0];
+    array[m + i0] = array[i + i0];
+    array[i + i0] = t;
+  }
+
+  return array;
+};
+
+var sum = function(values, valueof) {
+  var n = values.length,
+      i = -1,
+      value,
+      sum = 0;
+
+  if (valueof == null) {
+    while (++i < n) {
+      if (value = +values[i]) sum += value; // Note: zero and null are equivalent.
+    }
+  }
+
+  else {
+    while (++i < n) {
+      if (value = +valueof(values[i], i, values)) sum += value;
+    }
+  }
+
+  return sum;
+};
+
+var transpose = function(matrix) {
+  if (!(n = matrix.length)) return [];
+  for (var i = -1, m = min(matrix, length), transpose = new Array(m); ++i < m;) {
+    for (var j = -1, n, row = transpose[i] = new Array(n); ++j < n;) {
+      row[j] = matrix[j][i];
+    }
+  }
+  return transpose;
+};
+
+function length(d) {
+  return d.length;
+}
+
+var zip = function() {
+  return transpose(arguments);
+};
+
+exports.bisect = bisectRight;
+exports.bisectRight = bisectRight;
+exports.bisectLeft = bisectLeft;
+exports.ascending = ascending;
+exports.bisector = bisector;
+exports.cross = cross;
+exports.descending = descending;
+exports.deviation = deviation;
+exports.extent = extent;
+exports.histogram = histogram;
+exports.thresholdFreedmanDiaconis = freedmanDiaconis;
+exports.thresholdScott = scott;
+exports.thresholdSturges = sturges;
+exports.max = max;
+exports.mean = mean;
+exports.median = median;
+exports.merge = merge;
+exports.min = min;
+exports.pairs = pairs;
+exports.permute = permute;
+exports.quantile = quantile;
+exports.range = range;
+exports.scan = scan;
+exports.shuffle = shuffle;
+exports.sum = sum;
+exports.ticks = ticks;
+exports.tickIncrement = tickIncrement;
+exports.tickStep = tickStep;
+exports.transpose = transpose;
+exports.variance = variance;
+exports.zip = zip;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+
+},{}],3:[function(require,module,exports){
+// https://d3js.org/d3-collection/ Version 1.0.3. Copyright 2017 Mike Bostock.
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+	typeof define === 'function' && define.amd ? define(['exports'], factory) :
+	(factory((global.d3 = global.d3 || {})));
+}(this, (function (exports) { 'use strict';
+
+var prefix = "$";
+
+function Map() {}
+
+Map.prototype = map.prototype = {
+  constructor: Map,
+  has: function(key) {
+    return (prefix + key) in this;
+  },
+  get: function(key) {
+    return this[prefix + key];
+  },
+  set: function(key, value) {
+    this[prefix + key] = value;
+    return this;
+  },
+  remove: function(key) {
+    var property = prefix + key;
+    return property in this && delete this[property];
+  },
+  clear: function() {
+    for (var property in this) if (property[0] === prefix) delete this[property];
+  },
+  keys: function() {
+    var keys = [];
+    for (var property in this) if (property[0] === prefix) keys.push(property.slice(1));
+    return keys;
+  },
+  values: function() {
+    var values = [];
+    for (var property in this) if (property[0] === prefix) values.push(this[property]);
+    return values;
+  },
+  entries: function() {
+    var entries = [];
+    for (var property in this) if (property[0] === prefix) entries.push({key: property.slice(1), value: this[property]});
+    return entries;
+  },
+  size: function() {
+    var size = 0;
+    for (var property in this) if (property[0] === prefix) ++size;
+    return size;
+  },
+  empty: function() {
+    for (var property in this) if (property[0] === prefix) return false;
+    return true;
+  },
+  each: function(f) {
+    for (var property in this) if (property[0] === prefix) f(this[property], property.slice(1), this);
+  }
+};
+
+function map(object, f) {
+  var map = new Map;
+
+  // Copy constructor.
+  if (object instanceof Map) object.each(function(value, key) { map.set(key, value); });
+
+  // Index array by numeric index or specified key function.
+  else if (Array.isArray(object)) {
+    var i = -1,
+        n = object.length,
+        o;
+
+    if (f == null) while (++i < n) map.set(i, object[i]);
+    else while (++i < n) map.set(f(o = object[i], i, object), o);
+  }
+
+  // Convert object to map.
+  else if (object) for (var key in object) map.set(key, object[key]);
+
+  return map;
+}
+
+var nest = function() {
+  var keys = [],
+      sortKeys = [],
+      sortValues,
+      rollup,
+      nest;
+
+  function apply(array, depth, createResult, setResult) {
+    if (depth >= keys.length) return rollup != null
+        ? rollup(array) : (sortValues != null
+        ? array.sort(sortValues)
+        : array);
+
+    var i = -1,
+        n = array.length,
+        key = keys[depth++],
+        keyValue,
+        value,
+        valuesByKey = map(),
+        values,
+        result = createResult();
+
+    while (++i < n) {
+      if (values = valuesByKey.get(keyValue = key(value = array[i]) + "")) {
+        values.push(value);
+      } else {
+        valuesByKey.set(keyValue, [value]);
+      }
+    }
+
+    valuesByKey.each(function(values, key) {
+      setResult(result, key, apply(values, depth, createResult, setResult));
+    });
+
+    return result;
+  }
+
+  function entries(map$$1, depth) {
+    if (++depth > keys.length) return map$$1;
+    var array, sortKey = sortKeys[depth - 1];
+    if (rollup != null && depth >= keys.length) array = map$$1.entries();
+    else array = [], map$$1.each(function(v, k) { array.push({key: k, values: entries(v, depth)}); });
+    return sortKey != null ? array.sort(function(a, b) { return sortKey(a.key, b.key); }) : array;
+  }
+
+  return nest = {
+    object: function(array) { return apply(array, 0, createObject, setObject); },
+    map: function(array) { return apply(array, 0, createMap, setMap); },
+    entries: function(array) { return entries(apply(array, 0, createMap, setMap), 0); },
+    key: function(d) { keys.push(d); return nest; },
+    sortKeys: function(order) { sortKeys[keys.length - 1] = order; return nest; },
+    sortValues: function(order) { sortValues = order; return nest; },
+    rollup: function(f) { rollup = f; return nest; }
+  };
+};
+
+function createObject() {
+  return {};
+}
+
+function setObject(object, key, value) {
+  object[key] = value;
+}
+
+function createMap() {
+  return map();
+}
+
+function setMap(map$$1, key, value) {
+  map$$1.set(key, value);
+}
+
+function Set() {}
+
+var proto = map.prototype;
+
+Set.prototype = set.prototype = {
+  constructor: Set,
+  has: proto.has,
+  add: function(value) {
+    value += "";
+    this[prefix + value] = value;
+    return this;
+  },
+  remove: proto.remove,
+  clear: proto.clear,
+  values: proto.keys,
+  size: proto.size,
+  empty: proto.empty,
+  each: proto.each
+};
+
+function set(object, f) {
+  var set = new Set;
+
+  // Copy constructor.
+  if (object instanceof Set) object.each(function(value) { set.add(value); });
+
+  // Otherwise, assume it’s an array.
+  else if (object) {
+    var i = -1, n = object.length;
+    if (f == null) while (++i < n) set.add(object[i]);
+    else while (++i < n) set.add(f(object[i], i, object));
+  }
+
+  return set;
+}
+
+var keys = function(map) {
+  var keys = [];
+  for (var key in map) keys.push(key);
+  return keys;
+};
+
+var values = function(map) {
+  var values = [];
+  for (var key in map) values.push(map[key]);
+  return values;
+};
+
+var entries = function(map) {
+  var entries = [];
+  for (var key in map) entries.push({key: key, value: map[key]});
+  return entries;
+};
+
+exports.nest = nest;
+exports.set = set;
+exports.map = map;
+exports.keys = keys;
+exports.values = values;
+exports.entries = entries;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+
+},{}],4:[function(require,module,exports){
+// https://d3js.org/d3-color/ Version 1.0.3. Copyright 2017 Mike Bostock.
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+	typeof define === 'function' && define.amd ? define(['exports'], factory) :
+	(factory((global.d3 = global.d3 || {})));
+}(this, (function (exports) { 'use strict';
+
+var define = function(constructor, factory, prototype) {
+  constructor.prototype = factory.prototype = prototype;
+  prototype.constructor = constructor;
+};
+
+function extend(parent, definition) {
+  var prototype = Object.create(parent.prototype);
+  for (var key in definition) prototype[key] = definition[key];
+  return prototype;
+}
+
+function Color() {}
+
+var darker = 0.7;
+var brighter = 1 / darker;
+
+var reI = "\\s*([+-]?\\d+)\\s*";
+var reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*";
+var reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*";
+var reHex3 = /^#([0-9a-f]{3})$/;
+var reHex6 = /^#([0-9a-f]{6})$/;
+var reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$");
+var reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$");
+var reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$");
+var reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$");
+var reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$");
+var reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");
+
+var named = {
+  aliceblue: 0xf0f8ff,
+  antiquewhite: 0xfaebd7,
+  aqua: 0x00ffff,
+  aquamarine: 0x7fffd4,
+  azure: 0xf0ffff,
+  beige: 0xf5f5dc,
+  bisque: 0xffe4c4,
+  black: 0x000000,
+  blanchedalmond: 0xffebcd,
+  blue: 0x0000ff,
+  blueviolet: 0x8a2be2,
+  brown: 0xa52a2a,
+  burlywood: 0xdeb887,
+  cadetblue: 0x5f9ea0,
+  chartreuse: 0x7fff00,
+  chocolate: 0xd2691e,
+  coral: 0xff7f50,
+  cornflowerblue: 0x6495ed,
+  cornsilk: 0xfff8dc,
+  crimson: 0xdc143c,
+  cyan: 0x00ffff,
+  darkblue: 0x00008b,
+  darkcyan: 0x008b8b,
+  darkgoldenrod: 0xb8860b,
+  darkgray: 0xa9a9a9,
+  darkgreen: 0x006400,
+  darkgrey: 0xa9a9a9,
+  darkkhaki: 0xbdb76b,
+  darkmagenta: 0x8b008b,
+  darkolivegreen: 0x556b2f,
+  darkorange: 0xff8c00,
+  darkorchid: 0x9932cc,
+  darkred: 0x8b0000,
+  darksalmon: 0xe9967a,
+  darkseagreen: 0x8fbc8f,
+  darkslateblue: 0x483d8b,
+  darkslategray: 0x2f4f4f,
+  darkslategrey: 0x2f4f4f,
+  darkturquoise: 0x00ced1,
+  darkviolet: 0x9400d3,
+  deeppink: 0xff1493,
+  deepskyblue: 0x00bfff,
+  dimgray: 0x696969,
+  dimgrey: 0x696969,
+  dodgerblue: 0x1e90ff,
+  firebrick: 0xb22222,
+  floralwhite: 0xfffaf0,
+  forestgreen: 0x228b22,
+  fuchsia: 0xff00ff,
+  gainsboro: 0xdcdcdc,
+  ghostwhite: 0xf8f8ff,
+  gold: 0xffd700,
+  goldenrod: 0xdaa520,
+  gray: 0x808080,
+  green: 0x008000,
+  greenyellow: 0xadff2f,
+  grey: 0x808080,
+  honeydew: 0xf0fff0,
+  hotpink: 0xff69b4,
+  indianred: 0xcd5c5c,
+  indigo: 0x4b0082,
+  ivory: 0xfffff0,
+  khaki: 0xf0e68c,
+  lavender: 0xe6e6fa,
+  lavenderblush: 0xfff0f5,
+  lawngreen: 0x7cfc00,
+  lemonchiffon: 0xfffacd,
+  lightblue: 0xadd8e6,
+  lightcoral: 0xf08080,
+  lightcyan: 0xe0ffff,
+  lightgoldenrodyellow: 0xfafad2,
+  lightgray: 0xd3d3d3,
+  lightgreen: 0x90ee90,
+  lightgrey: 0xd3d3d3,
+  lightpink: 0xffb6c1,
+  lightsalmon: 0xffa07a,
+  lightseagreen: 0x20b2aa,
+  lightskyblue: 0x87cefa,
+  lightslategray: 0x778899,
+  lightslategrey: 0x778899,
+  lightsteelblue: 0xb0c4de,
+  lightyellow: 0xffffe0,
+  lime: 0x00ff00,
+  limegreen: 0x32cd32,
+  linen: 0xfaf0e6,
+  magenta: 0xff00ff,
+  maroon: 0x800000,
+  mediumaquamarine: 0x66cdaa,
+  mediumblue: 0x0000cd,
+  mediumorchid: 0xba55d3,
+  mediumpurple: 0x9370db,
+  mediumseagreen: 0x3cb371,
+  mediumslateblue: 0x7b68ee,
+  mediumspringgreen: 0x00fa9a,
+  mediumturquoise: 0x48d1cc,
+  mediumvioletred: 0xc71585,
+  midnightblue: 0x191970,
+  mintcream: 0xf5fffa,
+  mistyrose: 0xffe4e1,
+  moccasin: 0xffe4b5,
+  navajowhite: 0xffdead,
+  navy: 0x000080,
+  oldlace: 0xfdf5e6,
+  olive: 0x808000,
+  olivedrab: 0x6b8e23,
+  orange: 0xffa500,
+  orangered: 0xff4500,
+  orchid: 0xda70d6,
+  palegoldenrod: 0xeee8aa,
+  palegreen: 0x98fb98,
+  paleturquoise: 0xafeeee,
+  palevioletred: 0xdb7093,
+  papayawhip: 0xffefd5,
+  peachpuff: 0xffdab9,
+  peru: 0xcd853f,
+  pink: 0xffc0cb,
+  plum: 0xdda0dd,
+  powderblue: 0xb0e0e6,
+  purple: 0x800080,
+  rebeccapurple: 0x663399,
+  red: 0xff0000,
+  rosybrown: 0xbc8f8f,
+  royalblue: 0x4169e1,
+  saddlebrown: 0x8b4513,
+  salmon: 0xfa8072,
+  sandybrown: 0xf4a460,
+  seagreen: 0x2e8b57,
+  seashell: 0xfff5ee,
+  sienna: 0xa0522d,
+  silver: 0xc0c0c0,
+  skyblue: 0x87ceeb,
+  slateblue: 0x6a5acd,
+  slategray: 0x708090,
+  slategrey: 0x708090,
+  snow: 0xfffafa,
+  springgreen: 0x00ff7f,
+  steelblue: 0x4682b4,
+  tan: 0xd2b48c,
+  teal: 0x008080,
+  thistle: 0xd8bfd8,
+  tomato: 0xff6347,
+  turquoise: 0x40e0d0,
+  violet: 0xee82ee,
+  wheat: 0xf5deb3,
+  white: 0xffffff,
+  whitesmoke: 0xf5f5f5,
+  yellow: 0xffff00,
+  yellowgreen: 0x9acd32
+};
+
+define(Color, color, {
+  displayable: function() {
+    return this.rgb().displayable();
+  },
+  toString: function() {
+    return this.rgb() + "";
+  }
+});
+
+function color(format) {
+  var m;
+  format = (format + "").trim().toLowerCase();
+  return (m = reHex3.exec(format)) ? (m = parseInt(m[1], 16), new Rgb((m >> 8 & 0xf) | (m >> 4 & 0x0f0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1)) // #f00
+      : (m = reHex6.exec(format)) ? rgbn(parseInt(m[1], 16)) // #ff0000
+      : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
+      : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
+      : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
+      : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
+      : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
+      : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
+      : named.hasOwnProperty(format) ? rgbn(named[format])
+      : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0)
+      : null;
+}
+
+function rgbn(n) {
+  return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
+}
+
+function rgba(r, g, b, a) {
+  if (a <= 0) r = g = b = NaN;
+  return new Rgb(r, g, b, a);
+}
+
+function rgbConvert(o) {
+  if (!(o instanceof Color)) o = color(o);
+  if (!o) return new Rgb;
+  o = o.rgb();
+  return new Rgb(o.r, o.g, o.b, o.opacity);
+}
+
+function rgb(r, g, b, opacity) {
+  return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
+}
+
+function Rgb(r, g, b, opacity) {
+  this.r = +r;
+  this.g = +g;
+  this.b = +b;
+  this.opacity = +opacity;
+}
+
+define(Rgb, rgb, extend(Color, {
+  brighter: function(k) {
+    k = k == null ? brighter : Math.pow(brighter, k);
+    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
+  },
+  darker: function(k) {
+    k = k == null ? darker : Math.pow(darker, k);
+    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
+  },
+  rgb: function() {
+    return this;
+  },
+  displayable: function() {
+    return (0 <= this.r && this.r <= 255)
+        && (0 <= this.g && this.g <= 255)
+        && (0 <= this.b && this.b <= 255)
+        && (0 <= this.opacity && this.opacity <= 1);
+  },
+  toString: function() {
+    var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
+    return (a === 1 ? "rgb(" : "rgba(")
+        + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", "
+        + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", "
+        + Math.max(0, Math.min(255, Math.round(this.b) || 0))
+        + (a === 1 ? ")" : ", " + a + ")");
+  }
+}));
+
+function hsla(h, s, l, a) {
+  if (a <= 0) h = s = l = NaN;
+  else if (l <= 0 || l >= 1) h = s = NaN;
+  else if (s <= 0) h = NaN;
+  return new Hsl(h, s, l, a);
+}
+
+function hslConvert(o) {
+  if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);
+  if (!(o instanceof Color)) o = color(o);
+  if (!o) return new Hsl;
+  if (o instanceof Hsl) return o;
+  o = o.rgb();
+  var r = o.r / 255,
+      g = o.g / 255,
+      b = o.b / 255,
+      min = Math.min(r, g, b),
+      max = Math.max(r, g, b),
+      h = NaN,
+      s = max - min,
+      l = (max + min) / 2;
+  if (s) {
+    if (r === max) h = (g - b) / s + (g < b) * 6;
+    else if (g === max) h = (b - r) / s + 2;
+    else h = (r - g) / s + 4;
+    s /= l < 0.5 ? max + min : 2 - max - min;
+    h *= 60;
+  } else {
+    s = l > 0 && l < 1 ? 0 : h;
+  }
+  return new Hsl(h, s, l, o.opacity);
+}
+
+function hsl(h, s, l, opacity) {
+  return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
+}
+
+function Hsl(h, s, l, opacity) {
+  this.h = +h;
+  this.s = +s;
+  this.l = +l;
+  this.opacity = +opacity;
+}
+
+define(Hsl, hsl, extend(Color, {
+  brighter: function(k) {
+    k = k == null ? brighter : Math.pow(brighter, k);
+    return new Hsl(this.h, this.s, this.l * k, this.opacity);
+  },
+  darker: function(k) {
+    k = k == null ? darker : Math.pow(darker, k);
+    return new Hsl(this.h, this.s, this.l * k, this.opacity);
+  },
+  rgb: function() {
+    var h = this.h % 360 + (this.h < 0) * 360,
+        s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
+        l = this.l,
+        m2 = l + (l < 0.5 ? l : 1 - l) * s,
+        m1 = 2 * l - m2;
+    return new Rgb(
+      hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),
+      hsl2rgb(h, m1, m2),
+      hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),
+      this.opacity
+    );
+  },
+  displayable: function() {
+    return (0 <= this.s && this.s <= 1 || isNaN(this.s))
+        && (0 <= this.l && this.l <= 1)
+        && (0 <= this.opacity && this.opacity <= 1);
+  }
+}));
+
+/* From FvD 13.37, CSS Color Module Level 3 */
+function hsl2rgb(h, m1, m2) {
+  return (h < 60 ? m1 + (m2 - m1) * h / 60
+      : h < 180 ? m2
+      : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60
+      : m1) * 255;
+}
+
+var deg2rad = Math.PI / 180;
+var rad2deg = 180 / Math.PI;
+
+var Kn = 18;
+var Xn = 0.950470;
+var Yn = 1;
+var Zn = 1.088830;
+var t0 = 4 / 29;
+var t1 = 6 / 29;
+var t2 = 3 * t1 * t1;
+var t3 = t1 * t1 * t1;
+
+function labConvert(o) {
+  if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);
+  if (o instanceof Hcl) {
+    var h = o.h * deg2rad;
+    return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);
+  }
+  if (!(o instanceof Rgb)) o = rgbConvert(o);
+  var b = rgb2xyz(o.r),
+      a = rgb2xyz(o.g),
+      l = rgb2xyz(o.b),
+      x = xyz2lab((0.4124564 * b + 0.3575761 * a + 0.1804375 * l) / Xn),
+      y = xyz2lab((0.2126729 * b + 0.7151522 * a + 0.0721750 * l) / Yn),
+      z = xyz2lab((0.0193339 * b + 0.1191920 * a + 0.9503041 * l) / Zn);
+  return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);
+}
+
+function lab(l, a, b, opacity) {
+  return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity);
+}
+
+function Lab(l, a, b, opacity) {
+  this.l = +l;
+  this.a = +a;
+  this.b = +b;
+  this.opacity = +opacity;
+}
+
+define(Lab, lab, extend(Color, {
+  brighter: function(k) {
+    return new Lab(this.l + Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
+  },
+  darker: function(k) {
+    return new Lab(this.l - Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
+  },
+  rgb: function() {
+    var y = (this.l + 16) / 116,
+        x = isNaN(this.a) ? y : y + this.a / 500,
+        z = isNaN(this.b) ? y : y - this.b / 200;
+    y = Yn * lab2xyz(y);
+    x = Xn * lab2xyz(x);
+    z = Zn * lab2xyz(z);
+    return new Rgb(
+      xyz2rgb( 3.2404542 * x - 1.5371385 * y - 0.4985314 * z), // D65 -> sRGB
+      xyz2rgb(-0.9692660 * x + 1.8760108 * y + 0.0415560 * z),
+      xyz2rgb( 0.0556434 * x - 0.2040259 * y + 1.0572252 * z),
+      this.opacity
+    );
+  }
+}));
+
+function xyz2lab(t) {
+  return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0;
+}
+
+function lab2xyz(t) {
+  return t > t1 ? t * t * t : t2 * (t - t0);
+}
+
+function xyz2rgb(x) {
+  return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055);
+}
+
+function rgb2xyz(x) {
+  return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);
+}
+
+function hclConvert(o) {
+  if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);
+  if (!(o instanceof Lab)) o = labConvert(o);
+  var h = Math.atan2(o.b, o.a) * rad2deg;
+  return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);
+}
+
+function hcl(h, c, l, opacity) {
+  return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity);
+}
+
+function Hcl(h, c, l, opacity) {
+  this.h = +h;
+  this.c = +c;
+  this.l = +l;
+  this.opacity = +opacity;
+}
+
+define(Hcl, hcl, extend(Color, {
+  brighter: function(k) {
+    return new Hcl(this.h, this.c, this.l + Kn * (k == null ? 1 : k), this.opacity);
+  },
+  darker: function(k) {
+    return new Hcl(this.h, this.c, this.l - Kn * (k == null ? 1 : k), this.opacity);
+  },
+  rgb: function() {
+    return labConvert(this).rgb();
+  }
+}));
+
+var A = -0.14861;
+var B = +1.78277;
+var C = -0.29227;
+var D = -0.90649;
+var E = +1.97294;
+var ED = E * D;
+var EB = E * B;
+var BC_DA = B * C - D * A;
+
+function cubehelixConvert(o) {
+  if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);
+  if (!(o instanceof Rgb)) o = rgbConvert(o);
+  var r = o.r / 255,
+      g = o.g / 255,
+      b = o.b / 255,
+      l = (BC_DA * b + ED * r - EB * g) / (BC_DA + ED - EB),
+      bl = b - l,
+      k = (E * (g - l) - C * bl) / D,
+      s = Math.sqrt(k * k + bl * bl) / (E * l * (1 - l)), // NaN if l=0 or l=1
+      h = s ? Math.atan2(k, bl) * rad2deg - 120 : NaN;
+  return new Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity);
+}
+
+function cubehelix(h, s, l, opacity) {
+  return arguments.length === 1 ? cubehelixConvert(h) : new Cubehelix(h, s, l, opacity == null ? 1 : opacity);
+}
+
+function Cubehelix(h, s, l, opacity) {
+  this.h = +h;
+  this.s = +s;
+  this.l = +l;
+  this.opacity = +opacity;
+}
+
+define(Cubehelix, cubehelix, extend(Color, {
+  brighter: function(k) {
+    k = k == null ? brighter : Math.pow(brighter, k);
+    return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
+  },
+  darker: function(k) {
+    k = k == null ? darker : Math.pow(darker, k);
+    return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
+  },
+  rgb: function() {
+    var h = isNaN(this.h) ? 0 : (this.h + 120) * deg2rad,
+        l = +this.l,
+        a = isNaN(this.s) ? 0 : this.s * l * (1 - l),
+        cosh = Math.cos(h),
+        sinh = Math.sin(h);
+    return new Rgb(
+      255 * (l + a * (A * cosh + B * sinh)),
+      255 * (l + a * (C * cosh + D * sinh)),
+      255 * (l + a * (E * cosh)),
+      this.opacity
+    );
+  }
+}));
+
+exports.color = color;
+exports.rgb = rgb;
+exports.hsl = hsl;
+exports.lab = lab;
+exports.hcl = hcl;
+exports.cubehelix = cubehelix;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+
+},{}],5:[function(require,module,exports){
+// https://d3js.org/d3-dispatch/ Version 1.0.3. Copyright 2017 Mike Bostock.
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+	typeof define === 'function' && define.amd ? define(['exports'], factory) :
+	(factory((global.d3 = global.d3 || {})));
+}(this, (function (exports) { 'use strict';
+
+var noop = {value: function() {}};
+
+function dispatch() {
+  for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
+    if (!(t = arguments[i] + "") || (t in _)) throw new Error("illegal type: " + t);
+    _[t] = [];
+  }
+  return new Dispatch(_);
+}
+
+function Dispatch(_) {
+  this._ = _;
+}
+
+function parseTypenames(typenames, types) {
+  return typenames.trim().split(/^|\s+/).map(function(t) {
+    var name = "", i = t.indexOf(".");
+    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+    if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
+    return {type: t, name: name};
+  });
+}
+
+Dispatch.prototype = dispatch.prototype = {
+  constructor: Dispatch,
+  on: function(typename, callback) {
+    var _ = this._,
+        T = parseTypenames(typename + "", _),
+        t,
+        i = -1,
+        n = T.length;
+
+    // If no callback was specified, return the callback of the given type and name.
+    if (arguments.length < 2) {
+      while (++i < n) if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t;
+      return;
+    }
+
+    // If a type was specified, set the callback for the given type and name.
+    // Otherwise, if a null callback was specified, remove callbacks of the given name.
+    if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
+    while (++i < n) {
+      if (t = (typename = T[i]).type) _[t] = set(_[t], typename.name, callback);
+      else if (callback == null) for (t in _) _[t] = set(_[t], typename.name, null);
+    }
+
+    return this;
+  },
+  copy: function() {
+    var copy = {}, _ = this._;
+    for (var t in _) copy[t] = _[t].slice();
+    return new Dispatch(copy);
+  },
+  call: function(type, that) {
+    if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];
+    if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
+    for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
+  },
+  apply: function(type, that, args) {
+    if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
+    for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
+  }
+};
+
+function get(type, name) {
+  for (var i = 0, n = type.length, c; i < n; ++i) {
+    if ((c = type[i]).name === name) {
+      return c.value;
+    }
+  }
+}
+
+function set(type, name, callback) {
+  for (var i = 0, n = type.length; i < n; ++i) {
+    if (type[i].name === name) {
+      type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
+      break;
+    }
+  }
+  if (callback != null) type.push({name: name, value: callback});
+  return type;
+}
+
+exports.dispatch = dispatch;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+
+},{}],6:[function(require,module,exports){
+// https://d3js.org/d3-ease/ Version 1.0.3. Copyright 2017 Mike Bostock.
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+	typeof define === 'function' && define.amd ? define(['exports'], factory) :
+	(factory((global.d3 = global.d3 || {})));
+}(this, (function (exports) { 'use strict';
+
+function linear(t) {
+  return +t;
+}
+
+function quadIn(t) {
+  return t * t;
+}
+
+function quadOut(t) {
+  return t * (2 - t);
+}
+
+function quadInOut(t) {
+  return ((t *= 2) <= 1 ? t * t : --t * (2 - t) + 1) / 2;
+}
+
+function cubicIn(t) {
+  return t * t * t;
+}
+
+function cubicOut(t) {
+  return --t * t * t + 1;
+}
+
+function cubicInOut(t) {
+  return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
+}
+
+var exponent = 3;
+
+var polyIn = (function custom(e) {
+  e = +e;
+
+  function polyIn(t) {
+    return Math.pow(t, e);
+  }
+
+  polyIn.exponent = custom;
+
+  return polyIn;
+})(exponent);
+
+var polyOut = (function custom(e) {
+  e = +e;
+
+  function polyOut(t) {
+    return 1 - Math.pow(1 - t, e);
+  }
+
+  polyOut.exponent = custom;
+
+  return polyOut;
+})(exponent);
+
+var polyInOut = (function custom(e) {
+  e = +e;
+
+  function polyInOut(t) {
+    return ((t *= 2) <= 1 ? Math.pow(t, e) : 2 - Math.pow(2 - t, e)) / 2;
+  }
+
+  polyInOut.exponent = custom;
+
+  return polyInOut;
+})(exponent);
+
+var pi = Math.PI;
+var halfPi = pi / 2;
+
+function sinIn(t) {
+  return 1 - Math.cos(t * halfPi);
+}
+
+function sinOut(t) {
+  return Math.sin(t * halfPi);
+}
+
+function sinInOut(t) {
+  return (1 - Math.cos(pi * t)) / 2;
+}
+
+function expIn(t) {
+  return Math.pow(2, 10 * t - 10);
+}
+
+function expOut(t) {
+  return 1 - Math.pow(2, -10 * t);
+}
+
+function expInOut(t) {
+  return ((t *= 2) <= 1 ? Math.pow(2, 10 * t - 10) : 2 - Math.pow(2, 10 - 10 * t)) / 2;
+}
+
+function circleIn(t) {
+  return 1 - Math.sqrt(1 - t * t);
+}
+
+function circleOut(t) {
+  return Math.sqrt(1 - --t * t);
+}
+
+function circleInOut(t) {
+  return ((t *= 2) <= 1 ? 1 - Math.sqrt(1 - t * t) : Math.sqrt(1 - (t -= 2) * t) + 1) / 2;
+}
+
+var b1 = 4 / 11;
+var b2 = 6 / 11;
+var b3 = 8 / 11;
+var b4 = 3 / 4;
+var b5 = 9 / 11;
+var b6 = 10 / 11;
+var b7 = 15 / 16;
+var b8 = 21 / 22;
+var b9 = 63 / 64;
+var b0 = 1 / b1 / b1;
+
+function bounceIn(t) {
+  return 1 - bounceOut(1 - t);
+}
+
+function bounceOut(t) {
+  return (t = +t) < b1 ? b0 * t * t : t < b3 ? b0 * (t -= b2) * t + b4 : t < b6 ? b0 * (t -= b5) * t + b7 : b0 * (t -= b8) * t + b9;
+}
+
+function bounceInOut(t) {
+  return ((t *= 2) <= 1 ? 1 - bounceOut(1 - t) : bounceOut(t - 1) + 1) / 2;
+}
+
+var overshoot = 1.70158;
+
+var backIn = (function custom(s) {
+  s = +s;
+
+  function backIn(t) {
+    return t * t * ((s + 1) * t - s);
+  }
+
+  backIn.overshoot = custom;
+
+  return backIn;
+})(overshoot);
+
+var backOut = (function custom(s) {
+  s = +s;
+
+  function backOut(t) {
+    return --t * t * ((s + 1) * t + s) + 1;
+  }
+
+  backOut.overshoot = custom;
+
+  return backOut;
+})(overshoot);
+
+var backInOut = (function custom(s) {
+  s = +s;
+
+  function backInOut(t) {
+    return ((t *= 2) < 1 ? t * t * ((s + 1) * t - s) : (t -= 2) * t * ((s + 1) * t + s) + 2) / 2;
+  }
+
+  backInOut.overshoot = custom;
+
+  return backInOut;
+})(overshoot);
+
+var tau = 2 * Math.PI;
+var amplitude = 1;
+var period = 0.3;
+
+var elasticIn = (function custom(a, p) {
+  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);
+
+  function elasticIn(t) {
+    return a * Math.pow(2, 10 * --t) * Math.sin((s - t) / p);
+  }
+
+  elasticIn.amplitude = function(a) { return custom(a, p * tau); };
+  elasticIn.period = function(p) { return custom(a, p); };
+
+  return elasticIn;
+})(amplitude, period);
+
+var elasticOut = (function custom(a, p) {
+  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);
+
+  function elasticOut(t) {
+    return 1 - a * Math.pow(2, -10 * (t = +t)) * Math.sin((t + s) / p);
+  }
+
+  elasticOut.amplitude = function(a) { return custom(a, p * tau); };
+  elasticOut.period = function(p) { return custom(a, p); };
+
+  return elasticOut;
+})(amplitude, period);
+
+var elasticInOut = (function custom(a, p) {
+  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);
+
+  function elasticInOut(t) {
+    return ((t = t * 2 - 1) < 0
+        ? a * Math.pow(2, 10 * t) * Math.sin((s - t) / p)
+        : 2 - a * Math.pow(2, -10 * t) * Math.sin((s + t) / p)) / 2;
+  }
+
+  elasticInOut.amplitude = function(a) { return custom(a, p * tau); };
+  elasticInOut.period = function(p) { return custom(a, p); };
+
+  return elasticInOut;
+})(amplitude, period);
+
+exports.easeLinear = linear;
+exports.easeQuad = quadInOut;
+exports.easeQuadIn = quadIn;
+exports.easeQuadOut = quadOut;
+exports.easeQuadInOut = quadInOut;
+exports.easeCubic = cubicInOut;
+exports.easeCubicIn = cubicIn;
+exports.easeCubicOut = cubicOut;
+exports.easeCubicInOut = cubicInOut;
+exports.easePoly = polyInOut;
+exports.easePolyIn = polyIn;
+exports.easePolyOut = polyOut;
+exports.easePolyInOut = polyInOut;
+exports.easeSin = sinInOut;
+exports.easeSinIn = sinIn;
+exports.easeSinOut = sinOut;
+exports.easeSinInOut = sinInOut;
+exports.easeExp = expInOut;
+exports.easeExpIn = expIn;
+exports.easeExpOut = expOut;
+exports.easeExpInOut = expInOut;
+exports.easeCircle = circleInOut;
+exports.easeCircleIn = circleIn;
+exports.easeCircleOut = circleOut;
+exports.easeCircleInOut = circleInOut;
+exports.easeBounce = bounceOut;
+exports.easeBounceIn = bounceIn;
+exports.easeBounceOut = bounceOut;
+exports.easeBounceInOut = bounceInOut;
+exports.easeBack = backInOut;
+exports.easeBackIn = backIn;
+exports.easeBackOut = backOut;
+exports.easeBackInOut = backInOut;
+exports.easeElastic = elasticOut;
+exports.easeElasticIn = elasticIn;
+exports.easeElasticOut = elasticOut;
+exports.easeElasticInOut = elasticInOut;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+
+},{}],7:[function(require,module,exports){
+// https://d3js.org/d3-format/ Version 1.2.0. Copyright 2017 Mike Bostock.
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+	typeof define === 'function' && define.amd ? define(['exports'], factory) :
+	(factory((global.d3 = global.d3 || {})));
+}(this, (function (exports) { 'use strict';
+
+// Computes the decimal coefficient and exponent of the specified number x with
+// significant digits p, where x is positive and p is in [1, 21] or undefined.
+// For example, formatDecimal(1.23) returns ["123", 0].
+var formatDecimal = function(x, p) {
+  if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
+  var i, coefficient = x.slice(0, i);
+
+  // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
+  // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
+  return [
+    coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient,
+    +x.slice(i + 1)
+  ];
+};
+
+var exponent = function(x) {
+  return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN;
+};
+
+var formatGroup = function(grouping, thousands) {
+  return function(value, width) {
+    var i = value.length,
+        t = [],
+        j = 0,
+        g = grouping[0],
+        length = 0;
+
+    while (i > 0 && g > 0) {
+      if (length + g + 1 > width) g = Math.max(1, width - length);
+      t.push(value.substring(i -= g, i + g));
+      if ((length += g + 1) > width) break;
+      g = grouping[j = (j + 1) % grouping.length];
+    }
+
+    return t.reverse().join(thousands);
+  };
+};
+
+var formatNumerals = function(numerals) {
+  return function(value) {
+    return value.replace(/[0-9]/g, function(i) {
+      return numerals[+i];
+    });
+  };
+};
+
+var formatDefault = function(x, p) {
+  x = x.toPrecision(p);
+
+  out: for (var n = x.length, i = 1, i0 = -1, i1; i < n; ++i) {
+    switch (x[i]) {
+      case ".": i0 = i1 = i; break;
+      case "0": if (i0 === 0) i0 = i; i1 = i; break;
+      case "e": break out;
+      default: if (i0 > 0) i0 = 0; break;
+    }
+  }
+
+  return i0 > 0 ? x.slice(0, i0) + x.slice(i1 + 1) : x;
+};
+
+var prefixExponent;
+
+var formatPrefixAuto = function(x, p) {
+  var d = formatDecimal(x, p);
+  if (!d) return x + "";
+  var coefficient = d[0],
+      exponent = d[1],
+      i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
+      n = coefficient.length;
+  return i === n ? coefficient
+      : i > n ? coefficient + new Array(i - n + 1).join("0")
+      : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i)
+      : "0." + new Array(1 - i).join("0") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y!
+};
+
+var formatRounded = function(x, p) {
+  var d = formatDecimal(x, p);
+  if (!d) return x + "";
+  var coefficient = d[0],
+      exponent = d[1];
+  return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient
+      : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1)
+      : coefficient + new Array(exponent - coefficient.length + 2).join("0");
+};
+
+var formatTypes = {
+  "": formatDefault,
+  "%": function(x, p) { return (x * 100).toFixed(p); },
+  "b": function(x) { return Math.round(x).toString(2); },
+  "c": function(x) { return x + ""; },
+  "d": function(x) { return Math.round(x).toString(10); },
+  "e": function(x, p) { return x.toExponential(p); },
+  "f": function(x, p) { return x.toFixed(p); },
+  "g": function(x, p) { return x.toPrecision(p); },
+  "o": function(x) { return Math.round(x).toString(8); },
+  "p": function(x, p) { return formatRounded(x * 100, p); },
+  "r": formatRounded,
+  "s": formatPrefixAuto,
+  "X": function(x) { return Math.round(x).toString(16).toUpperCase(); },
+  "x": function(x) { return Math.round(x).toString(16); }
+};
+
+// [[fill]align][sign][symbol][0][width][,][.precision][type]
+var re = /^(?:(.)?([<>=^]))?([+\-\( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?([a-z%])?$/i;
+
+function formatSpecifier(specifier) {
+  return new FormatSpecifier(specifier);
+}
+
+formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
+
+function FormatSpecifier(specifier) {
+  if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
+
+  var match,
+      fill = match[1] || " ",
+      align = match[2] || ">",
+      sign = match[3] || "-",
+      symbol = match[4] || "",
+      zero = !!match[5],
+      width = match[6] && +match[6],
+      comma = !!match[7],
+      precision = match[8] && +match[8].slice(1),
+      type = match[9] || "";
+
+  // The "n" type is an alias for ",g".
+  if (type === "n") comma = true, type = "g";
+
+  // Map invalid types to the default format.
+  else if (!formatTypes[type]) type = "";
+
+  // If zero fill is specified, padding goes after sign and before digits.
+  if (zero || (fill === "0" && align === "=")) zero = true, fill = "0", align = "=";
+
+  this.fill = fill;
+  this.align = align;
+  this.sign = sign;
+  this.symbol = symbol;
+  this.zero = zero;
+  this.width = width;
+  this.comma = comma;
+  this.precision = precision;
+  this.type = type;
+}
+
+FormatSpecifier.prototype.toString = function() {
+  return this.fill
+      + this.align
+      + this.sign
+      + this.symbol
+      + (this.zero ? "0" : "")
+      + (this.width == null ? "" : Math.max(1, this.width | 0))
+      + (this.comma ? "," : "")
+      + (this.precision == null ? "" : "." + Math.max(0, this.precision | 0))
+      + this.type;
+};
+
+var identity = function(x) {
+  return x;
+};
+
+var prefixes = ["y","z","a","f","p","n","µ","m","","k","M","G","T","P","E","Z","Y"];
+
+var formatLocale = function(locale) {
+  var group = locale.grouping && locale.thousands ? formatGroup(locale.grouping, locale.thousands) : identity,
+      currency = locale.currency,
+      decimal = locale.decimal,
+      numerals = locale.numerals ? formatNumerals(locale.numerals) : identity,
+      percent = locale.percent || "%";
+
+  function newFormat(specifier) {
+    specifier = formatSpecifier(specifier);
+
+    var fill = specifier.fill,
+        align = specifier.align,
+        sign = specifier.sign,
+        symbol = specifier.symbol,
+        zero = specifier.zero,
+        width = specifier.width,
+        comma = specifier.comma,
+        precision = specifier.precision,
+        type = specifier.type;
+
+    // Compute the prefix and suffix.
+    // For SI-prefix, the suffix is lazily computed.
+    var prefix = symbol === "$" ? currency[0] : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
+        suffix = symbol === "$" ? currency[1] : /[%p]/.test(type) ? percent : "";
+
+    // What format function should we use?
+    // Is this an integer type?
+    // Can this type generate exponential notation?
+    var formatType = formatTypes[type],
+        maybeSuffix = !type || /[defgprs%]/.test(type);
+
+    // Set the default precision if not specified,
+    // or clamp the specified precision to the supported range.
+    // For significant precision, it must be in [1, 21].
+    // For fixed precision, it must be in [0, 20].
+    precision = precision == null ? (type ? 6 : 12)
+        : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))
+        : Math.max(0, Math.min(20, precision));
+
+    function format(value) {
+      var valuePrefix = prefix,
+          valueSuffix = suffix,
+          i, n, c;
+
+      if (type === "c") {
+        valueSuffix = formatType(value) + valueSuffix;
+        value = "";
+      } else {
+        value = +value;
+
+        // Perform the initial formatting.
+        var valueNegative = value < 0;
+        value = formatType(Math.abs(value), precision);
+
+        // If a negative value rounds to zero during formatting, treat as positive.
+        if (valueNegative && +value === 0) valueNegative = false;
+
+        // Compute the prefix and suffix.
+        valuePrefix = (valueNegative ? (sign === "(" ? sign : "-") : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
+        valueSuffix = valueSuffix + (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + (valueNegative && sign === "(" ? ")" : "");
+
+        // Break the formatted value into the integer “value” part that can be
+        // grouped, and fractional or exponential “suffix” part that is not.
+        if (maybeSuffix) {
+          i = -1, n = value.length;
+          while (++i < n) {
+            if (c = value.charCodeAt(i), 48 > c || c > 57) {
+              valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
+              value = value.slice(0, i);
+              break;
+            }
+          }
+        }
+      }
+
+      // If the fill character is not "0", grouping is applied before padding.
+      if (comma && !zero) value = group(value, Infinity);
+
+      // Compute the padding.
+      var length = valuePrefix.length + value.length + valueSuffix.length,
+          padding = length < width ? new Array(width - length + 1).join(fill) : "";
+
+      // If the fill character is "0", grouping is applied after padding.
+      if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = "";
+
+      // Reconstruct the final output based on the desired alignment.
+      switch (align) {
+        case "<": value = valuePrefix + value + valueSuffix + padding; break;
+        case "=": value = valuePrefix + padding + value + valueSuffix; break;
+        case "^": value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length); break;
+        default: value = padding + valuePrefix + value + valueSuffix; break;
+      }
+
+      return numerals(value);
+    }
+
+    format.toString = function() {
+      return specifier + "";
+    };
+
+    return format;
+  }
+
+  function formatPrefix(specifier, value) {
+    var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
+        e = Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3,
+        k = Math.pow(10, -e),
+        prefix = prefixes[8 + e / 3];
+    return function(value) {
+      return f(k * value) + prefix;
+    };
+  }
+
+  return {
+    format: newFormat,
+    formatPrefix: formatPrefix
+  };
+};
+
+var locale;
+
+
+
+defaultLocale({
+  decimal: ".",
+  thousands: ",",
+  grouping: [3],
+  currency: ["$", ""]
+});
+
+function defaultLocale(definition) {
+  locale = formatLocale(definition);
+  exports.format = locale.format;
+  exports.formatPrefix = locale.formatPrefix;
+  return locale;
+}
+
+var precisionFixed = function(step) {
+  return Math.max(0, -exponent(Math.abs(step)));
+};
+
+var precisionPrefix = function(step, value) {
+  return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));
+};
+
+var precisionRound = function(step, max) {
+  step = Math.abs(step), max = Math.abs(max) - step;
+  return Math.max(0, exponent(max) - exponent(step)) + 1;
+};
+
+exports.formatDefaultLocale = defaultLocale;
+exports.formatLocale = formatLocale;
+exports.formatSpecifier = formatSpecifier;
+exports.precisionFixed = precisionFixed;
+exports.precisionPrefix = precisionPrefix;
+exports.precisionRound = precisionRound;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+
+},{}],8:[function(require,module,exports){
+// https://d3js.org/d3-hierarchy/ Version 1.1.5. Copyright 2017 Mike Bostock.
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+	typeof define === 'function' && define.amd ? define(['exports'], factory) :
+	(factory((global.d3 = global.d3 || {})));
+}(this, (function (exports) { 'use strict';
+
+function defaultSeparation(a, b) {
+  return a.parent === b.parent ? 1 : 2;
+}
+
+function meanX(children) {
+  return children.reduce(meanXReduce, 0) / children.length;
+}
+
+function meanXReduce(x, c) {
+  return x + c.x;
+}
+
+function maxY(children) {
+  return 1 + children.reduce(maxYReduce, 0);
+}
+
+function maxYReduce(y, c) {
+  return Math.max(y, c.y);
+}
+
+function leafLeft(node) {
+  var children;
+  while (children = node.children) node = children[0];
+  return node;
+}
+
+function leafRight(node) {
+  var children;
+  while (children = node.children) node = children[children.length - 1];
+  return node;
+}
+
+var cluster = function() {
+  var separation = defaultSeparation,
+      dx = 1,
+      dy = 1,
+      nodeSize = false;
+
+  function cluster(root) {
+    var previousNode,
+        x = 0;
+
+    // First walk, computing the initial x & y values.
+    root.eachAfter(function(node) {
+      var children = node.children;
+      if (children) {
+        node.x = meanX(children);
+        node.y = maxY(children);
+      } else {
+        node.x = previousNode ? x += separation(node, previousNode) : 0;
+        node.y = 0;
+        previousNode = node;
+      }
+    });
+
+    var left = leafLeft(root),
+        right = leafRight(root),
+        x0 = left.x - separation(left, right) / 2,
+        x1 = right.x + separation(right, left) / 2;
+
+    // Second walk, normalizing x & y to the desired size.
+    return root.eachAfter(nodeSize ? function(node) {
+      node.x = (node.x - root.x) * dx;
+      node.y = (root.y - node.y) * dy;
+    } : function(node) {
+      node.x = (node.x - x0) / (x1 - x0) * dx;
+      node.y = (1 - (root.y ? node.y / root.y : 1)) * dy;
+    });
+  }
+
+  cluster.separation = function(x) {
+    return arguments.length ? (separation = x, cluster) : separation;
+  };
+
+  cluster.size = function(x) {
+    return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? null : [dx, dy]);
+  };
+
+  cluster.nodeSize = function(x) {
+    return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? [dx, dy] : null);
+  };
+
+  return cluster;
+};
+
+function count(node) {
+  var sum = 0,
+      children = node.children,
+      i = children && children.length;
+  if (!i) sum = 1;
+  else while (--i >= 0) sum += children[i].value;
+  node.value = sum;
+}
+
+var node_count = function() {
+  return this.eachAfter(count);
+};
+
+var node_each = function(callback) {
+  var node = this, current, next = [node], children, i, n;
+  do {
+    current = next.reverse(), next = [];
+    while (node = current.pop()) {
+      callback(node), children = node.children;
+      if (children) for (i = 0, n = children.length; i < n; ++i) {
+        next.push(children[i]);
+      }
+    }
+  } while (next.length);
+  return this;
+};
+
+var node_eachBefore = function(callback) {
+  var node = this, nodes = [node], children, i;
+  while (node = nodes.pop()) {
+    callback(node), children = node.children;
+    if (children) for (i = children.length - 1; i >= 0; --i) {
+      nodes.push(children[i]);
+    }
+  }
+  return this;
+};
+
+var node_eachAfter = function(callback) {
+  var node = this, nodes = [node], next = [], children, i, n;
+  while (node = nodes.pop()) {
+    next.push(node), children = node.children;
+    if (children) for (i = 0, n = children.length; i < n; ++i) {
+      nodes.push(children[i]);
+    }
+  }
+  while (node = next.pop()) {
+    callback(node);
+  }
+  return this;
+};
+
+var node_sum = function(value) {
+  return this.eachAfter(function(node) {
+    var sum = +value(node.data) || 0,
+        children = node.children,
+        i = children && children.length;
+    while (--i >= 0) sum += children[i].value;
+    node.value = sum;
+  });
+};
+
+var node_sort = function(compare) {
+  return this.eachBefore(function(node) {
+    if (node.children) {
+      node.children.sort(compare);
+    }
+  });
+};
+
+var node_path = function(end) {
+  var start = this,
+      ancestor = leastCommonAncestor(start, end),
+      nodes = [start];
+  while (start !== ancestor) {
+    start = start.parent;
+    nodes.push(start);
+  }
+  var k = nodes.length;
+  while (end !== ancestor) {
+    nodes.splice(k, 0, end);
+    end = end.parent;
+  }
+  return nodes;
+};
+
+function leastCommonAncestor(a, b) {
+  if (a === b) return a;
+  var aNodes = a.ancestors(),
+      bNodes = b.ancestors(),
+      c = null;
+  a = aNodes.pop();
+  b = bNodes.pop();
+  while (a === b) {
+    c = a;
+    a = aNodes.pop();
+    b = bNodes.pop();
+  }
+  return c;
+}
+
+var node_ancestors = function() {
+  var node = this, nodes = [node];
+  while (node = node.parent) {
+    nodes.push(node);
+  }
+  return nodes;
+};
+
+var node_descendants = function() {
+  var nodes = [];
+  this.each(function(node) {
+    nodes.push(node);
+  });
+  return nodes;
+};
+
+var node_leaves = function() {
+  var leaves = [];
+  this.eachBefore(function(node) {
+    if (!node.children) {
+      leaves.push(node);
+    }
+  });
+  return leaves;
+};
+
+var node_links = function() {
+  var root = this, links = [];
+  root.each(function(node) {
+    if (node !== root) { // Don’t include the root’s parent, if any.
+      links.push({source: node.parent, target: node});
+    }
+  });
+  return links;
+};
+
+function hierarchy(data, children) {
+  var root = new Node(data),
+      valued = +data.value && (root.value = data.value),
+      node,
+      nodes = [root],
+      child,
+      childs,
+      i,
+      n;
+
+  if (children == null) children = defaultChildren;
+
+  while (node = nodes.pop()) {
+    if (valued) node.value = +node.data.value;
+    if ((childs = children(node.data)) && (n = childs.length)) {
+      node.children = new Array(n);
+      for (i = n - 1; i >= 0; --i) {
+        nodes.push(child = node.children[i] = new Node(childs[i]));
+        child.parent = node;
+        child.depth = node.depth + 1;
+      }
+    }
+  }
+
+  return root.eachBefore(computeHeight);
+}
+
+function node_copy() {
+  return hierarchy(this).eachBefore(copyData);
+}
+
+function defaultChildren(d) {
+  return d.children;
+}
+
+function copyData(node) {
+  node.data = node.data.data;
+}
+
+function computeHeight(node) {
+  var height = 0;
+  do node.height = height;
+  while ((node = node.parent) && (node.height < ++height));
+}
+
+function Node(data) {
+  this.data = data;
+  this.depth =
+  this.height = 0;
+  this.parent = null;
+}
+
+Node.prototype = hierarchy.prototype = {
+  constructor: Node,
+  count: node_count,
+  each: node_each,
+  eachAfter: node_eachAfter,
+  eachBefore: node_eachBefore,
+  sum: node_sum,
+  sort: node_sort,
+  path: node_path,
+  ancestors: node_ancestors,
+  descendants: node_descendants,
+  leaves: node_leaves,
+  links: node_links,
+  copy: node_copy
+};
+
+var slice = Array.prototype.slice;
+
+function shuffle(array) {
+  var m = array.length,
+      t,
+      i;
+
+  while (m) {
+    i = Math.random() * m-- | 0;
+    t = array[m];
+    array[m] = array[i];
+    array[i] = t;
+  }
+
+  return array;
+}
+
+var enclose = function(circles) {
+  var i = 0, n = (circles = shuffle(slice.call(circles))).length, B = [], p, e;
+
+  while (i < n) {
+    p = circles[i];
+    if (e && enclosesWeak(e, p)) ++i;
+    else e = encloseBasis(B = extendBasis(B, p)), i = 0;
+  }
+
+  return e;
+};
+
+function extendBasis(B, p) {
+  var i, j;
+
+  if (enclosesWeakAll(p, B)) return [p];
+
+  // If we get here then B must have at least one element.
+  for (i = 0; i < B.length; ++i) {
+    if (enclosesNot(p, B[i])
+        && enclosesWeakAll(encloseBasis2(B[i], p), B)) {
+      return [B[i], p];
+    }
+  }
+
+  // If we get here then B must have at least two elements.
+  for (i = 0; i < B.length - 1; ++i) {
+    for (j = i + 1; j < B.length; ++j) {
+      if (enclosesNot(encloseBasis2(B[i], B[j]), p)
+          && enclosesNot(encloseBasis2(B[i], p), B[j])
+          && enclosesNot(encloseBasis2(B[j], p), B[i])
+          && enclosesWeakAll(encloseBasis3(B[i], B[j], p), B)) {
+        return [B[i], B[j], p];
+      }
+    }
+  }
+
+  // If we get here then something is very wrong.
+  throw new Error;
+}
+
+function enclosesNot(a, b) {
+  var dr = a.r - b.r, dx = b.x - a.x, dy = b.y - a.y;
+  return dr < 0 || dr * dr < dx * dx + dy * dy;
+}
+
+function enclosesWeak(a, b) {
+  var dr = a.r - b.r + 1e-6, dx = b.x - a.x, dy = b.y - a.y;
+  return dr > 0 && dr * dr > dx * dx + dy * dy;
+}
+
+function enclosesWeakAll(a, B) {
+  for (var i = 0; i < B.length; ++i) {
+    if (!enclosesWeak(a, B[i])) {
+      return false;
+    }
+  }
+  return true;
+}
+
+function encloseBasis(B) {
+  switch (B.length) {
+    case 1: return encloseBasis1(B[0]);
+    case 2: return encloseBasis2(B[0], B[1]);
+    case 3: return encloseBasis3(B[0], B[1], B[2]);
+  }
+}
+
+function encloseBasis1(a) {
+  return {
+    x: a.x,
+    y: a.y,
+    r: a.r
+  };
+}
+
+function encloseBasis2(a, b) {
+  var x1 = a.x, y1 = a.y, r1 = a.r,
+      x2 = b.x, y2 = b.y, r2 = b.r,
+      x21 = x2 - x1, y21 = y2 - y1, r21 = r2 - r1,
+      l = Math.sqrt(x21 * x21 + y21 * y21);
+  return {
+    x: (x1 + x2 + x21 / l * r21) / 2,
+    y: (y1 + y2 + y21 / l * r21) / 2,
+    r: (l + r1 + r2) / 2
+  };
+}
+
+function encloseBasis3(a, b, c) {
+  var x1 = a.x, y1 = a.y, r1 = a.r,
+      x2 = b.x, y2 = b.y, r2 = b.r,
+      x3 = c.x, y3 = c.y, r3 = c.r,
+      a2 = x1 - x2,
+      a3 = x1 - x3,
+      b2 = y1 - y2,
+      b3 = y1 - y3,
+      c2 = r2 - r1,
+      c3 = r3 - r1,
+      d1 = x1 * x1 + y1 * y1 - r1 * r1,
+      d2 = d1 - x2 * x2 - y2 * y2 + r2 * r2,
+      d3 = d1 - x3 * x3 - y3 * y3 + r3 * r3,
+      ab = a3 * b2 - a2 * b3,
+      xa = (b2 * d3 - b3 * d2) / (ab * 2) - x1,
+      xb = (b3 * c2 - b2 * c3) / ab,
+      ya = (a3 * d2 - a2 * d3) / (ab * 2) - y1,
+      yb = (a2 * c3 - a3 * c2) / ab,
+      A = xb * xb + yb * yb - 1,
+      B = 2 * (r1 + xa * xb + ya * yb),
+      C = xa * xa + ya * ya - r1 * r1,
+      r = -(A ? (B + Math.sqrt(B * B - 4 * A * C)) / (2 * A) : C / B);
+  return {
+    x: x1 + xa + xb * r,
+    y: y1 + ya + yb * r,
+    r: r
+  };
+}
+
+function place(a, b, c) {
+  var ax = a.x,
+      ay = a.y,
+      da = b.r + c.r,
+      db = a.r + c.r,
+      dx = b.x - ax,
+      dy = b.y - ay,
+      dc = dx * dx + dy * dy;
+  if (dc) {
+    var x = 0.5 + ((db *= db) - (da *= da)) / (2 * dc),
+        y = Math.sqrt(Math.max(0, 2 * da * (db + dc) - (db -= dc) * db - da * da)) / (2 * dc);
+    c.x = ax + x * dx + y * dy;
+    c.y = ay + x * dy - y * dx;
+  } else {
+    c.x = ax + db;
+    c.y = ay;
+  }
+}
+
+function intersects(a, b) {
+  var dx = b.x - a.x,
+      dy = b.y - a.y,
+      dr = a.r + b.r;
+  return dr * dr - 1e-6 > dx * dx + dy * dy;
+}
+
+function score(node) {
+  var a = node._,
+      b = node.next._,
+      ab = a.r + b.r,
+      dx = (a.x * b.r + b.x * a.r) / ab,
+      dy = (a.y * b.r + b.y * a.r) / ab;
+  return dx * dx + dy * dy;
+}
+
+function Node$1(circle) {
+  this._ = circle;
+  this.next = null;
+  this.previous = null;
+}
+
+function packEnclose(circles) {
+  if (!(n = circles.length)) return 0;
+
+  var a, b, c, n, aa, ca, i, j, k, sj, sk;
+
+  // Place the first circle.
+  a = circles[0], a.x = 0, a.y = 0;
+  if (!(n > 1)) return a.r;
+
+  // Place the second circle.
+  b = circles[1], a.x = -b.r, b.x = a.r, b.y = 0;
+  if (!(n > 2)) return a.r + b.r;
+
+  // Place the third circle.
+  place(b, a, c = circles[2]);
+
+  // Initialize the front-chain using the first three circles a, b and c.
+  a = new Node$1(a), b = new Node$1(b), c = new Node$1(c);
+  a.next = c.previous = b;
+  b.next = a.previous = c;
+  c.next = b.previous = a;
+
+  // Attempt to place each remaining circle…
+  pack: for (i = 3; i < n; ++i) {
+    place(a._, b._, c = circles[i]), c = new Node$1(c);
+
+    // Find the closest intersecting circle on the front-chain, if any.
+    // “Closeness” is determined by linear distance along the front-chain.
+    // “Ahead” or “behind” is likewise determined by linear distance.
+    j = b.next, k = a.previous, sj = b._.r, sk = a._.r;
+    do {
+      if (sj <= sk) {
+        if (intersects(j._, c._)) {
+          b = j, a.next = b, b.previous = a, --i;
+          continue pack;
+        }
+        sj += j._.r, j = j.next;
+      } else {
+        if (intersects(k._, c._)) {
+          a = k, a.next = b, b.previous = a, --i;
+          continue pack;
+        }
+        sk += k._.r, k = k.previous;
+      }
+    } while (j !== k.next);
+
+    // Success! Insert the new circle c between a and b.
+    c.previous = a, c.next = b, a.next = b.previous = b = c;
+
+    // Compute the new closest circle pair to the centroid.
+    aa = score(a);
+    while ((c = c.next) !== b) {
+      if ((ca = score(c)) < aa) {
+        a = c, aa = ca;
+      }
+    }
+    b = a.next;
+  }
+
+  // Compute the enclosing circle of the front chain.
+  a = [b._], c = b; while ((c = c.next) !== b) a.push(c._); c = enclose(a);
+
+  // Translate the circles to put the enclosing circle around the origin.
+  for (i = 0; i < n; ++i) a = circles[i], a.x -= c.x, a.y -= c.y;
+
+  return c.r;
+}
+
+var siblings = function(circles) {
+  packEnclose(circles);
+  return circles;
+};
+
+function optional(f) {
+  return f == null ? null : required(f);
+}
+
+function required(f) {
+  if (typeof f !== "function") throw new Error;
+  return f;
+}
+
+function constantZero() {
+  return 0;
+}
+
+var constant = function(x) {
+  return function() {
+    return x;
+  };
+};
+
+function defaultRadius(d) {
+  return Math.sqrt(d.value);
+}
+
+var index = function() {
+  var radius = null,
+      dx = 1,
+      dy = 1,
+      padding = constantZero;
+
+  function pack(root) {
+    root.x = dx / 2, root.y = dy / 2;
+    if (radius) {
+      root.eachBefore(radiusLeaf(radius))
+          .eachAfter(packChildren(padding, 0.5))
+          .eachBefore(translateChild(1));
+    } else {
+      root.eachBefore(radiusLeaf(defaultRadius))
+          .eachAfter(packChildren(constantZero, 1))
+          .eachAfter(packChildren(padding, root.r / Math.min(dx, dy)))
+          .eachBefore(translateChild(Math.min(dx, dy) / (2 * root.r)));
+    }
+    return root;
+  }
+
+  pack.radius = function(x) {
+    return arguments.length ? (radius = optional(x), pack) : radius;
+  };
+
+  pack.size = function(x) {
+    return arguments.length ? (dx = +x[0], dy = +x[1], pack) : [dx, dy];
+  };
+
+  pack.padding = function(x) {
+    return arguments.length ? (padding = typeof x === "function" ? x : constant(+x), pack) : padding;
+  };
+
+  return pack;
+};
+
+function radiusLeaf(radius) {
+  return function(node) {
+    if (!node.children) {
+      node.r = Math.max(0, +radius(node) || 0);
+    }
+  };
+}
+
+function packChildren(padding, k) {
+  return function(node) {
+    if (children = node.children) {
+      var children,
+          i,
+          n = children.length,
+          r = padding(node) * k || 0,
+          e;
+
+      if (r) for (i = 0; i < n; ++i) children[i].r += r;
+      e = packEnclose(children);
+      if (r) for (i = 0; i < n; ++i) children[i].r -= r;
+      node.r = e + r;
+    }
+  };
+}
+
+function translateChild(k) {
+  return function(node) {
+    var parent = node.parent;
+    node.r *= k;
+    if (parent) {
+      node.x = parent.x + k * node.x;
+      node.y = parent.y + k * node.y;
+    }
+  };
+}
+
+var roundNode = function(node) {
+  node.x0 = Math.round(node.x0);
+  node.y0 = Math.round(node.y0);
+  node.x1 = Math.round(node.x1);
+  node.y1 = Math.round(node.y1);
+};
+
+var treemapDice = function(parent, x0, y0, x1, y1) {
+  var nodes = parent.children,
+      node,
+      i = -1,
+      n = nodes.length,
+      k = parent.value && (x1 - x0) / parent.value;
+
+  while (++i < n) {
+    node = nodes[i], node.y0 = y0, node.y1 = y1;
+    node.x0 = x0, node.x1 = x0 += node.value * k;
+  }
+};
+
+var partition = function() {
+  var dx = 1,
+      dy = 1,
+      padding = 0,
+      round = false;
+
+  function partition(root) {
+    var n = root.height + 1;
+    root.x0 =
+    root.y0 = padding;
+    root.x1 = dx;
+    root.y1 = dy / n;
+    root.eachBefore(positionNode(dy, n));
+    if (round) root.eachBefore(roundNode);
+    return root;
+  }
+
+  function positionNode(dy, n) {
+    return function(node) {
+      if (node.children) {
+        treemapDice(node, node.x0, dy * (node.depth + 1) / n, node.x1, dy * (node.depth + 2) / n);
+      }
+      var x0 = node.x0,
+          y0 = node.y0,
+          x1 = node.x1 - padding,
+          y1 = node.y1 - padding;
+      if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
+      if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
+      node.x0 = x0;
+      node.y0 = y0;
+      node.x1 = x1;
+      node.y1 = y1;
+    };
+  }
+
+  partition.round = function(x) {
+    return arguments.length ? (round = !!x, partition) : round;
+  };
+
+  partition.size = function(x) {
+    return arguments.length ? (dx = +x[0], dy = +x[1], partition) : [dx, dy];
+  };
+
+  partition.padding = function(x) {
+    return arguments.length ? (padding = +x, partition) : padding;
+  };
+
+  return partition;
+};
+
+var keyPrefix = "$";
+var preroot = {depth: -1};
+var ambiguous = {};
+
+function defaultId(d) {
+  return d.id;
+}
+
+function defaultParentId(d) {
+  return d.parentId;
+}
+
+var stratify = function() {
+  var id = defaultId,
+      parentId = defaultParentId;
+
+  function stratify(data) {
+    var d,
+        i,
+        n = data.length,
+        root,
+        parent,
+        node,
+        nodes = new Array(n),
+        nodeId,
+        nodeKey,
+        nodeByKey = {};
+
+    for (i = 0; i < n; ++i) {
+      d = data[i], node = nodes[i] = new Node(d);
+      if ((nodeId = id(d, i, data)) != null && (nodeId += "")) {
+        nodeKey = keyPrefix + (node.id = nodeId);
+        nodeByKey[nodeKey] = nodeKey in nodeByKey ? ambiguous : node;
+      }
+    }
+
+    for (i = 0; i < n; ++i) {
+      node = nodes[i], nodeId = parentId(data[i], i, data);
+      if (nodeId == null || !(nodeId += "")) {
+        if (root) throw new Error("multiple roots");
+        root = node;
+      } else {
+        parent = nodeByKey[keyPrefix + nodeId];
+        if (!parent) throw new Error("missing: " + nodeId);
+        if (parent === ambiguous) throw new Error("ambiguous: " + nodeId);
+        if (parent.children) parent.children.push(node);
+        else parent.children = [node];
+        node.parent = parent;
+      }
+    }
+
+    if (!root) throw new Error("no root");
+    root.parent = preroot;
+    root.eachBefore(function(node) { node.depth = node.parent.depth + 1; --n; }).eachBefore(computeHeight);
+    root.parent = null;
+    if (n > 0) throw new Error("cycle");
+
+    return root;
+  }
+
+  stratify.id = function(x) {
+    return arguments.length ? (id = required(x), stratify) : id;
+  };
+
+  stratify.parentId = function(x) {
+    return arguments.length ? (parentId = required(x), stratify) : parentId;
+  };
+
+  return stratify;
+};
+
+function defaultSeparation$1(a, b) {
+  return a.parent === b.parent ? 1 : 2;
+}
+
+// function radialSeparation(a, b) {
+//   return (a.parent === b.parent ? 1 : 2) / a.depth;
+// }
+
+// This function is used to traverse the left contour of a subtree (or
+// subforest). It returns the successor of v on this contour. This successor is
+// either given by the leftmost child of v or by the thread of v. The function
+// returns null if and only if v is on the highest level of its subtree.
+function nextLeft(v) {
+  var children = v.children;
+  return children ? children[0] : v.t;
+}
+
+// This function works analogously to nextLeft.
+function nextRight(v) {
+  var children = v.children;
+  return children ? children[children.length - 1] : v.t;
+}
+
+// Shifts the current subtree rooted at w+. This is done by increasing
+// prelim(w+) and mod(w+) by shift.
+function moveSubtree(wm, wp, shift) {
+  var change = shift / (wp.i - wm.i);
+  wp.c -= change;
+  wp.s += shift;
+  wm.c += change;
+  wp.z += shift;
+  wp.m += shift;
+}
+
+// All other shifts, applied to the smaller subtrees between w- and w+, are
+// performed by this function. To prepare the shifts, we have to adjust
+// change(w+), shift(w+), and change(w-).
+function executeShifts(v) {
+  var shift = 0,
+      change = 0,
+      children = v.children,
+      i = children.length,
+      w;
+  while (--i >= 0) {
+    w = children[i];
+    w.z += shift;
+    w.m += shift;
+    shift += w.s + (change += w.c);
+  }
+}
+
+// If vi-’s ancestor is a sibling of v, returns vi-’s ancestor. Otherwise,
+// returns the specified (default) ancestor.
+function nextAncestor(vim, v, ancestor) {
+  return vim.a.parent === v.parent ? vim.a : ancestor;
+}
+
+function TreeNode(node, i) {
+  this._ = node;
+  this.parent = null;
+  this.children = null;
+  this.A = null; // default ancestor
+  this.a = this; // ancestor
+  this.z = 0; // prelim
+  this.m = 0; // mod
+  this.c = 0; // change
+  this.s = 0; // shift
+  this.t = null; // thread
+  this.i = i; // number
+}
+
+TreeNode.prototype = Object.create(Node.prototype);
+
+function treeRoot(root) {
+  var tree = new TreeNode(root, 0),
+      node,
+      nodes = [tree],
+      child,
+      children,
+      i,
+      n;
+
+  while (node = nodes.pop()) {
+    if (children = node._.children) {
+      node.children = new Array(n = children.length);
+      for (i = n - 1; i >= 0; --i) {
+        nodes.push(child = node.children[i] = new TreeNode(children[i], i));
+        child.parent = node;
+      }
+    }
+  }
+
+  (tree.parent = new TreeNode(null, 0)).children = [tree];
+  return tree;
+}
+
+// Node-link tree diagram using the Reingold-Tilford "tidy" algorithm
+var tree = function() {
+  var separation = defaultSeparation$1,
+      dx = 1,
+      dy = 1,
+      nodeSize = null;
+
+  function tree(root) {
+    var t = treeRoot(root);
+
+    // Compute the layout using Buchheim et al.’s algorithm.
+    t.eachAfter(firstWalk), t.parent.m = -t.z;
+    t.eachBefore(secondWalk);
+
+    // If a fixed node size is specified, scale x and y.
+    if (nodeSize) root.eachBefore(sizeNode);
+
+    // If a fixed tree size is specified, scale x and y based on the extent.
+    // Compute the left-most, right-most, and depth-most nodes for extents.
+    else {
+      var left = root,
+          right = root,
+          bottom = root;
+      root.eachBefore(function(node) {
+        if (node.x < left.x) left = node;
+        if (node.x > right.x) right = node;
+        if (node.depth > bottom.depth) bottom = node;
+      });
+      var s = left === right ? 1 : separation(left, right) / 2,
+          tx = s - left.x,
+          kx = dx / (right.x + s + tx),
+          ky = dy / (bottom.depth || 1);
+      root.eachBefore(function(node) {
+        node.x = (node.x + tx) * kx;
+        node.y = node.depth * ky;
+      });
+    }
+
+    return root;
+  }
+
+  // Computes a preliminary x-coordinate for v. Before that, FIRST WALK is
+  // applied recursively to the children of v, as well as the function
+  // APPORTION. After spacing out the children by calling EXECUTE SHIFTS, the
+  // node v is placed to the midpoint of its outermost children.
+  function firstWalk(v) {
+    var children = v.children,
+        siblings = v.parent.children,
+        w = v.i ? siblings[v.i - 1] : null;
+    if (children) {
+      executeShifts(v);
+      var midpoint = (children[0].z + children[children.length - 1].z) / 2;
+      if (w) {
+        v.z = w.z + separation(v._, w._);
+        v.m = v.z - midpoint;
+      } else {
+        v.z = midpoint;
+      }
+    } else if (w) {
+      v.z = w.z + separation(v._, w._);
+    }
+    v.parent.A = apportion(v, w, v.parent.A || siblings[0]);
+  }
+
+  // Computes all real x-coordinates by summing up the modifiers recursively.
+  function secondWalk(v) {
+    v._.x = v.z + v.parent.m;
+    v.m += v.parent.m;
+  }
+
+  // The core of the algorithm. Here, a new subtree is combined with the
+  // previous subtrees. Threads are used to traverse the inside and outside
+  // contours of the left and right subtree up to the highest common level. The
+  // vertices used for the traversals are vi+, vi-, vo-, and vo+, where the
+  // superscript o means outside and i means inside, the subscript - means left
+  // subtree and + means right subtree. For summing up the modifiers along the
+  // contour, we use respective variables si+, si-, so-, and so+. Whenever two
+  // nodes of the inside contours conflict, we compute the left one of the
+  // greatest uncommon ancestors using the function ANCESTOR and call MOVE
+  // SUBTREE to shift the subtree and prepare the shifts of smaller subtrees.
+  // Finally, we add a new thread (if necessary).
+  function apportion(v, w, ancestor) {
+    if (w) {
+      var vip = v,
+          vop = v,
+          vim = w,
+          vom = vip.parent.children[0],
+          sip = vip.m,
+          sop = vop.m,
+          sim = vim.m,
+          som = vom.m,
+          shift;
+      while (vim = nextRight(vim), vip = nextLeft(vip), vim && vip) {
+        vom = nextLeft(vom);
+        vop = nextRight(vop);
+        vop.a = v;
+        shift = vim.z + sim - vip.z - sip + separation(vim._, vip._);
+        if (shift > 0) {
+          moveSubtree(nextAncestor(vim, v, ancestor), v, shift);
+          sip += shift;
+          sop += shift;
+        }
+        sim += vim.m;
+        sip += vip.m;
+        som += vom.m;
+        sop += vop.m;
+      }
+      if (vim && !nextRight(vop)) {
+        vop.t = vim;
+        vop.m += sim - sop;
+      }
+      if (vip && !nextLeft(vom)) {
+        vom.t = vip;
+        vom.m += sip - som;
+        ancestor = v;
+      }
+    }
+    return ancestor;
+  }
+
+  function sizeNode(node) {
+    node.x *= dx;
+    node.y = node.depth * dy;
+  }
+
+  tree.separation = function(x) {
+    return arguments.length ? (separation = x, tree) : separation;
+  };
+
+  tree.size = function(x) {
+    return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], tree) : (nodeSize ? null : [dx, dy]);
+  };
+
+  tree.nodeSize = function(x) {
+    return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], tree) : (nodeSize ? [dx, dy] : null);
+  };
+
+  return tree;
+};
+
+var treemapSlice = function(parent, x0, y0, x1, y1) {
+  var nodes = parent.children,
+      node,
+      i = -1,
+      n = nodes.length,
+      k = parent.value && (y1 - y0) / parent.value;
+
+  while (++i < n) {
+    node = nodes[i], node.x0 = x0, node.x1 = x1;
+    node.y0 = y0, node.y1 = y0 += node.value * k;
+  }
+};
+
+var phi = (1 + Math.sqrt(5)) / 2;
+
+function squarifyRatio(ratio, parent, x0, y0, x1, y1) {
+  var rows = [],
+      nodes = parent.children,
+      row,
+      nodeValue,
+      i0 = 0,
+      i1 = 0,
+      n = nodes.length,
+      dx, dy,
+      value = parent.value,
+      sumValue,
+      minValue,
+      maxValue,
+      newRatio,
+      minRatio,
+      alpha,
+      beta;
+
+  while (i0 < n) {
+    dx = x1 - x0, dy = y1 - y0;
+
+    // Find the next non-empty node.
+    do sumValue = nodes[i1++].value; while (!sumValue && i1 < n);
+    minValue = maxValue = sumValue;
+    alpha = Math.max(dy / dx, dx / dy) / (value * ratio);
+    beta = sumValue * sumValue * alpha;
+    minRatio = Math.max(maxValue / beta, beta / minValue);
+
+    // Keep adding nodes while the aspect ratio maintains or improves.
+    for (; i1 < n; ++i1) {
+      sumValue += nodeValue = nodes[i1].value;
+      if (nodeValue < minValue) minValue = nodeValue;
+      if (nodeValue > maxValue) maxValue = nodeValue;
+      beta = sumValue * sumValue * alpha;
+      newRatio = Math.max(maxValue / beta, beta / minValue);
+      if (newRatio > minRatio) { sumValue -= nodeValue; break; }
+      minRatio = newRatio;
+    }
+
+    // Position and record the row orientation.
+    rows.push(row = {value: sumValue, dice: dx < dy, children: nodes.slice(i0, i1)});
+    if (row.dice) treemapDice(row, x0, y0, x1, value ? y0 += dy * sumValue / value : y1);
+    else treemapSlice(row, x0, y0, value ? x0 += dx * sumValue / value : x1, y1);
+    value -= sumValue, i0 = i1;
+  }
+
+  return rows;
+}
+
+var squarify = ((function custom(ratio) {
+
+  function squarify(parent, x0, y0, x1, y1) {
+    squarifyRatio(ratio, parent, x0, y0, x1, y1);
+  }
+
+  squarify.ratio = function(x) {
+    return custom((x = +x) > 1 ? x : 1);
+  };
+
+  return squarify;
+}))(phi);
+
+var index$1 = function() {
+  var tile = squarify,
+      round = false,
+      dx = 1,
+      dy = 1,
+      paddingStack = [0],
+      paddingInner = constantZero,
+      paddingTop = constantZero,
+      paddingRight = constantZero,
+      paddingBottom = constantZero,
+      paddingLeft = constantZero;
+
+  function treemap(root) {
+    root.x0 =
+    root.y0 = 0;
+    root.x1 = dx;
+    root.y1 = dy;
+    root.eachBefore(positionNode);
+    paddingStack = [0];
+    if (round) root.eachBefore(roundNode);
+    return root;
+  }
+
+  function positionNode(node) {
+    var p = paddingStack[node.depth],
+        x0 = node.x0 + p,
+        y0 = node.y0 + p,
+        x1 = node.x1 - p,
+        y1 = node.y1 - p;
+    if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
+    if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
+    node.x0 = x0;
+    node.y0 = y0;
+    node.x1 = x1;
+    node.y1 = y1;
+    if (node.children) {
+      p = paddingStack[node.depth + 1] = paddingInner(node) / 2;
+      x0 += paddingLeft(node) - p;
+      y0 += paddingTop(node) - p;
+      x1 -= paddingRight(node) - p;
+      y1 -= paddingBottom(node) - p;
+      if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
+      if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
+      tile(node, x0, y0, x1, y1);
+    }
+  }
+
+  treemap.round = function(x) {
+    return arguments.length ? (round = !!x, treemap) : round;
+  };
+
+  treemap.size = function(x) {
+    return arguments.length ? (dx = +x[0], dy = +x[1], treemap) : [dx, dy];
+  };
+
+  treemap.tile = function(x) {
+    return arguments.length ? (tile = required(x), treemap) : tile;
+  };
+
+  treemap.padding = function(x) {
+    return arguments.length ? treemap.paddingInner(x).paddingOuter(x) : treemap.paddingInner();
+  };
+
+  treemap.paddingInner = function(x) {
+    return arguments.length ? (paddingInner = typeof x === "function" ? x : constant(+x), treemap) : paddingInner;
+  };
+
+  treemap.paddingOuter = function(x) {
+    return arguments.length ? treemap.paddingTop(x).paddingRight(x).paddingBottom(x).paddingLeft(x) : treemap.paddingTop();
+  };
+
+  treemap.paddingTop = function(x) {
+    return arguments.length ? (paddingTop = typeof x === "function" ? x : constant(+x), treemap) : paddingTop;
+  };
+
+  treemap.paddingRight = function(x) {
+    return arguments.length ? (paddingRight = typeof x === "function" ? x : constant(+x), treemap) : paddingRight;
+  };
+
+  treemap.paddingBottom = function(x) {
+    return arguments.length ? (paddingBottom = typeof x === "function" ? x : constant(+x), treemap) : paddingBottom;
+  };
+
+  treemap.paddingLeft = function(x) {
+    return arguments.length ? (paddingLeft = typeof x === "function" ? x : constant(+x), treemap) : paddingLeft;
+  };
+
+  return treemap;
+};
+
+var binary = function(parent, x0, y0, x1, y1) {
+  var nodes = parent.children,
+      i, n = nodes.length,
+      sum, sums = new Array(n + 1);
+
+  for (sums[0] = sum = i = 0; i < n; ++i) {
+    sums[i + 1] = sum += nodes[i].value;
+  }
+
+  partition(0, n, parent.value, x0, y0, x1, y1);
+
+  function partition(i, j, value, x0, y0, x1, y1) {
+    if (i >= j - 1) {
+      var node = nodes[i];
+      node.x0 = x0, node.y0 = y0;
+      node.x1 = x1, node.y1 = y1;
+      return;
+    }
+
+    var valueOffset = sums[i],
+        valueTarget = (value / 2) + valueOffset,
+        k = i + 1,
+        hi = j - 1;
+
+    while (k < hi) {
+      var mid = k + hi >>> 1;
+      if (sums[mid] < valueTarget) k = mid + 1;
+      else hi = mid;
+    }
+
+    if ((valueTarget - sums[k - 1]) < (sums[k] - valueTarget) && i + 1 < k) --k;
+
+    var valueLeft = sums[k] - valueOffset,
+        valueRight = value - valueLeft;
+
+    if ((x1 - x0) > (y1 - y0)) {
+      var xk = (x0 * valueRight + x1 * valueLeft) / value;
+      partition(i, k, valueLeft, x0, y0, xk, y1);
+      partition(k, j, valueRight, xk, y0, x1, y1);
+    } else {
+      var yk = (y0 * valueRight + y1 * valueLeft) / value;
+      partition(i, k, valueLeft, x0, y0, x1, yk);
+      partition(k, j, valueRight, x0, yk, x1, y1);
+    }
+  }
+};
+
+var sliceDice = function(parent, x0, y0, x1, y1) {
+  (parent.depth & 1 ? treemapSlice : treemapDice)(parent, x0, y0, x1, y1);
+};
+
+var resquarify = ((function custom(ratio) {
+
+  function resquarify(parent, x0, y0, x1, y1) {
+    if ((rows = parent._squarify) && (rows.ratio === ratio)) {
+      var rows,
+          row,
+          nodes,
+          i,
+          j = -1,
+          n,
+          m = rows.length,
+          value = parent.value;
+
+      while (++j < m) {
+        row = rows[j], nodes = row.children;
+        for (i = row.value = 0, n = nodes.length; i < n; ++i) row.value += nodes[i].value;
+        if (row.dice) treemapDice(row, x0, y0, x1, y0 += (y1 - y0) * row.value / value);
+        else treemapSlice(row, x0, y0, x0 += (x1 - x0) * row.value / value, y1);
+        value -= row.value;
+      }
+    } else {
+      parent._squarify = rows = squarifyRatio(ratio, parent, x0, y0, x1, y1);
+      rows.ratio = ratio;
+    }
+  }
+
+  resquarify.ratio = function(x) {
+    return custom((x = +x) > 1 ? x : 1);
+  };
+
+  return resquarify;
+}))(phi);
+
+exports.cluster = cluster;
+exports.hierarchy = hierarchy;
+exports.pack = index;
+exports.packSiblings = siblings;
+exports.packEnclose = enclose;
+exports.partition = partition;
+exports.stratify = stratify;
+exports.tree = tree;
+exports.treemap = index$1;
+exports.treemapBinary = binary;
+exports.treemapDice = treemapDice;
+exports.treemapSlice = treemapSlice;
+exports.treemapSliceDice = sliceDice;
+exports.treemapSquarify = squarify;
+exports.treemapResquarify = resquarify;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+
+},{}],9:[function(require,module,exports){
+// https://d3js.org/d3-interpolate/ Version 1.1.5. Copyright 2017 Mike Bostock.
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-color')) :
+	typeof define === 'function' && define.amd ? define(['exports', 'd3-color'], factory) :
+	(factory((global.d3 = global.d3 || {}),global.d3));
+}(this, (function (exports,d3Color) { 'use strict';
+
+function basis(t1, v0, v1, v2, v3) {
+  var t2 = t1 * t1, t3 = t2 * t1;
+  return ((1 - 3 * t1 + 3 * t2 - t3) * v0
+      + (4 - 6 * t2 + 3 * t3) * v1
+      + (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2
+      + t3 * v3) / 6;
+}
+
+var basis$1 = function(values) {
+  var n = values.length - 1;
+  return function(t) {
+    var i = t <= 0 ? (t = 0) : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n),
+        v1 = values[i],
+        v2 = values[i + 1],
+        v0 = i > 0 ? values[i - 1] : 2 * v1 - v2,
+        v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1;
+    return basis((t - i / n) * n, v0, v1, v2, v3);
+  };
+};
+
+var basisClosed = function(values) {
+  var n = values.length;
+  return function(t) {
+    var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n),
+        v0 = values[(i + n - 1) % n],
+        v1 = values[i % n],
+        v2 = values[(i + 1) % n],
+        v3 = values[(i + 2) % n];
+    return basis((t - i / n) * n, v0, v1, v2, v3);
+  };
+};
+
+var constant = function(x) {
+  return function() {
+    return x;
+  };
+};
+
+function linear(a, d) {
+  return function(t) {
+    return a + t * d;
+  };
+}
+
+function exponential(a, b, y) {
+  return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {
+    return Math.pow(a + t * b, y);
+  };
+}
+
+function hue(a, b) {
+  var d = b - a;
+  return d ? linear(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : constant(isNaN(a) ? b : a);
+}
+
+function gamma(y) {
+  return (y = +y) === 1 ? nogamma : function(a, b) {
+    return b - a ? exponential(a, b, y) : constant(isNaN(a) ? b : a);
+  };
+}
+
+function nogamma(a, b) {
+  var d = b - a;
+  return d ? linear(a, d) : constant(isNaN(a) ? b : a);
+}
+
+var rgb$1 = ((function rgbGamma(y) {
+  var color$$1 = gamma(y);
+
+  function rgb$$1(start, end) {
+    var r = color$$1((start = d3Color.rgb(start)).r, (end = d3Color.rgb(end)).r),
+        g = color$$1(start.g, end.g),
+        b = color$$1(start.b, end.b),
+        opacity = nogamma(start.opacity, end.opacity);
+    return function(t) {
+      start.r = r(t);
+      start.g = g(t);
+      start.b = b(t);
+      start.opacity = opacity(t);
+      return start + "";
+    };
+  }
+
+  rgb$$1.gamma = rgbGamma;
+
+  return rgb$$1;
+}))(1);
+
+function rgbSpline(spline) {
+  return function(colors) {
+    var n = colors.length,
+        r = new Array(n),
+        g = new Array(n),
+        b = new Array(n),
+        i, color$$1;
+    for (i = 0; i < n; ++i) {
+      color$$1 = d3Color.rgb(colors[i]);
+      r[i] = color$$1.r || 0;
+      g[i] = color$$1.g || 0;
+      b[i] = color$$1.b || 0;
+    }
+    r = spline(r);
+    g = spline(g);
+    b = spline(b);
+    color$$1.opacity = 1;
+    return function(t) {
+      color$$1.r = r(t);
+      color$$1.g = g(t);
+      color$$1.b = b(t);
+      return color$$1 + "";
+    };
+  };
+}
+
+var rgbBasis = rgbSpline(basis$1);
+var rgbBasisClosed = rgbSpline(basisClosed);
+
+var array = function(a, b) {
+  var nb = b ? b.length : 0,
+      na = a ? Math.min(nb, a.length) : 0,
+      x = new Array(nb),
+      c = new Array(nb),
+      i;
+
+  for (i = 0; i < na; ++i) x[i] = value(a[i], b[i]);
+  for (; i < nb; ++i) c[i] = b[i];
+
+  return function(t) {
+    for (i = 0; i < na; ++i) c[i] = x[i](t);
+    return c;
+  };
+};
+
+var date = function(a, b) {
+  var d = new Date;
+  return a = +a, b -= a, function(t) {
+    return d.setTime(a + b * t), d;
+  };
+};
+
+var number = function(a, b) {
+  return a = +a, b -= a, function(t) {
+    return a + b * t;
+  };
+};
+
+var object = function(a, b) {
+  var i = {},
+      c = {},
+      k;
+
+  if (a === null || typeof a !== "object") a = {};
+  if (b === null || typeof b !== "object") b = {};
+
+  for (k in b) {
+    if (k in a) {
+      i[k] = value(a[k], b[k]);
+    } else {
+      c[k] = b[k];
+    }
+  }
+
+  return function(t) {
+    for (k in i) c[k] = i[k](t);
+    return c;
+  };
+};
+
+var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g;
+var reB = new RegExp(reA.source, "g");
+
+function zero(b) {
+  return function() {
+    return b;
+  };
+}
+
+function one(b) {
+  return function(t) {
+    return b(t) + "";
+  };
+}
+
+var string = function(a, b) {
+  var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b
+      am, // current match in a
+      bm, // current match in b
+      bs, // string preceding current number in b, if any
+      i = -1, // index in s
+      s = [], // string constants and placeholders
+      q = []; // number interpolators
+
+  // Coerce inputs to strings.
+  a = a + "", b = b + "";
+
+  // Interpolate pairs of numbers in a & b.
+  while ((am = reA.exec(a))
+      && (bm = reB.exec(b))) {
+    if ((bs = bm.index) > bi) { // a string precedes the next number in b
+      bs = b.slice(bi, bs);
+      if (s[i]) s[i] += bs; // coalesce with previous string
+      else s[++i] = bs;
+    }
+    if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match
+      if (s[i]) s[i] += bm; // coalesce with previous string
+      else s[++i] = bm;
+    } else { // interpolate non-matching numbers
+      s[++i] = null;
+      q.push({i: i, x: number(am, bm)});
+    }
+    bi = reB.lastIndex;
+  }
+
+  // Add remains of b.
+  if (bi < b.length) {
+    bs = b.slice(bi);
+    if (s[i]) s[i] += bs; // coalesce with previous string
+    else s[++i] = bs;
+  }
+
+  // Special optimization for only a single match.
+  // Otherwise, interpolate each of the numbers and rejoin the string.
+  return s.length < 2 ? (q[0]
+      ? one(q[0].x)
+      : zero(b))
+      : (b = q.length, function(t) {
+          for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);
+          return s.join("");
+        });
+};
+
+var value = function(a, b) {
+  var t = typeof b, c;
+  return b == null || t === "boolean" ? constant(b)
+      : (t === "number" ? number
+      : t === "string" ? ((c = d3Color.color(b)) ? (b = c, rgb$1) : string)
+      : b instanceof d3Color.color ? rgb$1
+      : b instanceof Date ? date
+      : Array.isArray(b) ? array
+      : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object
+      : number)(a, b);
+};
+
+var round = function(a, b) {
+  return a = +a, b -= a, function(t) {
+    return Math.round(a + b * t);
+  };
+};
+
+var degrees = 180 / Math.PI;
+
+var identity = {
+  translateX: 0,
+  translateY: 0,
+  rotate: 0,
+  skewX: 0,
+  scaleX: 1,
+  scaleY: 1
+};
+
+var decompose = function(a, b, c, d, e, f) {
+  var scaleX, scaleY, skewX;
+  if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
+  if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
+  if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
+  if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
+  return {
+    translateX: e,
+    translateY: f,
+    rotate: Math.atan2(b, a) * degrees,
+    skewX: Math.atan(skewX) * degrees,
+    scaleX: scaleX,
+    scaleY: scaleY
+  };
+};
+
+var cssNode;
+var cssRoot;
+var cssView;
+var svgNode;
+
+function parseCss(value) {
+  if (value === "none") return identity;
+  if (!cssNode) cssNode = document.createElement("DIV"), cssRoot = document.documentElement, cssView = document.defaultView;
+  cssNode.style.transform = value;
+  value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue("transform");
+  cssRoot.removeChild(cssNode);
+  value = value.slice(7, -1).split(",");
+  return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);
+}
+
+function parseSvg(value) {
+  if (value == null) return identity;
+  if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
+  svgNode.setAttribute("transform", value);
+  if (!(value = svgNode.transform.baseVal.consolidate())) return identity;
+  value = value.matrix;
+  return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
+}
+
+function interpolateTransform(parse, pxComma, pxParen, degParen) {
+
+  function pop(s) {
+    return s.length ? s.pop() + " " : "";
+  }
+
+  function translate(xa, ya, xb, yb, s, q) {
+    if (xa !== xb || ya !== yb) {
+      var i = s.push("translate(", null, pxComma, null, pxParen);
+      q.push({i: i - 4, x: number(xa, xb)}, {i: i - 2, x: number(ya, yb)});
+    } else if (xb || yb) {
+      s.push("translate(" + xb + pxComma + yb + pxParen);
+    }
+  }
+
+  function rotate(a, b, s, q) {
+    if (a !== b) {
+      if (a - b > 180) b += 360; else if (b - a > 180) a += 360; // shortest path
+      q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: number(a, b)});
+    } else if (b) {
+      s.push(pop(s) + "rotate(" + b + degParen);
+    }
+  }
+
+  function skewX(a, b, s, q) {
+    if (a !== b) {
+      q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: number(a, b)});
+    } else if (b) {
+      s.push(pop(s) + "skewX(" + b + degParen);
+    }
+  }
+
+  function scale(xa, ya, xb, yb, s, q) {
+    if (xa !== xb || ya !== yb) {
+      var i = s.push(pop(s) + "scale(", null, ",", null, ")");
+      q.push({i: i - 4, x: number(xa, xb)}, {i: i - 2, x: number(ya, yb)});
+    } else if (xb !== 1 || yb !== 1) {
+      s.push(pop(s) + "scale(" + xb + "," + yb + ")");
+    }
+  }
+
+  return function(a, b) {
+    var s = [], // string constants and placeholders
+        q = []; // number interpolators
+    a = parse(a), b = parse(b);
+    translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
+    rotate(a.rotate, b.rotate, s, q);
+    skewX(a.skewX, b.skewX, s, q);
+    scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
+    a = b = null; // gc
+    return function(t) {
+      var i = -1, n = q.length, o;
+      while (++i < n) s[(o = q[i]).i] = o.x(t);
+      return s.join("");
+    };
+  };
+}
+
+var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
+var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
+
+var rho = Math.SQRT2;
+var rho2 = 2;
+var rho4 = 4;
+var epsilon2 = 1e-12;
+
+function cosh(x) {
+  return ((x = Math.exp(x)) + 1 / x) / 2;
+}
+
+function sinh(x) {
+  return ((x = Math.exp(x)) - 1 / x) / 2;
+}
+
+function tanh(x) {
+  return ((x = Math.exp(2 * x)) - 1) / (x + 1);
+}
+
+// p0 = [ux0, uy0, w0]
+// p1 = [ux1, uy1, w1]
+var zoom = function(p0, p1) {
+  var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],
+      ux1 = p1[0], uy1 = p1[1], w1 = p1[2],
+      dx = ux1 - ux0,
+      dy = uy1 - uy0,
+      d2 = dx * dx + dy * dy,
+      i,
+      S;
+
+  // Special case for u0 ≅ u1.
+  if (d2 < epsilon2) {
+    S = Math.log(w1 / w0) / rho;
+    i = function(t) {
+      return [
+        ux0 + t * dx,
+        uy0 + t * dy,
+        w0 * Math.exp(rho * t * S)
+      ];
+    };
+  }
+
+  // General case.
+  else {
+    var d1 = Math.sqrt(d2),
+        b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
+        b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
+        r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
+        r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
+    S = (r1 - r0) / rho;
+    i = function(t) {
+      var s = t * S,
+          coshr0 = cosh(r0),
+          u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
+      return [
+        ux0 + u * dx,
+        uy0 + u * dy,
+        w0 * coshr0 / cosh(rho * s + r0)
+      ];
+    };
+  }
+
+  i.duration = S * 1000;
+
+  return i;
+};
+
+function hsl$1(hue$$1) {
+  return function(start, end) {
+    var h = hue$$1((start = d3Color.hsl(start)).h, (end = d3Color.hsl(end)).h),
+        s = nogamma(start.s, end.s),
+        l = nogamma(start.l, end.l),
+        opacity = nogamma(start.opacity, end.opacity);
+    return function(t) {
+      start.h = h(t);
+      start.s = s(t);
+      start.l = l(t);
+      start.opacity = opacity(t);
+      return start + "";
+    };
+  }
+}
+
+var hsl$2 = hsl$1(hue);
+var hslLong = hsl$1(nogamma);
+
+function lab$1(start, end) {
+  var l = nogamma((start = d3Color.lab(start)).l, (end = d3Color.lab(end)).l),
+      a = nogamma(start.a, end.a),
+      b = nogamma(start.b, end.b),
+      opacity = nogamma(start.opacity, end.opacity);
+  return function(t) {
+    start.l = l(t);
+    start.a = a(t);
+    start.b = b(t);
+    start.opacity = opacity(t);
+    return start + "";
+  };
+}
+
+function hcl$1(hue$$1) {
+  return function(start, end) {
+    var h = hue$$1((start = d3Color.hcl(start)).h, (end = d3Color.hcl(end)).h),
+        c = nogamma(start.c, end.c),
+        l = nogamma(start.l, end.l),
+        opacity = nogamma(start.opacity, end.opacity);
+    return function(t) {
+      start.h = h(t);
+      start.c = c(t);
+      start.l = l(t);
+      start.opacity = opacity(t);
+      return start + "";
+    };
+  }
+}
+
+var hcl$2 = hcl$1(hue);
+var hclLong = hcl$1(nogamma);
+
+function cubehelix$1(hue$$1) {
+  return (function cubehelixGamma(y) {
+    y = +y;
+
+    function cubehelix$$1(start, end) {
+      var h = hue$$1((start = d3Color.cubehelix(start)).h, (end = d3Color.cubehelix(end)).h),
+          s = nogamma(start.s, end.s),
+          l = nogamma(start.l, end.l),
+          opacity = nogamma(start.opacity, end.opacity);
+      return function(t) {
+        start.h = h(t);
+        start.s = s(t);
+        start.l = l(Math.pow(t, y));
+        start.opacity = opacity(t);
+        return start + "";
+      };
+    }
+
+    cubehelix$$1.gamma = cubehelixGamma;
+
+    return cubehelix$$1;
+  })(1);
+}
+
+var cubehelix$2 = cubehelix$1(hue);
+var cubehelixLong = cubehelix$1(nogamma);
+
+var quantize = function(interpolator, n) {
+  var samples = new Array(n);
+  for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1));
+  return samples;
+};
+
+exports.interpolate = value;
+exports.interpolateArray = array;
+exports.interpolateBasis = basis$1;
+exports.interpolateBasisClosed = basisClosed;
+exports.interpolateDate = date;
+exports.interpolateNumber = number;
+exports.interpolateObject = object;
+exports.interpolateRound = round;
+exports.interpolateString = string;
+exports.interpolateTransformCss = interpolateTransformCss;
+exports.interpolateTransformSvg = interpolateTransformSvg;
+exports.interpolateZoom = zoom;
+exports.interpolateRgb = rgb$1;
+exports.interpolateRgbBasis = rgbBasis;
+exports.interpolateRgbBasisClosed = rgbBasisClosed;
+exports.interpolateHsl = hsl$2;
+exports.interpolateHslLong = hslLong;
+exports.interpolateLab = lab$1;
+exports.interpolateHcl = hcl$2;
+exports.interpolateHclLong = hclLong;
+exports.interpolateCubehelix = cubehelix$2;
+exports.interpolateCubehelixLong = cubehelixLong;
+exports.quantize = quantize;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+
+},{"d3-color":4}],10:[function(require,module,exports){
+// https://d3js.org/d3-path/ Version 1.0.5. Copyright 2017 Mike Bostock.
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+	typeof define === 'function' && define.amd ? define(['exports'], factory) :
+	(factory((global.d3 = global.d3 || {})));
+}(this, (function (exports) { 'use strict';
+
+var pi = Math.PI;
+var tau = 2 * pi;
+var epsilon = 1e-6;
+var tauEpsilon = tau - epsilon;
+
+function Path() {
+  this._x0 = this._y0 = // start of current subpath
+  this._x1 = this._y1 = null; // end of current subpath
+  this._ = "";
+}
+
+function path() {
+  return new Path;
+}
+
+Path.prototype = path.prototype = {
+  constructor: Path,
+  moveTo: function(x, y) {
+    this._ += "M" + (this._x0 = this._x1 = +x) + "," + (this._y0 = this._y1 = +y);
+  },
+  closePath: function() {
+    if (this._x1 !== null) {
+      this._x1 = this._x0, this._y1 = this._y0;
+      this._ += "Z";
+    }
+  },
+  lineTo: function(x, y) {
+    this._ += "L" + (this._x1 = +x) + "," + (this._y1 = +y);
+  },
+  quadraticCurveTo: function(x1, y1, x, y) {
+    this._ += "Q" + (+x1) + "," + (+y1) + "," + (this._x1 = +x) + "," + (this._y1 = +y);
+  },
+  bezierCurveTo: function(x1, y1, x2, y2, x, y) {
+    this._ += "C" + (+x1) + "," + (+y1) + "," + (+x2) + "," + (+y2) + "," + (this._x1 = +x) + "," + (this._y1 = +y);
+  },
+  arcTo: function(x1, y1, x2, y2, r) {
+    x1 = +x1, y1 = +y1, x2 = +x2, y2 = +y2, r = +r;
+    var x0 = this._x1,
+        y0 = this._y1,
+        x21 = x2 - x1,
+        y21 = y2 - y1,
+        x01 = x0 - x1,
+        y01 = y0 - y1,
+        l01_2 = x01 * x01 + y01 * y01;
+
+    // Is the radius negative? Error.
+    if (r < 0) throw new Error("negative radius: " + r);
+
+    // Is this path empty? Move to (x1,y1).
+    if (this._x1 === null) {
+      this._ += "M" + (this._x1 = x1) + "," + (this._y1 = y1);
+    }
+
+    // Or, is (x1,y1) coincident with (x0,y0)? Do nothing.
+    else if (!(l01_2 > epsilon)) {}
+
+    // Or, are (x0,y0), (x1,y1) and (x2,y2) collinear?
+    // Equivalently, is (x1,y1) coincident with (x2,y2)?
+    // Or, is the radius zero? Line to (x1,y1).
+    else if (!(Math.abs(y01 * x21 - y21 * x01) > epsilon) || !r) {
+      this._ += "L" + (this._x1 = x1) + "," + (this._y1 = y1);
+    }
+
+    // Otherwise, draw an arc!
+    else {
+      var x20 = x2 - x0,
+          y20 = y2 - y0,
+          l21_2 = x21 * x21 + y21 * y21,
+          l20_2 = x20 * x20 + y20 * y20,
+          l21 = Math.sqrt(l21_2),
+          l01 = Math.sqrt(l01_2),
+          l = r * Math.tan((pi - Math.acos((l21_2 + l01_2 - l20_2) / (2 * l21 * l01))) / 2),
+          t01 = l / l01,
+          t21 = l / l21;
+
+      // If the start tangent is not coincident with (x0,y0), line to.
+      if (Math.abs(t01 - 1) > epsilon) {
+        this._ += "L" + (x1 + t01 * x01) + "," + (y1 + t01 * y01);
+      }
+
+      this._ += "A" + r + "," + r + ",0,0," + (+(y01 * x20 > x01 * y20)) + "," + (this._x1 = x1 + t21 * x21) + "," + (this._y1 = y1 + t21 * y21);
+    }
+  },
+  arc: function(x, y, r, a0, a1, ccw) {
+    x = +x, y = +y, r = +r;
+    var dx = r * Math.cos(a0),
+        dy = r * Math.sin(a0),
+        x0 = x + dx,
+        y0 = y + dy,
+        cw = 1 ^ ccw,
+        da = ccw ? a0 - a1 : a1 - a0;
+
+    // Is the radius negative? Error.
+    if (r < 0) throw new Error("negative radius: " + r);
+
+    // Is this path empty? Move to (x0,y0).
+    if (this._x1 === null) {
+      this._ += "M" + x0 + "," + y0;
+    }
+
+    // Or, is (x0,y0) not coincident with the previous point? Line to (x0,y0).
+    else if (Math.abs(this._x1 - x0) > epsilon || Math.abs(this._y1 - y0) > epsilon) {
+      this._ += "L" + x0 + "," + y0;
+    }
+
+    // Is this arc empty? We’re done.
+    if (!r) return;
+
+    // Does the angle go the wrong way? Flip the direction.
+    if (da < 0) da = da % tau + tau;
+
+    // Is this a complete circle? Draw two arcs to complete the circle.
+    if (da > tauEpsilon) {
+      this._ += "A" + r + "," + r + ",0,1," + cw + "," + (x - dx) + "," + (y - dy) + "A" + r + "," + r + ",0,1," + cw + "," + (this._x1 = x0) + "," + (this._y1 = y0);
+    }
+
+    // Is this arc non-empty? Draw an arc!
+    else if (da > epsilon) {
+      this._ += "A" + r + "," + r + ",0," + (+(da >= pi)) + "," + cw + "," + (this._x1 = x + r * Math.cos(a1)) + "," + (this._y1 = y + r * Math.sin(a1));
+    }
+  },
+  rect: function(x, y, w, h) {
+    this._ += "M" + (this._x0 = this._x1 = +x) + "," + (this._y0 = this._y1 = +y) + "h" + (+w) + "v" + (+h) + "h" + (-w) + "Z";
+  },
+  toString: function() {
+    return this._;
+  }
+};
+
+exports.path = path;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+
+},{}],11:[function(require,module,exports){
+// https://d3js.org/d3-scale/ Version 1.0.6. Copyright 2017 Mike Bostock.
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-array'), require('d3-collection'), require('d3-interpolate'), require('d3-format'), require('d3-time'), require('d3-time-format'), require('d3-color')) :
+	typeof define === 'function' && define.amd ? define(['exports', 'd3-array', 'd3-collection', 'd3-interpolate', 'd3-format', 'd3-time', 'd3-time-format', 'd3-color'], factory) :
+	(factory((global.d3 = global.d3 || {}),global.d3,global.d3,global.d3,global.d3,global.d3,global.d3,global.d3));
+}(this, (function (exports,d3Array,d3Collection,d3Interpolate,d3Format,d3Time,d3TimeFormat,d3Color) { 'use strict';
+
+var array = Array.prototype;
+
+var map$1 = array.map;
+var slice = array.slice;
+
+var implicit = {name: "implicit"};
+
+function ordinal(range$$1) {
+  var index = d3Collection.map(),
+      domain = [],
+      unknown = implicit;
+
+  range$$1 = range$$1 == null ? [] : slice.call(range$$1);
+
+  function scale(d) {
+    var key = d + "", i = index.get(key);
+    if (!i) {
+      if (unknown !== implicit) return unknown;
+      index.set(key, i = domain.push(d));
+    }
+    return range$$1[(i - 1) % range$$1.length];
+  }
+
+  scale.domain = function(_) {
+    if (!arguments.length) return domain.slice();
+    domain = [], index = d3Collection.map();
+    var i = -1, n = _.length, d, key;
+    while (++i < n) if (!index.has(key = (d = _[i]) + "")) index.set(key, domain.push(d));
+    return scale;
+  };
+
+  scale.range = function(_) {
+    return arguments.length ? (range$$1 = slice.call(_), scale) : range$$1.slice();
+  };
+
+  scale.unknown = function(_) {
+    return arguments.length ? (unknown = _, scale) : unknown;
+  };
+
+  scale.copy = function() {
+    return ordinal()
+        .domain(domain)
+        .range(range$$1)
+        .unknown(unknown);
+  };
+
+  return scale;
+}
+
+function band() {
+  var scale = ordinal().unknown(undefined),
+      domain = scale.domain,
+      ordinalRange = scale.range,
+      range$$1 = [0, 1],
+      step,
+      bandwidth,
+      round = false,
+      paddingInner = 0,
+      paddingOuter = 0,
+      align = 0.5;
+
+  delete scale.unknown;
+
+  function rescale() {
+    var n = domain().length,
+        reverse = range$$1[1] < range$$1[0],
+        start = range$$1[reverse - 0],
+        stop = range$$1[1 - reverse];
+    step = (stop - start) / Math.max(1, n - paddingInner + paddingOuter * 2);
+    if (round) step = Math.floor(step);
+    start += (stop - start - step * (n - paddingInner)) * align;
+    bandwidth = step * (1 - paddingInner);
+    if (round) start = Math.round(start), bandwidth = Math.round(bandwidth);
+    var values = d3Array.range(n).map(function(i) { return start + step * i; });
+    return ordinalRange(reverse ? values.reverse() : values);
+  }
+
+  scale.domain = function(_) {
+    return arguments.length ? (domain(_), rescale()) : domain();
+  };
+
+  scale.range = function(_) {
+    return arguments.length ? (range$$1 = [+_[0], +_[1]], rescale()) : range$$1.slice();
+  };
+
+  scale.rangeRound = function(_) {
+    return range$$1 = [+_[0], +_[1]], round = true, rescale();
+  };
+
+  scale.bandwidth = function() {
+    return bandwidth;
+  };
+
+  scale.step = function() {
+    return step;
+  };
+
+  scale.round = function(_) {
+    return arguments.length ? (round = !!_, rescale()) : round;
+  };
+
+  scale.padding = function(_) {
+    return arguments.length ? (paddingInner = paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingInner;
+  };
+
+  scale.paddingInner = function(_) {
+    return arguments.length ? (paddingInner = Math.max(0, Math.min(1, _)), rescale()) : paddingInner;
+  };
+
+  scale.paddingOuter = function(_) {
+    return arguments.length ? (paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingOuter;
+  };
+
+  scale.align = function(_) {
+    return arguments.length ? (align = Math.max(0, Math.min(1, _)), rescale()) : align;
+  };
+
+  scale.copy = function() {
+    return band()
+        .domain(domain())
+        .range(range$$1)
+        .round(round)
+        .paddingInner(paddingInner)
+        .paddingOuter(paddingOuter)
+        .align(align);
+  };
+
+  return rescale();
+}
+
+function pointish(scale) {
+  var copy = scale.copy;
+
+  scale.padding = scale.paddingOuter;
+  delete scale.paddingInner;
+  delete scale.paddingOuter;
+
+  scale.copy = function() {
+    return pointish(copy());
+  };
+
+  return scale;
+}
+
+function point() {
+  return pointish(band().paddingInner(1));
+}
+
+var constant = function(x) {
+  return function() {
+    return x;
+  };
+};
+
+var number = function(x) {
+  return +x;
+};
+
+var unit = [0, 1];
+
+function deinterpolateLinear(a, b) {
+  return (b -= (a = +a))
+      ? function(x) { return (x - a) / b; }
+      : constant(b);
+}
+
+function deinterpolateClamp(deinterpolate) {
+  return function(a, b) {
+    var d = deinterpolate(a = +a, b = +b);
+    return function(x) { return x <= a ? 0 : x >= b ? 1 : d(x); };
+  };
+}
+
+function reinterpolateClamp(reinterpolate) {
+  return function(a, b) {
+    var r = reinterpolate(a = +a, b = +b);
+    return function(t) { return t <= 0 ? a : t >= 1 ? b : r(t); };
+  };
+}
+
+function bimap(domain, range$$1, deinterpolate, reinterpolate) {
+  var d0 = domain[0], d1 = domain[1], r0 = range$$1[0], r1 = range$$1[1];
+  if (d1 < d0) d0 = deinterpolate(d1, d0), r0 = reinterpolate(r1, r0);
+  else d0 = deinterpolate(d0, d1), r0 = reinterpolate(r0, r1);
+  return function(x) { return r0(d0(x)); };
+}
+
+function polymap(domain, range$$1, deinterpolate, reinterpolate) {
+  var j = Math.min(domain.length, range$$1.length) - 1,
+      d = new Array(j),
+      r = new Array(j),
+      i = -1;
+
+  // Reverse descending domains.
+  if (domain[j] < domain[0]) {
+    domain = domain.slice().reverse();
+    range$$1 = range$$1.slice().reverse();
+  }
+
+  while (++i < j) {
+    d[i] = deinterpolate(domain[i], domain[i + 1]);
+    r[i] = reinterpolate(range$$1[i], range$$1[i + 1]);
+  }
+
+  return function(x) {
+    var i = d3Array.bisect(domain, x, 1, j) - 1;
+    return r[i](d[i](x));
+  };
+}
+
+function copy(source, target) {
+  return target
+      .domain(source.domain())
+      .range(source.range())
+      .interpolate(source.interpolate())
+      .clamp(source.clamp());
+}
+
+// deinterpolate(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
+// reinterpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding domain value x in [a,b].
+function continuous(deinterpolate, reinterpolate) {
+  var domain = unit,
+      range$$1 = unit,
+      interpolate$$1 = d3Interpolate.interpolate,
+      clamp = false,
+      piecewise,
+      output,
+      input;
+
+  function rescale() {
+    piecewise = Math.min(domain.length, range$$1.length) > 2 ? polymap : bimap;
+    output = input = null;
+    return scale;
+  }
+
+  function scale(x) {
+    return (output || (output = piecewise(domain, range$$1, clamp ? deinterpolateClamp(deinterpolate) : deinterpolate, interpolate$$1)))(+x);
+  }
+
+  scale.invert = function(y) {
+    return (input || (input = piecewise(range$$1, domain, deinterpolateLinear, clamp ? reinterpolateClamp(reinterpolate) : reinterpolate)))(+y);
+  };
+
+  scale.domain = function(_) {
+    return arguments.length ? (domain = map$1.call(_, number), rescale()) : domain.slice();
+  };
+
+  scale.range = function(_) {
+    return arguments.length ? (range$$1 = slice.call(_), rescale()) : range$$1.slice();
+  };
+
+  scale.rangeRound = function(_) {
+    return range$$1 = slice.call(_), interpolate$$1 = d3Interpolate.interpolateRound, rescale();
+  };
+
+  scale.clamp = function(_) {
+    return arguments.length ? (clamp = !!_, rescale()) : clamp;
+  };
+
+  scale.interpolate = function(_) {
+    return arguments.length ? (interpolate$$1 = _, rescale()) : interpolate$$1;
+  };
+
+  return rescale();
+}
+
+var tickFormat = function(domain, count, specifier) {
+  var start = domain[0],
+      stop = domain[domain.length - 1],
+      step = d3Array.tickStep(start, stop, count == null ? 10 : count),
+      precision;
+  specifier = d3Format.formatSpecifier(specifier == null ? ",f" : specifier);
+  switch (specifier.type) {
+    case "s": {
+      var value = Math.max(Math.abs(start), Math.abs(stop));
+      if (specifier.precision == null && !isNaN(precision = d3Format.precisionPrefix(step, value))) specifier.precision = precision;
+      return d3Format.formatPrefix(specifier, value);
+    }
+    case "":
+    case "e":
+    case "g":
+    case "p":
+    case "r": {
+      if (specifier.precision == null && !isNaN(precision = d3Format.precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e");
+      break;
+    }
+    case "f":
+    case "%": {
+      if (specifier.precision == null && !isNaN(precision = d3Format.precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
+      break;
+    }
+  }
+  return d3Format.format(specifier);
+};
+
+function linearish(scale) {
+  var domain = scale.domain;
+
+  scale.ticks = function(count) {
+    var d = domain();
+    return d3Array.ticks(d[0], d[d.length - 1], count == null ? 10 : count);
+  };
+
+  scale.tickFormat = function(count, specifier) {
+    return tickFormat(domain(), count, specifier);
+  };
+
+  scale.nice = function(count) {
+    if (count == null) count = 10;
+
+    var d = domain(),
+        i0 = 0,
+        i1 = d.length - 1,
+        start = d[i0],
+        stop = d[i1],
+        step;
+
+    if (stop < start) {
+      step = start, start = stop, stop = step;
+      step = i0, i0 = i1, i1 = step;
+    }
+
+    step = d3Array.tickIncrement(start, stop, count);
+
+    if (step > 0) {
+      start = Math.floor(start / step) * step;
+      stop = Math.ceil(stop / step) * step;
+      step = d3Array.tickIncrement(start, stop, count);
+    } else if (step < 0) {
+      start = Math.ceil(start * step) / step;
+      stop = Math.floor(stop * step) / step;
+      step = d3Array.tickIncrement(start, stop, count);
+    }
+
+    if (step > 0) {
+      d[i0] = Math.floor(start / step) * step;
+      d[i1] = Math.ceil(stop / step) * step;
+      domain(d);
+    } else if (step < 0) {
+      d[i0] = Math.ceil(start * step) / step;
+      d[i1] = Math.floor(stop * step) / step;
+      domain(d);
+    }
+
+    return scale;
+  };
+
+  return scale;
+}
+
+function linear() {
+  var scale = continuous(deinterpolateLinear, d3Interpolate.interpolateNumber);
+
+  scale.copy = function() {
+    return copy(scale, linear());
+  };
+
+  return linearish(scale);
+}
+
+function identity() {
+  var domain = [0, 1];
+
+  function scale(x) {
+    return +x;
+  }
+
+  scale.invert = scale;
+
+  scale.domain = scale.range = function(_) {
+    return arguments.length ? (domain = map$1.call(_, number), scale) : domain.slice();
+  };
+
+  scale.copy = function() {
+    return identity().domain(domain);
+  };
+
+  return linearish(scale);
+}
+
+var nice = function(domain, interval) {
+  domain = domain.slice();
+
+  var i0 = 0,
+      i1 = domain.length - 1,
+      x0 = domain[i0],
+      x1 = domain[i1],
+      t;
+
+  if (x1 < x0) {
+    t = i0, i0 = i1, i1 = t;
+    t = x0, x0 = x1, x1 = t;
+  }
+
+  domain[i0] = interval.floor(x0);
+  domain[i1] = interval.ceil(x1);
+  return domain;
+};
+
+function deinterpolate(a, b) {
+  return (b = Math.log(b / a))
+      ? function(x) { return Math.log(x / a) / b; }
+      : constant(b);
+}
+
+function reinterpolate(a, b) {
+  return a < 0
+      ? function(t) { return -Math.pow(-b, t) * Math.pow(-a, 1 - t); }
+      : function(t) { return Math.pow(b, t) * Math.pow(a, 1 - t); };
+}
+
+function pow10(x) {
+  return isFinite(x) ? +("1e" + x) : x < 0 ? 0 : x;
+}
+
+function powp(base) {
+  return base === 10 ? pow10
+      : base === Math.E ? Math.exp
+      : function(x) { return Math.pow(base, x); };
+}
+
+function logp(base) {
+  return base === Math.E ? Math.log
+      : base === 10 && Math.log10
+      || base === 2 && Math.log2
+      || (base = Math.log(base), function(x) { return Math.log(x) / base; });
+}
+
+function reflect(f) {
+  return function(x) {
+    return -f(-x);
+  };
+}
+
+function log() {
+  var scale = continuous(deinterpolate, reinterpolate).domain([1, 10]),
+      domain = scale.domain,
+      base = 10,
+      logs = logp(10),
+      pows = powp(10);
+
+  function rescale() {
+    logs = logp(base), pows = powp(base);
+    if (domain()[0] < 0) logs = reflect(logs), pows = reflect(pows);
+    return scale;
+  }
+
+  scale.base = function(_) {
+    return arguments.length ? (base = +_, rescale()) : base;
+  };
+
+  scale.domain = function(_) {
+    return arguments.length ? (domain(_), rescale()) : domain();
+  };
+
+  scale.ticks = function(count) {
+    var d = domain(),
+        u = d[0],
+        v = d[d.length - 1],
+        r;
+
+    if (r = v < u) i = u, u = v, v = i;
+
+    var i = logs(u),
+        j = logs(v),
+        p,
+        k,
+        t,
+        n = count == null ? 10 : +count,
+        z = [];
+
+    if (!(base % 1) && j - i < n) {
+      i = Math.round(i) - 1, j = Math.round(j) + 1;
+      if (u > 0) for (; i < j; ++i) {
+        for (k = 1, p = pows(i); k < base; ++k) {
+          t = p * k;
+          if (t < u) continue;
+          if (t > v) break;
+          z.push(t);
+        }
+      } else for (; i < j; ++i) {
+        for (k = base - 1, p = pows(i); k >= 1; --k) {
+          t = p * k;
+          if (t < u) continue;
+          if (t > v) break;
+          z.push(t);
+        }
+      }
+    } else {
+      z = d3Array.ticks(i, j, Math.min(j - i, n)).map(pows);
+    }
+
+    return r ? z.reverse() : z;
+  };
+
+  scale.tickFormat = function(count, specifier) {
+    if (specifier == null) specifier = base === 10 ? ".0e" : ",";
+    if (typeof specifier !== "function") specifier = d3Format.format(specifier);
+    if (count === Infinity) return specifier;
+    if (count == null) count = 10;
+    var k = Math.max(1, base * count / scale.ticks().length); // TODO fast estimate?
+    return function(d) {
+      var i = d / pows(Math.round(logs(d)));
+      if (i * base < base - 0.5) i *= base;
+      return i <= k ? specifier(d) : "";
+    };
+  };
+
+  scale.nice = function() {
+    return domain(nice(domain(), {
+      floor: function(x) { return pows(Math.floor(logs(x))); },
+      ceil: function(x) { return pows(Math.ceil(logs(x))); }
+    }));
+  };
+
+  scale.copy = function() {
+    return copy(scale, log().base(base));
+  };
+
+  return scale;
+}
+
+function raise(x, exponent) {
+  return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);
+}
+
+function pow() {
+  var exponent = 1,
+      scale = continuous(deinterpolate, reinterpolate),
+      domain = scale.domain;
+
+  function deinterpolate(a, b) {
+    return (b = raise(b, exponent) - (a = raise(a, exponent)))
+        ? function(x) { return (raise(x, exponent) - a) / b; }
+        : constant(b);
+  }
+
+  function reinterpolate(a, b) {
+    b = raise(b, exponent) - (a = raise(a, exponent));
+    return function(t) { return raise(a + b * t, 1 / exponent); };
+  }
+
+  scale.exponent = function(_) {
+    return arguments.length ? (exponent = +_, domain(domain())) : exponent;
+  };
+
+  scale.copy = function() {
+    return copy(scale, pow().exponent(exponent));
+  };
+
+  return linearish(scale);
+}
+
+function sqrt() {
+  return pow().exponent(0.5);
+}
+
+function quantile$1() {
+  var domain = [],
+      range$$1 = [],
+      thresholds = [];
+
+  function rescale() {
+    var i = 0, n = Math.max(1, range$$1.length);
+    thresholds = new Array(n - 1);
+    while (++i < n) thresholds[i - 1] = d3Array.quantile(domain, i / n);
+    return scale;
+  }
+
+  function scale(x) {
+    if (!isNaN(x = +x)) return range$$1[d3Array.bisect(thresholds, x)];
+  }
+
+  scale.invertExtent = function(y) {
+    var i = range$$1.indexOf(y);
+    return i < 0 ? [NaN, NaN] : [
+      i > 0 ? thresholds[i - 1] : domain[0],
+      i < thresholds.length ? thresholds[i] : domain[domain.length - 1]
+    ];
+  };
+
+  scale.domain = function(_) {
+    if (!arguments.length) return domain.slice();
+    domain = [];
+    for (var i = 0, n = _.length, d; i < n; ++i) if (d = _[i], d != null && !isNaN(d = +d)) domain.push(d);
+    domain.sort(d3Array.ascending);
+    return rescale();
+  };
+
+  scale.range = function(_) {
+    return arguments.length ? (range$$1 = slice.call(_), rescale()) : range$$1.slice();
+  };
+
+  scale.quantiles = function() {
+    return thresholds.slice();
+  };
+
+  scale.copy = function() {
+    return quantile$1()
+        .domain(domain)
+        .range(range$$1);
+  };
+
+  return scale;
+}
+
+function quantize() {
+  var x0 = 0,
+      x1 = 1,
+      n = 1,
+      domain = [0.5],
+      range$$1 = [0, 1];
+
+  function scale(x) {
+    if (x <= x) return range$$1[d3Array.bisect(domain, x, 0, n)];
+  }
+
+  function rescale() {
+    var i = -1;
+    domain = new Array(n);
+    while (++i < n) domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
+    return scale;
+  }
+
+  scale.domain = function(_) {
+    return arguments.length ? (x0 = +_[0], x1 = +_[1], rescale()) : [x0, x1];
+  };
+
+  scale.range = function(_) {
+    return arguments.length ? (n = (range$$1 = slice.call(_)).length - 1, rescale()) : range$$1.slice();
+  };
+
+  scale.invertExtent = function(y) {
+    var i = range$$1.indexOf(y);
+    return i < 0 ? [NaN, NaN]
+        : i < 1 ? [x0, domain[0]]
+        : i >= n ? [domain[n - 1], x1]
+        : [domain[i - 1], domain[i]];
+  };
+
+  scale.copy = function() {
+    return quantize()
+        .domain([x0, x1])
+        .range(range$$1);
+  };
+
+  return linearish(scale);
+}
+
+function threshold() {
+  var domain = [0.5],
+      range$$1 = [0, 1],
+      n = 1;
+
+  function scale(x) {
+    if (x <= x) return range$$1[d3Array.bisect(domain, x, 0, n)];
+  }
+
+  scale.domain = function(_) {
+    return arguments.length ? (domain = slice.call(_), n = Math.min(domain.length, range$$1.length - 1), scale) : domain.slice();
+  };
+
+  scale.range = function(_) {
+    return arguments.length ? (range$$1 = slice.call(_), n = Math.min(domain.length, range$$1.length - 1), scale) : range$$1.slice();
+  };
+
+  scale.invertExtent = function(y) {
+    var i = range$$1.indexOf(y);
+    return [domain[i - 1], domain[i]];
+  };
+
+  scale.copy = function() {
+    return threshold()
+        .domain(domain)
+        .range(range$$1);
+  };
+
+  return scale;
+}
+
+var durationSecond = 1000;
+var durationMinute = durationSecond * 60;
+var durationHour = durationMinute * 60;
+var durationDay = durationHour * 24;
+var durationWeek = durationDay * 7;
+var durationMonth = durationDay * 30;
+var durationYear = durationDay * 365;
+
+function date(t) {
+  return new Date(t);
+}
+
+function number$1(t) {
+  return t instanceof Date ? +t : +new Date(+t);
+}
+
+function calendar(year, month, week, day, hour, minute, second, millisecond, format$$1) {
+  var scale = continuous(deinterpolateLinear, d3Interpolate.interpolateNumber),
+      invert = scale.invert,
+      domain = scale.domain;
+
+  var formatMillisecond = format$$1(".%L"),
+      formatSecond = format$$1(":%S"),
+      formatMinute = format$$1("%I:%M"),
+      formatHour = format$$1("%I %p"),
+      formatDay = format$$1("%a %d"),
+      formatWeek = format$$1("%b %d"),
+      formatMonth = format$$1("%B"),
+      formatYear = format$$1("%Y");
+
+  var tickIntervals = [
+    [second,  1,      durationSecond],
+    [second,  5,  5 * durationSecond],
+    [second, 15, 15 * durationSecond],
+    [second, 30, 30 * durationSecond],
+    [minute,  1,      durationMinute],
+    [minute,  5,  5 * durationMinute],
+    [minute, 15, 15 * durationMinute],
+    [minute, 30, 30 * durationMinute],
+    [  hour,  1,      durationHour  ],
+    [  hour,  3,  3 * durationHour  ],
+    [  hour,  6,  6 * durationHour  ],
+    [  hour, 12, 12 * durationHour  ],
+    [   day,  1,      durationDay   ],
+    [   day,  2,  2 * durationDay   ],
+    [  week,  1,      durationWeek  ],
+    [ month,  1,      durationMonth ],
+    [ month,  3,  3 * durationMonth ],
+    [  year,  1,      durationYear  ]
+  ];
+
+  function tickFormat(date) {
+    return (second(date) < date ? formatMillisecond
+        : minute(date) < date ? formatSecond
+        : hour(date) < date ? formatMinute
+        : day(date) < date ? formatHour
+        : month(date) < date ? (week(date) < date ? formatDay : formatWeek)
+        : year(date) < date ? formatMonth
+        : formatYear)(date);
+  }
+
+  function tickInterval(interval, start, stop, step) {
+    if (interval == null) interval = 10;
+
+    // If a desired tick count is specified, pick a reasonable tick interval
+    // based on the extent of the domain and a rough estimate of tick size.
+    // Otherwise, assume interval is already a time interval and use it.
+    if (typeof interval === "number") {
+      var target = Math.abs(stop - start) / interval,
+          i = d3Array.bisector(function(i) { return i[2]; }).right(tickIntervals, target);
+      if (i === tickIntervals.length) {
+        step = d3Array.tickStep(start / durationYear, stop / durationYear, interval);
+        interval = year;
+      } else if (i) {
+        i = tickIntervals[target / tickIntervals[i - 1][2] < tickIntervals[i][2] / target ? i - 1 : i];
+        step = i[1];
+        interval = i[0];
+      } else {
+        step = d3Array.tickStep(start, stop, interval);
+        interval = millisecond;
+      }
+    }
+
+    return step == null ? interval : interval.every(step);
+  }
+
+  scale.invert = function(y) {
+    return new Date(invert(y));
+  };
+
+  scale.domain = function(_) {
+    return arguments.length ? domain(map$1.call(_, number$1)) : domain().map(date);
+  };
+
+  scale.ticks = function(interval, step) {
+    var d = domain(),
+        t0 = d[0],
+        t1 = d[d.length - 1],
+        r = t1 < t0,
+        t;
+    if (r) t = t0, t0 = t1, t1 = t;
+    t = tickInterval(interval, t0, t1, step);
+    t = t ? t.range(t0, t1 + 1) : []; // inclusive stop
+    return r ? t.reverse() : t;
+  };
+
+  scale.tickFormat = function(count, specifier) {
+    return specifier == null ? tickFormat : format$$1(specifier);
+  };
+
+  scale.nice = function(interval, step) {
+    var d = domain();
+    return (interval = tickInterval(interval, d[0], d[d.length - 1], step))
+        ? domain(nice(d, interval))
+        : scale;
+  };
+
+  scale.copy = function() {
+    return copy(scale, calendar(year, month, week, day, hour, minute, second, millisecond, format$$1));
+  };
+
+  return scale;
+}
+
+var time = function() {
+  return calendar(d3Time.timeYear, d3Time.timeMonth, d3Time.timeWeek, d3Time.timeDay, d3Time.timeHour, d3Time.timeMinute, d3Time.timeSecond, d3Time.timeMillisecond, d3TimeFormat.timeFormat).domain([new Date(2000, 0, 1), new Date(2000, 0, 2)]);
+};
+
+var utcTime = function() {
+  return calendar(d3Time.utcYear, d3Time.utcMonth, d3Time.utcWeek, d3Time.utcDay, d3Time.utcHour, d3Time.utcMinute, d3Time.utcSecond, d3Time.utcMillisecond, d3TimeFormat.utcFormat).domain([Date.UTC(2000, 0, 1), Date.UTC(2000, 0, 2)]);
+};
+
+var colors = function(s) {
+  return s.match(/.{6}/g).map(function(x) {
+    return "#" + x;
+  });
+};
+
+var category10 = colors("1f77b4ff7f0e2ca02cd627289467bd8c564be377c27f7f7fbcbd2217becf");
+
+var category20b = colors("393b795254a36b6ecf9c9ede6379398ca252b5cf6bcedb9c8c6d31bd9e39e7ba52e7cb94843c39ad494ad6616be7969c7b4173a55194ce6dbdde9ed6");
+
+var category20c = colors("3182bd6baed69ecae1c6dbefe6550dfd8d3cfdae6bfdd0a231a35474c476a1d99bc7e9c0756bb19e9ac8bcbddcdadaeb636363969696bdbdbdd9d9d9");
+
+var category20 = colors("1f77b4aec7e8ff7f0effbb782ca02c98df8ad62728ff98969467bdc5b0d58c564bc49c94e377c2f7b6d27f7f7fc7c7c7bcbd22dbdb8d17becf9edae5");
+
+var cubehelix$1 = d3Interpolate.interpolateCubehelixLong(d3Color.cubehelix(300, 0.5, 0.0), d3Color.cubehelix(-240, 0.5, 1.0));
+
+var warm = d3Interpolate.interpolateCubehelixLong(d3Color.cubehelix(-100, 0.75, 0.35), d3Color.cubehelix(80, 1.50, 0.8));
+
+var cool = d3Interpolate.interpolateCubehelixLong(d3Color.cubehelix(260, 0.75, 0.35), d3Color.cubehelix(80, 1.50, 0.8));
+
+var rainbow = d3Color.cubehelix();
+
+var rainbow$1 = function(t) {
+  if (t < 0 || t > 1) t -= Math.floor(t);
+  var ts = Math.abs(t - 0.5);
+  rainbow.h = 360 * t - 100;
+  rainbow.s = 1.5 - 1.5 * ts;
+  rainbow.l = 0.8 - 0.9 * ts;
+  return rainbow + "";
+};
+
+function ramp(range$$1) {
+  var n = range$$1.length;
+  return function(t) {
+    return range$$1[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];
+  };
+}
+
+var viridis = ramp(colors("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"));
+
+var magma = ramp(colors("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"));
+
+var inferno = ramp(colors("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"));
+
+var plasma = ramp(colors("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"));
+
+function sequential(interpolator) {
+  var x0 = 0,
+      x1 = 1,
+      clamp = false;
+
+  function scale(x) {
+    var t = (x - x0) / (x1 - x0);
+    return interpolator(clamp ? Math.max(0, Math.min(1, t)) : t);
+  }
+
+  scale.domain = function(_) {
+    return arguments.length ? (x0 = +_[0], x1 = +_[1], scale) : [x0, x1];
+  };
+
+  scale.clamp = function(_) {
+    return arguments.length ? (clamp = !!_, scale) : clamp;
+  };
+
+  scale.interpolator = function(_) {
+    return arguments.length ? (interpolator = _, scale) : interpolator;
+  };
+
+  scale.copy = function() {
+    return sequential(interpolator).domain([x0, x1]).clamp(clamp);
+  };
+
+  return linearish(scale);
+}
+
+exports.scaleBand = band;
+exports.scalePoint = point;
+exports.scaleIdentity = identity;
+exports.scaleLinear = linear;
+exports.scaleLog = log;
+exports.scaleOrdinal = ordinal;
+exports.scaleImplicit = implicit;
+exports.scalePow = pow;
+exports.scaleSqrt = sqrt;
+exports.scaleQuantile = quantile$1;
+exports.scaleQuantize = quantize;
+exports.scaleThreshold = threshold;
+exports.scaleTime = time;
+exports.scaleUtc = utcTime;
+exports.schemeCategory10 = category10;
+exports.schemeCategory20b = category20b;
+exports.schemeCategory20c = category20c;
+exports.schemeCategory20 = category20;
+exports.interpolateCubehelixDefault = cubehelix$1;
+exports.interpolateRainbow = rainbow$1;
+exports.interpolateWarm = warm;
+exports.interpolateCool = cool;
+exports.interpolateViridis = viridis;
+exports.interpolateMagma = magma;
+exports.interpolateInferno = inferno;
+exports.interpolatePlasma = plasma;
+exports.scaleSequential = sequential;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+
+},{"d3-array":2,"d3-collection":3,"d3-color":4,"d3-format":7,"d3-interpolate":9,"d3-time":15,"d3-time-format":14}],12:[function(require,module,exports){
+// https://d3js.org/d3-selection/ Version 1.1.0. Copyright 2017 Mike Bostock.
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+	typeof define === 'function' && define.amd ? define(['exports'], factory) :
+	(factory((global.d3 = global.d3 || {})));
+}(this, (function (exports) { 'use strict';
+
+var xhtml = "http://www.w3.org/1999/xhtml";
+
+var namespaces = {
+  svg: "http://www.w3.org/2000/svg",
+  xhtml: xhtml,
+  xlink: "http://www.w3.org/1999/xlink",
+  xml: "http://www.w3.org/XML/1998/namespace",
+  xmlns: "http://www.w3.org/2000/xmlns/"
+};
+
+var namespace = function(name) {
+  var prefix = name += "", i = prefix.indexOf(":");
+  if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
+  return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name;
+};
+
+function creatorInherit(name) {
+  return function() {
+    var document = this.ownerDocument,
+        uri = this.namespaceURI;
+    return uri === xhtml && document.documentElement.namespaceURI === xhtml
+        ? document.createElement(name)
+        : document.createElementNS(uri, name);
+  };
+}
+
+function creatorFixed(fullname) {
+  return function() {
+    return this.ownerDocument.createElementNS(fullname.space, fullname.local);
+  };
+}
+
+var creator = function(name) {
+  var fullname = namespace(name);
+  return (fullname.local
+      ? creatorFixed
+      : creatorInherit)(fullname);
+};
+
+var nextId = 0;
+
+function local() {
+  return new Local;
+}
+
+function Local() {
+  this._ = "@" + (++nextId).toString(36);
+}
+
+Local.prototype = local.prototype = {
+  constructor: Local,
+  get: function(node) {
+    var id = this._;
+    while (!(id in node)) if (!(node = node.parentNode)) return;
+    return node[id];
+  },
+  set: function(node, value) {
+    return node[this._] = value;
+  },
+  remove: function(node) {
+    return this._ in node && delete node[this._];
+  },
+  toString: function() {
+    return this._;
+  }
+};
+
+var matcher = function(selector) {
+  return function() {
+    return this.matches(selector);
+  };
+};
+
+if (typeof document !== "undefined") {
+  var element = document.documentElement;
+  if (!element.matches) {
+    var vendorMatches = element.webkitMatchesSelector
+        || element.msMatchesSelector
+        || element.mozMatchesSelector
+        || element.oMatchesSelector;
+    matcher = function(selector) {
+      return function() {
+        return vendorMatches.call(this, selector);
+      };
+    };
+  }
+}
+
+var matcher$1 = matcher;
+
+var filterEvents = {};
+
+exports.event = null;
+
+if (typeof document !== "undefined") {
+  var element$1 = document.documentElement;
+  if (!("onmouseenter" in element$1)) {
+    filterEvents = {mouseenter: "mouseover", mouseleave: "mouseout"};
+  }
+}
+
+function filterContextListener(listener, index, group) {
+  listener = contextListener(listener, index, group);
+  return function(event) {
+    var related = event.relatedTarget;
+    if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {
+      listener.call(this, event);
+    }
+  };
+}
+
+function contextListener(listener, index, group) {
+  return function(event1) {
+    var event0 = exports.event; // Events can be reentrant (e.g., focus).
+    exports.event = event1;
+    try {
+      listener.call(this, this.__data__, index, group);
+    } finally {
+      exports.event = event0;
+    }
+  };
+}
+
+function parseTypenames(typenames) {
+  return typenames.trim().split(/^|\s+/).map(function(t) {
+    var name = "", i = t.indexOf(".");
+    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+    return {type: t, name: name};
+  });
+}
+
+function onRemove(typename) {
+  return function() {
+    var on = this.__on;
+    if (!on) return;
+    for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
+      if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
+        this.removeEventListener(o.type, o.listener, o.capture);
+      } else {
+        on[++i] = o;
+      }
+    }
+    if (++i) on.length = i;
+    else delete this.__on;
+  };
+}
+
+function onAdd(typename, value, capture) {
+  var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
+  return function(d, i, group) {
+    var on = this.__on, o, listener = wrap(value, i, group);
+    if (on) for (var j = 0, m = on.length; j < m; ++j) {
+      if ((o = on[j]).type === typename.type && o.name === typename.name) {
+        this.removeEventListener(o.type, o.listener, o.capture);
+        this.addEventListener(o.type, o.listener = listener, o.capture = capture);
+        o.value = value;
+        return;
+      }
+    }
+    this.addEventListener(typename.type, listener, capture);
+    o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};
+    if (!on) this.__on = [o];
+    else on.push(o);
+  };
+}
+
+var selection_on = function(typename, value, capture) {
+  var typenames = parseTypenames(typename + ""), i, n = typenames.length, t;
+
+  if (arguments.length < 2) {
+    var on = this.node().__on;
+    if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
+      for (i = 0, o = on[j]; i < n; ++i) {
+        if ((t = typenames[i]).type === o.type && t.name === o.name) {
+          return o.value;
+        }
+      }
+    }
+    return;
+  }
+
+  on = value ? onAdd : onRemove;
+  if (capture == null) capture = false;
+  for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));
+  return this;
+};
+
+function customEvent(event1, listener, that, args) {
+  var event0 = exports.event;
+  event1.sourceEvent = exports.event;
+  exports.event = event1;
+  try {
+    return listener.apply(that, args);
+  } finally {
+    exports.event = event0;
+  }
+}
+
+var sourceEvent = function() {
+  var current = exports.event, source;
+  while (source = current.sourceEvent) current = source;
+  return current;
+};
+
+var point = function(node, event) {
+  var svg = node.ownerSVGElement || node;
+
+  if (svg.createSVGPoint) {
+    var point = svg.createSVGPoint();
+    point.x = event.clientX, point.y = event.clientY;
+    point = point.matrixTransform(node.getScreenCTM().inverse());
+    return [point.x, point.y];
+  }
+
+  var rect = node.getBoundingClientRect();
+  return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
+};
+
+var mouse = function(node) {
+  var event = sourceEvent();
+  if (event.changedTouches) event = event.changedTouches[0];
+  return point(node, event);
+};
+
+function none() {}
+
+var selector = function(selector) {
+  return selector == null ? none : function() {
+    return this.querySelector(selector);
+  };
+};
+
+var selection_select = function(select) {
+  if (typeof select !== "function") select = selector(select);
+
+  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
+      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
+        if ("__data__" in node) subnode.__data__ = node.__data__;
+        subgroup[i] = subnode;
+      }
+    }
+  }
+
+  return new Selection(subgroups, this._parents);
+};
+
+function empty() {
+  return [];
+}
+
+var selectorAll = function(selector) {
+  return selector == null ? empty : function() {
+    return this.querySelectorAll(selector);
+  };
+};
+
+var selection_selectAll = function(select) {
+  if (typeof select !== "function") select = selectorAll(select);
+
+  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+      if (node = group[i]) {
+        subgroups.push(select.call(node, node.__data__, i, group));
+        parents.push(node);
+      }
+    }
+  }
+
+  return new Selection(subgroups, parents);
+};
+
+var selection_filter = function(match) {
+  if (typeof match !== "function") match = matcher$1(match);
+
+  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
+      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
+        subgroup.push(node);
+      }
+    }
+  }
+
+  return new Selection(subgroups, this._parents);
+};
+
+var sparse = function(update) {
+  return new Array(update.length);
+};
+
+var selection_enter = function() {
+  return new Selection(this._enter || this._groups.map(sparse), this._parents);
+};
+
+function EnterNode(parent, datum) {
+  this.ownerDocument = parent.ownerDocument;
+  this.namespaceURI = parent.namespaceURI;
+  this._next = null;
+  this._parent = parent;
+  this.__data__ = datum;
+}
+
+EnterNode.prototype = {
+  constructor: EnterNode,
+  appendChild: function(child) { return this._parent.insertBefore(child, this._next); },
+  insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },
+  querySelector: function(selector) { return this._parent.querySelector(selector); },
+  querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }
+};
+
+var constant = function(x) {
+  return function() {
+    return x;
+  };
+};
+
+var keyPrefix = "$"; // Protect against keys like “__proto__”.
+
+function bindIndex(parent, group, enter, update, exit, data) {
+  var i = 0,
+      node,
+      groupLength = group.length,
+      dataLength = data.length;
+
+  // Put any non-null nodes that fit into update.
+  // Put any null nodes into enter.
+  // Put any remaining data into enter.
+  for (; i < dataLength; ++i) {
+    if (node = group[i]) {
+      node.__data__ = data[i];
+      update[i] = node;
+    } else {
+      enter[i] = new EnterNode(parent, data[i]);
+    }
+  }
+
+  // Put any non-null nodes that don’t fit into exit.
+  for (; i < groupLength; ++i) {
+    if (node = group[i]) {
+      exit[i] = node;
+    }
+  }
+}
+
+function bindKey(parent, group, enter, update, exit, data, key) {
+  var i,
+      node,
+      nodeByKeyValue = {},
+      groupLength = group.length,
+      dataLength = data.length,
+      keyValues = new Array(groupLength),
+      keyValue;
+
+  // Compute the key for each node.
+  // If multiple nodes have the same key, the duplicates are added to exit.
+  for (i = 0; i < groupLength; ++i) {
+    if (node = group[i]) {
+      keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);
+      if (keyValue in nodeByKeyValue) {
+        exit[i] = node;
+      } else {
+        nodeByKeyValue[keyValue] = node;
+      }
+    }
+  }
+
+  // Compute the key for each datum.
+  // If there a node associated with this key, join and add it to update.
+  // If there is not (or the key is a duplicate), add it to enter.
+  for (i = 0; i < dataLength; ++i) {
+    keyValue = keyPrefix + key.call(parent, data[i], i, data);
+    if (node = nodeByKeyValue[keyValue]) {
+      update[i] = node;
+      node.__data__ = data[i];
+      nodeByKeyValue[keyValue] = null;
+    } else {
+      enter[i] = new EnterNode(parent, data[i]);
+    }
+  }
+
+  // Add any remaining nodes that were not bound to data to exit.
+  for (i = 0; i < groupLength; ++i) {
+    if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {
+      exit[i] = node;
+    }
+  }
+}
+
+var selection_data = function(value, key) {
+  if (!value) {
+    data = new Array(this.size()), j = -1;
+    this.each(function(d) { data[++j] = d; });
+    return data;
+  }
+
+  var bind = key ? bindKey : bindIndex,
+      parents = this._parents,
+      groups = this._groups;
+
+  if (typeof value !== "function") value = constant(value);
+
+  for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
+    var parent = parents[j],
+        group = groups[j],
+        groupLength = group.length,
+        data = value.call(parent, parent && parent.__data__, j, parents),
+        dataLength = data.length,
+        enterGroup = enter[j] = new Array(dataLength),
+        updateGroup = update[j] = new Array(dataLength),
+        exitGroup = exit[j] = new Array(groupLength);
+
+    bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);
+
+    // Now connect the enter nodes to their following update node, such that
+    // appendChild can insert the materialized enter node before this node,
+    // rather than at the end of the parent node.
+    for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
+      if (previous = enterGroup[i0]) {
+        if (i0 >= i1) i1 = i0 + 1;
+        while (!(next = updateGroup[i1]) && ++i1 < dataLength);
+        previous._next = next || null;
+      }
+    }
+  }
+
+  update = new Selection(update, parents);
+  update._enter = enter;
+  update._exit = exit;
+  return update;
+};
+
+var selection_exit = function() {
+  return new Selection(this._exit || this._groups.map(sparse), this._parents);
+};
+
+var selection_merge = function(selection) {
+
+  for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
+      if (node = group0[i] || group1[i]) {
+        merge[i] = node;
+      }
+    }
+  }
+
+  for (; j < m0; ++j) {
+    merges[j] = groups0[j];
+  }
+
+  return new Selection(merges, this._parents);
+};
+
+var selection_order = function() {
+
+  for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
+    for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
+      if (node = group[i]) {
+        if (next && next !== node.nextSibling) next.parentNode.insertBefore(node, next);
+        next = node;
+      }
+    }
+  }
+
+  return this;
+};
+
+var selection_sort = function(compare) {
+  if (!compare) compare = ascending;
+
+  function compareNode(a, b) {
+    return a && b ? compare(a.__data__, b.__data__) : !a - !b;
+  }
+
+  for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
+      if (node = group[i]) {
+        sortgroup[i] = node;
+      }
+    }
+    sortgroup.sort(compareNode);
+  }
+
+  return new Selection(sortgroups, this._parents).order();
+};
+
+function ascending(a, b) {
+  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
+}
+
+var selection_call = function() {
+  var callback = arguments[0];
+  arguments[0] = this;
+  callback.apply(null, arguments);
+  return this;
+};
+
+var selection_nodes = function() {
+  var nodes = new Array(this.size()), i = -1;
+  this.each(function() { nodes[++i] = this; });
+  return nodes;
+};
+
+var selection_node = function() {
+
+  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+    for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
+      var node = group[i];
+      if (node) return node;
+    }
+  }
+
+  return null;
+};
+
+var selection_size = function() {
+  var size = 0;
+  this.each(function() { ++size; });
+  return size;
+};
+
+var selection_empty = function() {
+  return !this.node();
+};
+
+var selection_each = function(callback) {
+
+  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+    for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
+      if (node = group[i]) callback.call(node, node.__data__, i, group);
+    }
+  }
+
+  return this;
+};
+
+function attrRemove(name) {
+  return function() {
+    this.removeAttribute(name);
+  };
+}
+
+function attrRemoveNS(fullname) {
+  return function() {
+    this.removeAttributeNS(fullname.space, fullname.local);
+  };
+}
+
+function attrConstant(name, value) {
+  return function() {
+    this.setAttribute(name, value);
+  };
+}
+
+function attrConstantNS(fullname, value) {
+  return function() {
+    this.setAttributeNS(fullname.space, fullname.local, value);
+  };
+}
+
+function attrFunction(name, value) {
+  return function() {
+    var v = value.apply(this, arguments);
+    if (v == null) this.removeAttribute(name);
+    else this.setAttribute(name, v);
+  };
+}
+
+function attrFunctionNS(fullname, value) {
+  return function() {
+    var v = value.apply(this, arguments);
+    if (v == null) this.removeAttributeNS(fullname.space, fullname.local);
+    else this.setAttributeNS(fullname.space, fullname.local, v);
+  };
+}
+
+var selection_attr = function(name, value) {
+  var fullname = namespace(name);
+
+  if (arguments.length < 2) {
+    var node = this.node();
+    return fullname.local
+        ? node.getAttributeNS(fullname.space, fullname.local)
+        : node.getAttribute(fullname);
+  }
+
+  return this.each((value == null
+      ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === "function"
+      ? (fullname.local ? attrFunctionNS : attrFunction)
+      : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));
+};
+
+var defaultView = function(node) {
+  return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node
+      || (node.document && node) // node is a Window
+      || node.defaultView; // node is a Document
+};
+
+function styleRemove(name) {
+  return function() {
+    this.style.removeProperty(name);
+  };
+}
+
+function styleConstant(name, value, priority) {
+  return function() {
+    this.style.setProperty(name, value, priority);
+  };
+}
+
+function styleFunction(name, value, priority) {
+  return function() {
+    var v = value.apply(this, arguments);
+    if (v == null) this.style.removeProperty(name);
+    else this.style.setProperty(name, v, priority);
+  };
+}
+
+var selection_style = function(name, value, priority) {
+  return arguments.length > 1
+      ? this.each((value == null
+            ? styleRemove : typeof value === "function"
+            ? styleFunction
+            : styleConstant)(name, value, priority == null ? "" : priority))
+      : styleValue(this.node(), name);
+};
+
+function styleValue(node, name) {
+  return node.style.getPropertyValue(name)
+      || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);
+}
+
+function propertyRemove(name) {
+  return function() {
+    delete this[name];
+  };
+}
+
+function propertyConstant(name, value) {
+  return function() {
+    this[name] = value;
+  };
+}
+
+function propertyFunction(name, value) {
+  return function() {
+    var v = value.apply(this, arguments);
+    if (v == null) delete this[name];
+    else this[name] = v;
+  };
+}
+
+var selection_property = function(name, value) {
+  return arguments.length > 1
+      ? this.each((value == null
+          ? propertyRemove : typeof value === "function"
+          ? propertyFunction
+          : propertyConstant)(name, value))
+      : this.node()[name];
+};
+
+function classArray(string) {
+  return string.trim().split(/^|\s+/);
+}
+
+function classList(node) {
+  return node.classList || new ClassList(node);
+}
+
+function ClassList(node) {
+  this._node = node;
+  this._names = classArray(node.getAttribute("class") || "");
+}
+
+ClassList.prototype = {
+  add: function(name) {
+    var i = this._names.indexOf(name);
+    if (i < 0) {
+      this._names.push(name);
+      this._node.setAttribute("class", this._names.join(" "));
+    }
+  },
+  remove: function(name) {
+    var i = this._names.indexOf(name);
+    if (i >= 0) {
+      this._names.splice(i, 1);
+      this._node.setAttribute("class", this._names.join(" "));
+    }
+  },
+  contains: function(name) {
+    return this._names.indexOf(name) >= 0;
+  }
+};
+
+function classedAdd(node, names) {
+  var list = classList(node), i = -1, n = names.length;
+  while (++i < n) list.add(names[i]);
+}
+
+function classedRemove(node, names) {
+  var list = classList(node), i = -1, n = names.length;
+  while (++i < n) list.remove(names[i]);
+}
+
+function classedTrue(names) {
+  return function() {
+    classedAdd(this, names);
+  };
+}
+
+function classedFalse(names) {
+  return function() {
+    classedRemove(this, names);
+  };
+}
+
+function classedFunction(names, value) {
+  return function() {
+    (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
+  };
+}
+
+var selection_classed = function(name, value) {
+  var names = classArray(name + "");
+
+  if (arguments.length < 2) {
+    var list = classList(this.node()), i = -1, n = names.length;
+    while (++i < n) if (!list.contains(names[i])) return false;
+    return true;
+  }
+
+  return this.each((typeof value === "function"
+      ? classedFunction : value
+      ? classedTrue
+      : classedFalse)(names, value));
+};
+
+function textRemove() {
+  this.textContent = "";
+}
+
+function textConstant(value) {
+  return function() {
+    this.textContent = value;
+  };
+}
+
+function textFunction(value) {
+  return function() {
+    var v = value.apply(this, arguments);
+    this.textContent = v == null ? "" : v;
+  };
+}
+
+var selection_text = function(value) {
+  return arguments.length
+      ? this.each(value == null
+          ? textRemove : (typeof value === "function"
+          ? textFunction
+          : textConstant)(value))
+      : this.node().textContent;
+};
+
+function htmlRemove() {
+  this.innerHTML = "";
+}
+
+function htmlConstant(value) {
+  return function() {
+    this.innerHTML = value;
+  };
+}
+
+function htmlFunction(value) {
+  return function() {
+    var v = value.apply(this, arguments);
+    this.innerHTML = v == null ? "" : v;
+  };
+}
+
+var selection_html = function(value) {
+  return arguments.length
+      ? this.each(value == null
+          ? htmlRemove : (typeof value === "function"
+          ? htmlFunction
+          : htmlConstant)(value))
+      : this.node().innerHTML;
+};
+
+function raise() {
+  if (this.nextSibling) this.parentNode.appendChild(this);
+}
+
+var selection_raise = function() {
+  return this.each(raise);
+};
+
+function lower() {
+  if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
+}
+
+var selection_lower = function() {
+  return this.each(lower);
+};
+
+var selection_append = function(name) {
+  var create = typeof name === "function" ? name : creator(name);
+  return this.select(function() {
+    return this.appendChild(create.apply(this, arguments));
+  });
+};
+
+function constantNull() {
+  return null;
+}
+
+var selection_insert = function(name, before) {
+  var create = typeof name === "function" ? name : creator(name),
+      select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
+  return this.select(function() {
+    return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
+  });
+};
+
+function remove() {
+  var parent = this.parentNode;
+  if (parent) parent.removeChild(this);
+}
+
+var selection_remove = function() {
+  return this.each(remove);
+};
+
+var selection_datum = function(value) {
+  return arguments.length
+      ? this.property("__data__", value)
+      : this.node().__data__;
+};
+
+function dispatchEvent(node, type, params) {
+  var window = defaultView(node),
+      event = window.CustomEvent;
+
+  if (typeof event === "function") {
+    event = new event(type, params);
+  } else {
+    event = window.document.createEvent("Event");
+    if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;
+    else event.initEvent(type, false, false);
+  }
+
+  node.dispatchEvent(event);
+}
+
+function dispatchConstant(type, params) {
+  return function() {
+    return dispatchEvent(this, type, params);
+  };
+}
+
+function dispatchFunction(type, params) {
+  return function() {
+    return dispatchEvent(this, type, params.apply(this, arguments));
+  };
+}
+
+var selection_dispatch = function(type, params) {
+  return this.each((typeof params === "function"
+      ? dispatchFunction
+      : dispatchConstant)(type, params));
+};
+
+var root = [null];
+
+function Selection(groups, parents) {
+  this._groups = groups;
+  this._parents = parents;
+}
+
+function selection() {
+  return new Selection([[document.documentElement]], root);
+}
+
+Selection.prototype = selection.prototype = {
+  constructor: Selection,
+  select: selection_select,
+  selectAll: selection_selectAll,
+  filter: selection_filter,
+  data: selection_data,
+  enter: selection_enter,
+  exit: selection_exit,
+  merge: selection_merge,
+  order: selection_order,
+  sort: selection_sort,
+  call: selection_call,
+  nodes: selection_nodes,
+  node: selection_node,
+  size: selection_size,
+  empty: selection_empty,
+  each: selection_each,
+  attr: selection_attr,
+  style: selection_style,
+  property: selection_property,
+  classed: selection_classed,
+  text: selection_text,
+  html: selection_html,
+  raise: selection_raise,
+  lower: selection_lower,
+  append: selection_append,
+  insert: selection_insert,
+  remove: selection_remove,
+  datum: selection_datum,
+  on: selection_on,
+  dispatch: selection_dispatch
+};
+
+var select = function(selector) {
+  return typeof selector === "string"
+      ? new Selection([[document.querySelector(selector)]], [document.documentElement])
+      : new Selection([[selector]], root);
+};
+
+var selectAll = function(selector) {
+  return typeof selector === "string"
+      ? new Selection([document.querySelectorAll(selector)], [document.documentElement])
+      : new Selection([selector == null ? [] : selector], root);
+};
+
+var touch = function(node, touches, identifier) {
+  if (arguments.length < 3) identifier = touches, touches = sourceEvent().changedTouches;
+
+  for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {
+    if ((touch = touches[i]).identifier === identifier) {
+      return point(node, touch);
+    }
+  }
+
+  return null;
+};
+
+var touches = function(node, touches) {
+  if (touches == null) touches = sourceEvent().touches;
+
+  for (var i = 0, n = touches ? touches.length : 0, points = new Array(n); i < n; ++i) {
+    points[i] = point(node, touches[i]);
+  }
+
+  return points;
+};
+
+exports.creator = creator;
+exports.local = local;
+exports.matcher = matcher$1;
+exports.mouse = mouse;
+exports.namespace = namespace;
+exports.namespaces = namespaces;
+exports.select = select;
+exports.selectAll = selectAll;
+exports.selection = selection;
+exports.selector = selector;
+exports.selectorAll = selectorAll;
+exports.style = styleValue;
+exports.touch = touch;
+exports.touches = touches;
+exports.window = defaultView;
+exports.customEvent = customEvent;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+
+},{}],13:[function(require,module,exports){
+// https://d3js.org/d3-shape/ Version 1.2.0. Copyright 2017 Mike Bostock.
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-path')) :
+	typeof define === 'function' && define.amd ? define(['exports', 'd3-path'], factory) :
+	(factory((global.d3 = global.d3 || {}),global.d3));
+}(this, (function (exports,d3Path) { 'use strict';
+
+var constant = function(x) {
+  return function constant() {
+    return x;
+  };
+};
+
+var abs = Math.abs;
+var atan2 = Math.atan2;
+var cos = Math.cos;
+var max = Math.max;
+var min = Math.min;
+var sin = Math.sin;
+var sqrt = Math.sqrt;
+
+var epsilon = 1e-12;
+var pi = Math.PI;
+var halfPi = pi / 2;
+var tau = 2 * pi;
+
+function acos(x) {
+  return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);
+}
+
+function asin(x) {
+  return x >= 1 ? halfPi : x <= -1 ? -halfPi : Math.asin(x);
+}
+
+function arcInnerRadius(d) {
+  return d.innerRadius;
+}
+
+function arcOuterRadius(d) {
+  return d.outerRadius;
+}
+
+function arcStartAngle(d) {
+  return d.startAngle;
+}
+
+function arcEndAngle(d) {
+  return d.endAngle;
+}
+
+function arcPadAngle(d) {
+  return d && d.padAngle; // Note: optional!
+}
+
+function intersect(x0, y0, x1, y1, x2, y2, x3, y3) {
+  var x10 = x1 - x0, y10 = y1 - y0,
+      x32 = x3 - x2, y32 = y3 - y2,
+      t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / (y32 * x10 - x32 * y10);
+  return [x0 + t * x10, y0 + t * y10];
+}
+
+// Compute perpendicular offset line of length rc.
+// http://mathworld.wolfram.com/Circle-LineIntersection.html
+function cornerTangents(x0, y0, x1, y1, r1, rc, cw) {
+  var x01 = x0 - x1,
+      y01 = y0 - y1,
+      lo = (cw ? rc : -rc) / sqrt(x01 * x01 + y01 * y01),
+      ox = lo * y01,
+      oy = -lo * x01,
+      x11 = x0 + ox,
+      y11 = y0 + oy,
+      x10 = x1 + ox,
+      y10 = y1 + oy,
+      x00 = (x11 + x10) / 2,
+      y00 = (y11 + y10) / 2,
+      dx = x10 - x11,
+      dy = y10 - y11,
+      d2 = dx * dx + dy * dy,
+      r = r1 - rc,
+      D = x11 * y10 - x10 * y11,
+      d = (dy < 0 ? -1 : 1) * sqrt(max(0, r * r * d2 - D * D)),
+      cx0 = (D * dy - dx * d) / d2,
+      cy0 = (-D * dx - dy * d) / d2,
+      cx1 = (D * dy + dx * d) / d2,
+      cy1 = (-D * dx + dy * d) / d2,
+      dx0 = cx0 - x00,
+      dy0 = cy0 - y00,
+      dx1 = cx1 - x00,
+      dy1 = cy1 - y00;
+
+  // Pick the closer of the two intersection points.
+  // TODO Is there a faster way to determine which intersection to use?
+  if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1;
+
+  return {
+    cx: cx0,
+    cy: cy0,
+    x01: -ox,
+    y01: -oy,
+    x11: cx0 * (r1 / r - 1),
+    y11: cy0 * (r1 / r - 1)
+  };
+}
+
+var arc = function() {
+  var innerRadius = arcInnerRadius,
+      outerRadius = arcOuterRadius,
+      cornerRadius = constant(0),
+      padRadius = null,
+      startAngle = arcStartAngle,
+      endAngle = arcEndAngle,
+      padAngle = arcPadAngle,
+      context = null;
+
+  function arc() {
+    var buffer,
+        r,
+        r0 = +innerRadius.apply(this, arguments),
+        r1 = +outerRadius.apply(this, arguments),
+        a0 = startAngle.apply(this, arguments) - halfPi,
+        a1 = endAngle.apply(this, arguments) - halfPi,
+        da = abs(a1 - a0),
+        cw = a1 > a0;
+
+    if (!context) context = buffer = d3Path.path();
+
+    // Ensure that the outer radius is always larger than the inner radius.
+    if (r1 < r0) r = r1, r1 = r0, r0 = r;
+
+    // Is it a point?
+    if (!(r1 > epsilon)) context.moveTo(0, 0);
+
+    // Or is it a circle or annulus?
+    else if (da > tau - epsilon) {
+      context.moveTo(r1 * cos(a0), r1 * sin(a0));
+      context.arc(0, 0, r1, a0, a1, !cw);
+      if (r0 > epsilon) {
+        context.moveTo(r0 * cos(a1), r0 * sin(a1));
+        context.arc(0, 0, r0, a1, a0, cw);
+      }
+    }
+
+    // Or is it a circular or annular sector?
+    else {
+      var a01 = a0,
+          a11 = a1,
+          a00 = a0,
+          a10 = a1,
+          da0 = da,
+          da1 = da,
+          ap = padAngle.apply(this, arguments) / 2,
+          rp = (ap > epsilon) && (padRadius ? +padRadius.apply(this, arguments) : sqrt(r0 * r0 + r1 * r1)),
+          rc = min(abs(r1 - r0) / 2, +cornerRadius.apply(this, arguments)),
+          rc0 = rc,
+          rc1 = rc,
+          t0,
+          t1;
+
+      // Apply padding? Note that since r1 ≥ r0, da1 ≥ da0.
+      if (rp > epsilon) {
+        var p0 = asin(rp / r0 * sin(ap)),
+            p1 = asin(rp / r1 * sin(ap));
+        if ((da0 -= p0 * 2) > epsilon) p0 *= (cw ? 1 : -1), a00 += p0, a10 -= p0;
+        else da0 = 0, a00 = a10 = (a0 + a1) / 2;
+        if ((da1 -= p1 * 2) > epsilon) p1 *= (cw ? 1 : -1), a01 += p1, a11 -= p1;
+        else da1 = 0, a01 = a11 = (a0 + a1) / 2;
+      }
+
+      var x01 = r1 * cos(a01),
+          y01 = r1 * sin(a01),
+          x10 = r0 * cos(a10),
+          y10 = r0 * sin(a10);
+
+      // Apply rounded corners?
+      if (rc > epsilon) {
+        var x11 = r1 * cos(a11),
+            y11 = r1 * sin(a11),
+            x00 = r0 * cos(a00),
+            y00 = r0 * sin(a00);
+
+        // Restrict the corner radius according to the sector angle.
+        if (da < pi) {
+          var oc = da0 > epsilon ? intersect(x01, y01, x00, y00, x11, y11, x10, y10) : [x10, y10],
+              ax = x01 - oc[0],
+              ay = y01 - oc[1],
+              bx = x11 - oc[0],
+              by = y11 - oc[1],
+              kc = 1 / sin(acos((ax * bx + ay * by) / (sqrt(ax * ax + ay * ay) * sqrt(bx * bx + by * by))) / 2),
+              lc = sqrt(oc[0] * oc[0] + oc[1] * oc[1]);
+          rc0 = min(rc, (r0 - lc) / (kc - 1));
+          rc1 = min(rc, (r1 - lc) / (kc + 1));
+        }
+      }
+
+      // Is the sector collapsed to a line?
+      if (!(da1 > epsilon)) context.moveTo(x01, y01);
+
+      // Does the sector’s outer ring have rounded corners?
+      else if (rc1 > epsilon) {
+        t0 = cornerTangents(x00, y00, x01, y01, r1, rc1, cw);
+        t1 = cornerTangents(x11, y11, x10, y10, r1, rc1, cw);
+
+        context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01);
+
+        // Have the corners merged?
+        if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, atan2(t0.y01, t0.x01), atan2(t1.y01, t1.x01), !cw);
+
+        // Otherwise, draw the two corners and the ring.
+        else {
+          context.arc(t0.cx, t0.cy, rc1, atan2(t0.y01, t0.x01), atan2(t0.y11, t0.x11), !cw);
+          context.arc(0, 0, r1, atan2(t0.cy + t0.y11, t0.cx + t0.x11), atan2(t1.cy + t1.y11, t1.cx + t1.x11), !cw);
+          context.arc(t1.cx, t1.cy, rc1, atan2(t1.y11, t1.x11), atan2(t1.y01, t1.x01), !cw);
+        }
+      }
+
+      // Or is the outer ring just a circular arc?
+      else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw);
+
+      // Is there no inner ring, and it’s a circular sector?
+      // Or perhaps it’s an annular sector collapsed due to padding?
+      if (!(r0 > epsilon) || !(da0 > epsilon)) context.lineTo(x10, y10);
+
+      // Does the sector’s inner ring (or point) have rounded corners?
+      else if (rc0 > epsilon) {
+        t0 = cornerTangents(x10, y10, x11, y11, r0, -rc0, cw);
+        t1 = cornerTangents(x01, y01, x00, y00, r0, -rc0, cw);
+
+        context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01);
+
+        // Have the corners merged?
+        if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, atan2(t0.y01, t0.x01), atan2(t1.y01, t1.x01), !cw);
+
+        // Otherwise, draw the two corners and the ring.
+        else {
+          context.arc(t0.cx, t0.cy, rc0, atan2(t0.y01, t0.x01), atan2(t0.y11, t0.x11), !cw);
+          context.arc(0, 0, r0, atan2(t0.cy + t0.y11, t0.cx + t0.x11), atan2(t1.cy + t1.y11, t1.cx + t1.x11), cw);
+          context.arc(t1.cx, t1.cy, rc0, atan2(t1.y11, t1.x11), atan2(t1.y01, t1.x01), !cw);
+        }
+      }
+
+      // Or is the inner ring just a circular arc?
+      else context.arc(0, 0, r0, a10, a00, cw);
+    }
+
+    context.closePath();
+
+    if (buffer) return context = null, buffer + "" || null;
+  }
+
+  arc.centroid = function() {
+    var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2,
+        a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - pi / 2;
+    return [cos(a) * r, sin(a) * r];
+  };
+
+  arc.innerRadius = function(_) {
+    return arguments.length ? (innerRadius = typeof _ === "function" ? _ : constant(+_), arc) : innerRadius;
+  };
+
+  arc.outerRadius = function(_) {
+    return arguments.length ? (outerRadius = typeof _ === "function" ? _ : constant(+_), arc) : outerRadius;
+  };
+
+  arc.cornerRadius = function(_) {
+    return arguments.length ? (cornerRadius = typeof _ === "function" ? _ : constant(+_), arc) : cornerRadius;
+  };
+
+  arc.padRadius = function(_) {
+    return arguments.length ? (padRadius = _ == null ? null : typeof _ === "function" ? _ : constant(+_), arc) : padRadius;
+  };
+
+  arc.startAngle = function(_) {
+    return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant(+_), arc) : startAngle;
+  };
+
+  arc.endAngle = function(_) {
+    return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant(+_), arc) : endAngle;
+  };
+
+  arc.padAngle = function(_) {
+    return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant(+_), arc) : padAngle;
+  };
+
+  arc.context = function(_) {
+    return arguments.length ? ((context = _ == null ? null : _), arc) : context;
+  };
+
+  return arc;
+};
+
+function Linear(context) {
+  this._context = context;
+}
+
+Linear.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; // proceed
+      default: this._context.lineTo(x, y); break;
+    }
+  }
+};
+
+var curveLinear = function(context) {
+  return new Linear(context);
+};
+
+function x(p) {
+  return p[0];
+}
+
+function y(p) {
+  return p[1];
+}
+
+var line = function() {
+  var x$$1 = x,
+      y$$1 = y,
+      defined = constant(true),
+      context = null,
+      curve = curveLinear,
+      output = null;
+
+  function line(data) {
+    var i,
+        n = data.length,
+        d,
+        defined0 = false,
+        buffer;
+
+    if (context == null) output = curve(buffer = d3Path.path());
+
+    for (i = 0; i <= n; ++i) {
+      if (!(i < n && defined(d = data[i], i, data)) === defined0) {
+        if (defined0 = !defined0) output.lineStart();
+        else output.lineEnd();
+      }
+      if (defined0) output.point(+x$$1(d, i, data), +y$$1(d, i, data));
+    }
+
+    if (buffer) return output = null, buffer + "" || null;
+  }
+
+  line.x = function(_) {
+    return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant(+_), line) : x$$1;
+  };
+
+  line.y = function(_) {
+    return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant(+_), line) : y$$1;
+  };
+
+  line.defined = function(_) {
+    return arguments.length ? (defined = typeof _ === "function" ? _ : constant(!!_), line) : defined;
+  };
+
+  line.curve = function(_) {
+    return arguments.length ? (curve = _, context != null && (output = curve(context)), line) : curve;
+  };
+
+  line.context = function(_) {
+    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line) : context;
+  };
+
+  return line;
+};
+
+var area = function() {
+  var x0 = x,
+      x1 = null,
+      y0 = constant(0),
+      y1 = y,
+      defined = constant(true),
+      context = null,
+      curve = curveLinear,
+      output = null;
+
+  function area(data) {
+    var i,
+        j,
+        k,
+        n = data.length,
+        d,
+        defined0 = false,
+        buffer,
+        x0z = new Array(n),
+        y0z = new Array(n);
+
+    if (context == null) output = curve(buffer = d3Path.path());
+
+    for (i = 0; i <= n; ++i) {
+      if (!(i < n && defined(d = data[i], i, data)) === defined0) {
+        if (defined0 = !defined0) {
+          j = i;
+          output.areaStart();
+          output.lineStart();
+        } else {
+          output.lineEnd();
+          output.lineStart();
+          for (k = i - 1; k >= j; --k) {
+            output.point(x0z[k], y0z[k]);
+          }
+          output.lineEnd();
+          output.areaEnd();
+        }
+      }
+      if (defined0) {
+        x0z[i] = +x0(d, i, data), y0z[i] = +y0(d, i, data);
+        output.point(x1 ? +x1(d, i, data) : x0z[i], y1 ? +y1(d, i, data) : y0z[i]);
+      }
+    }
+
+    if (buffer) return output = null, buffer + "" || null;
+  }
+
+  function arealine() {
+    return line().defined(defined).curve(curve).context(context);
+  }
+
+  area.x = function(_) {
+    return arguments.length ? (x0 = typeof _ === "function" ? _ : constant(+_), x1 = null, area) : x0;
+  };
+
+  area.x0 = function(_) {
+    return arguments.length ? (x0 = typeof _ === "function" ? _ : constant(+_), area) : x0;
+  };
+
+  area.x1 = function(_) {
+    return arguments.length ? (x1 = _ == null ? null : typeof _ === "function" ? _ : constant(+_), area) : x1;
+  };
+
+  area.y = function(_) {
+    return arguments.length ? (y0 = typeof _ === "function" ? _ : constant(+_), y1 = null, area) : y0;
+  };
+
+  area.y0 = function(_) {
+    return arguments.length ? (y0 = typeof _ === "function" ? _ : constant(+_), area) : y0;
+  };
+
+  area.y1 = function(_) {
+    return arguments.length ? (y1 = _ == null ? null : typeof _ === "function" ? _ : constant(+_), area) : y1;
+  };
+
+  area.lineX0 =
+  area.lineY0 = function() {
+    return arealine().x(x0).y(y0);
+  };
+
+  area.lineY1 = function() {
+    return arealine().x(x0).y(y1);
+  };
+
+  area.lineX1 = function() {
+    return arealine().x(x1).y(y0);
+  };
+
+  area.defined = function(_) {
+    return arguments.length ? (defined = typeof _ === "function" ? _ : constant(!!_), area) : defined;
+  };
+
+  area.curve = function(_) {
+    return arguments.length ? (curve = _, context != null && (output = curve(context)), area) : curve;
+  };
+
+  area.context = function(_) {
+    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), area) : context;
+  };
+
+  return area;
+};
+
+var descending = function(a, b) {
+  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
+};
+
+var identity = function(d) {
+  return d;
+};
+
+var pie = function() {
+  var value = identity,
+      sortValues = descending,
+      sort = null,
+      startAngle = constant(0),
+      endAngle = constant(tau),
+      padAngle = constant(0);
+
+  function pie(data) {
+    var i,
+        n = data.length,
+        j,
+        k,
+        sum = 0,
+        index = new Array(n),
+        arcs = new Array(n),
+        a0 = +startAngle.apply(this, arguments),
+        da = Math.min(tau, Math.max(-tau, endAngle.apply(this, arguments) - a0)),
+        a1,
+        p = Math.min(Math.abs(da) / n, padAngle.apply(this, arguments)),
+        pa = p * (da < 0 ? -1 : 1),
+        v;
+
+    for (i = 0; i < n; ++i) {
+      if ((v = arcs[index[i] = i] = +value(data[i], i, data)) > 0) {
+        sum += v;
+      }
+    }
+
+    // Optionally sort the arcs by previously-computed values or by data.
+    if (sortValues != null) index.sort(function(i, j) { return sortValues(arcs[i], arcs[j]); });
+    else if (sort != null) index.sort(function(i, j) { return sort(data[i], data[j]); });
+
+    // Compute the arcs! They are stored in the original data's order.
+    for (i = 0, k = sum ? (da - n * pa) / sum : 0; i < n; ++i, a0 = a1) {
+      j = index[i], v = arcs[j], a1 = a0 + (v > 0 ? v * k : 0) + pa, arcs[j] = {
+        data: data[j],
+        index: i,
+        value: v,
+        startAngle: a0,
+        endAngle: a1,
+        padAngle: p
+      };
+    }
+
+    return arcs;
+  }
+
+  pie.value = function(_) {
+    return arguments.length ? (value = typeof _ === "function" ? _ : constant(+_), pie) : value;
+  };
+
+  pie.sortValues = function(_) {
+    return arguments.length ? (sortValues = _, sort = null, pie) : sortValues;
+  };
+
+  pie.sort = function(_) {
+    return arguments.length ? (sort = _, sortValues = null, pie) : sort;
+  };
+
+  pie.startAngle = function(_) {
+    return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant(+_), pie) : startAngle;
+  };
+
+  pie.endAngle = function(_) {
+    return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant(+_), pie) : endAngle;
+  };
+
+  pie.padAngle = function(_) {
+    return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant(+_), pie) : padAngle;
+  };
+
+  return pie;
+};
+
+var curveRadialLinear = curveRadial(curveLinear);
+
+function Radial(curve) {
+  this._curve = curve;
+}
+
+Radial.prototype = {
+  areaStart: function() {
+    this._curve.areaStart();
+  },
+  areaEnd: function() {
+    this._curve.areaEnd();
+  },
+  lineStart: function() {
+    this._curve.lineStart();
+  },
+  lineEnd: function() {
+    this._curve.lineEnd();
+  },
+  point: function(a, r) {
+    this._curve.point(r * Math.sin(a), r * -Math.cos(a));
+  }
+};
+
+function curveRadial(curve) {
+
+  function radial(context) {
+    return new Radial(curve(context));
+  }
+
+  radial._curve = curve;
+
+  return radial;
+}
+
+function lineRadial(l) {
+  var c = l.curve;
+
+  l.angle = l.x, delete l.x;
+  l.radius = l.y, delete l.y;
+
+  l.curve = function(_) {
+    return arguments.length ? c(curveRadial(_)) : c()._curve;
+  };
+
+  return l;
+}
+
+var lineRadial$1 = function() {
+  return lineRadial(line().curve(curveRadialLinear));
+};
+
+var areaRadial = function() {
+  var a = area().curve(curveRadialLinear),
+      c = a.curve,
+      x0 = a.lineX0,
+      x1 = a.lineX1,
+      y0 = a.lineY0,
+      y1 = a.lineY1;
+
+  a.angle = a.x, delete a.x;
+  a.startAngle = a.x0, delete a.x0;
+  a.endAngle = a.x1, delete a.x1;
+  a.radius = a.y, delete a.y;
+  a.innerRadius = a.y0, delete a.y0;
+  a.outerRadius = a.y1, delete a.y1;
+  a.lineStartAngle = function() { return lineRadial(x0()); }, delete a.lineX0;
+  a.lineEndAngle = function() { return lineRadial(x1()); }, delete a.lineX1;
+  a.lineInnerRadius = function() { return lineRadial(y0()); }, delete a.lineY0;
+  a.lineOuterRadius = function() { return lineRadial(y1()); }, delete a.lineY1;
+
+  a.curve = function(_) {
+    return arguments.length ? c(curveRadial(_)) : c()._curve;
+  };
+
+  return a;
+};
+
+var pointRadial = function(x, y) {
+  return [(y = +y) * Math.cos(x -= Math.PI / 2), y * Math.sin(x)];
+};
+
+var slice = Array.prototype.slice;
+
+function linkSource(d) {
+  return d.source;
+}
+
+function linkTarget(d) {
+  return d.target;
+}
+
+function link(curve) {
+  var source = linkSource,
+      target = linkTarget,
+      x$$1 = x,
+      y$$1 = y,
+      context = null;
+
+  function link() {
+    var buffer, argv = slice.call(arguments), s = source.apply(this, argv), t = target.apply(this, argv);
+    if (!context) context = buffer = d3Path.path();
+    curve(context, +x$$1.apply(this, (argv[0] = s, argv)), +y$$1.apply(this, argv), +x$$1.apply(this, (argv[0] = t, argv)), +y$$1.apply(this, argv));
+    if (buffer) return context = null, buffer + "" || null;
+  }
+
+  link.source = function(_) {
+    return arguments.length ? (source = _, link) : source;
+  };
+
+  link.target = function(_) {
+    return arguments.length ? (target = _, link) : target;
+  };
+
+  link.x = function(_) {
+    return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant(+_), link) : x$$1;
+  };
+
+  link.y = function(_) {
+    return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant(+_), link) : y$$1;
+  };
+
+  link.context = function(_) {
+    return arguments.length ? ((context = _ == null ? null : _), link) : context;
+  };
+
+  return link;
+}
+
+function curveHorizontal(context, x0, y0, x1, y1) {
+  context.moveTo(x0, y0);
+  context.bezierCurveTo(x0 = (x0 + x1) / 2, y0, x0, y1, x1, y1);
+}
+
+function curveVertical(context, x0, y0, x1, y1) {
+  context.moveTo(x0, y0);
+  context.bezierCurveTo(x0, y0 = (y0 + y1) / 2, x1, y0, x1, y1);
+}
+
+function curveRadial$1(context, x0, y0, x1, y1) {
+  var p0 = pointRadial(x0, y0),
+      p1 = pointRadial(x0, y0 = (y0 + y1) / 2),
+      p2 = pointRadial(x1, y0),
+      p3 = pointRadial(x1, y1);
+  context.moveTo(p0[0], p0[1]);
+  context.bezierCurveTo(p1[0], p1[1], p2[0], p2[1], p3[0], p3[1]);
+}
+
+function linkHorizontal() {
+  return link(curveHorizontal);
+}
+
+function linkVertical() {
+  return link(curveVertical);
+}
+
+function linkRadial() {
+  var l = link(curveRadial$1);
+  l.angle = l.x, delete l.x;
+  l.radius = l.y, delete l.y;
+  return l;
+}
+
+var circle = {
+  draw: function(context, size) {
+    var r = Math.sqrt(size / pi);
+    context.moveTo(r, 0);
+    context.arc(0, 0, r, 0, tau);
+  }
+};
+
+var cross = {
+  draw: function(context, size) {
+    var r = Math.sqrt(size / 5) / 2;
+    context.moveTo(-3 * r, -r);
+    context.lineTo(-r, -r);
+    context.lineTo(-r, -3 * r);
+    context.lineTo(r, -3 * r);
+    context.lineTo(r, -r);
+    context.lineTo(3 * r, -r);
+    context.lineTo(3 * r, r);
+    context.lineTo(r, r);
+    context.lineTo(r, 3 * r);
+    context.lineTo(-r, 3 * r);
+    context.lineTo(-r, r);
+    context.lineTo(-3 * r, r);
+    context.closePath();
+  }
+};
+
+var tan30 = Math.sqrt(1 / 3);
+var tan30_2 = tan30 * 2;
+
+var diamond = {
+  draw: function(context, size) {
+    var y = Math.sqrt(size / tan30_2),
+        x = y * tan30;
+    context.moveTo(0, -y);
+    context.lineTo(x, 0);
+    context.lineTo(0, y);
+    context.lineTo(-x, 0);
+    context.closePath();
+  }
+};
+
+var ka = 0.89081309152928522810;
+var kr = Math.sin(pi / 10) / Math.sin(7 * pi / 10);
+var kx = Math.sin(tau / 10) * kr;
+var ky = -Math.cos(tau / 10) * kr;
+
+var star = {
+  draw: function(context, size) {
+    var r = Math.sqrt(size * ka),
+        x = kx * r,
+        y = ky * r;
+    context.moveTo(0, -r);
+    context.lineTo(x, y);
+    for (var i = 1; i < 5; ++i) {
+      var a = tau * i / 5,
+          c = Math.cos(a),
+          s = Math.sin(a);
+      context.lineTo(s * r, -c * r);
+      context.lineTo(c * x - s * y, s * x + c * y);
+    }
+    context.closePath();
+  }
+};
+
+var square = {
+  draw: function(context, size) {
+    var w = Math.sqrt(size),
+        x = -w / 2;
+    context.rect(x, x, w, w);
+  }
+};
+
+var sqrt3 = Math.sqrt(3);
+
+var triangle = {
+  draw: function(context, size) {
+    var y = -Math.sqrt(size / (sqrt3 * 3));
+    context.moveTo(0, y * 2);
+    context.lineTo(-sqrt3 * y, -y);
+    context.lineTo(sqrt3 * y, -y);
+    context.closePath();
+  }
+};
+
+var c = -0.5;
+var s = Math.sqrt(3) / 2;
+var k = 1 / Math.sqrt(12);
+var a = (k / 2 + 1) * 3;
+
+var wye = {
+  draw: function(context, size) {
+    var r = Math.sqrt(size / a),
+        x0 = r / 2,
+        y0 = r * k,
+        x1 = x0,
+        y1 = r * k + r,
+        x2 = -x1,
+        y2 = y1;
+    context.moveTo(x0, y0);
+    context.lineTo(x1, y1);
+    context.lineTo(x2, y2);
+    context.lineTo(c * x0 - s * y0, s * x0 + c * y0);
+    context.lineTo(c * x1 - s * y1, s * x1 + c * y1);
+    context.lineTo(c * x2 - s * y2, s * x2 + c * y2);
+    context.lineTo(c * x0 + s * y0, c * y0 - s * x0);
+    context.lineTo(c * x1 + s * y1, c * y1 - s * x1);
+    context.lineTo(c * x2 + s * y2, c * y2 - s * x2);
+    context.closePath();
+  }
+};
+
+var symbols = [
+  circle,
+  cross,
+  diamond,
+  square,
+  star,
+  triangle,
+  wye
+];
+
+var symbol = function() {
+  var type = constant(circle),
+      size = constant(64),
+      context = null;
+
+  function symbol() {
+    var buffer;
+    if (!context) context = buffer = d3Path.path();
+    type.apply(this, arguments).draw(context, +size.apply(this, arguments));
+    if (buffer) return context = null, buffer + "" || null;
+  }
+
+  symbol.type = function(_) {
+    return arguments.length ? (type = typeof _ === "function" ? _ : constant(_), symbol) : type;
+  };
+
+  symbol.size = function(_) {
+    return arguments.length ? (size = typeof _ === "function" ? _ : constant(+_), symbol) : size;
+  };
+
+  symbol.context = function(_) {
+    return arguments.length ? (context = _ == null ? null : _, symbol) : context;
+  };
+
+  return symbol;
+};
+
+var noop = function() {};
+
+function point(that, x, y) {
+  that._context.bezierCurveTo(
+    (2 * that._x0 + that._x1) / 3,
+    (2 * that._y0 + that._y1) / 3,
+    (that._x0 + 2 * that._x1) / 3,
+    (that._y0 + 2 * that._y1) / 3,
+    (that._x0 + 4 * that._x1 + x) / 6,
+    (that._y0 + 4 * that._y1 + y) / 6
+  );
+}
+
+function Basis(context) {
+  this._context = context;
+}
+
+Basis.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 =
+    this._y0 = this._y1 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 3: point(this, this._x1, this._y1); // proceed
+      case 2: this._context.lineTo(this._x1, this._y1); break;
+    }
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; this._context.lineTo((5 * this._x0 + this._x1) / 6, (5 * this._y0 + this._y1) / 6); // proceed
+      default: point(this, x, y); break;
+    }
+    this._x0 = this._x1, this._x1 = x;
+    this._y0 = this._y1, this._y1 = y;
+  }
+};
+
+var basis = function(context) {
+  return new Basis(context);
+};
+
+function BasisClosed(context) {
+  this._context = context;
+}
+
+BasisClosed.prototype = {
+  areaStart: noop,
+  areaEnd: noop,
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 =
+    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 1: {
+        this._context.moveTo(this._x2, this._y2);
+        this._context.closePath();
+        break;
+      }
+      case 2: {
+        this._context.moveTo((this._x2 + 2 * this._x3) / 3, (this._y2 + 2 * this._y3) / 3);
+        this._context.lineTo((this._x3 + 2 * this._x2) / 3, (this._y3 + 2 * this._y2) / 3);
+        this._context.closePath();
+        break;
+      }
+      case 3: {
+        this.point(this._x2, this._y2);
+        this.point(this._x3, this._y3);
+        this.point(this._x4, this._y4);
+        break;
+      }
+    }
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._x2 = x, this._y2 = y; break;
+      case 1: this._point = 2; this._x3 = x, this._y3 = y; break;
+      case 2: this._point = 3; this._x4 = x, this._y4 = y; this._context.moveTo((this._x0 + 4 * this._x1 + x) / 6, (this._y0 + 4 * this._y1 + y) / 6); break;
+      default: point(this, x, y); break;
+    }
+    this._x0 = this._x1, this._x1 = x;
+    this._y0 = this._y1, this._y1 = y;
+  }
+};
+
+var basisClosed = function(context) {
+  return new BasisClosed(context);
+};
+
+function BasisOpen(context) {
+  this._context = context;
+}
+
+BasisOpen.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 =
+    this._y0 = this._y1 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; var x0 = (this._x0 + 4 * this._x1 + x) / 6, y0 = (this._y0 + 4 * this._y1 + y) / 6; this._line ? this._context.lineTo(x0, y0) : this._context.moveTo(x0, y0); break;
+      case 3: this._point = 4; // proceed
+      default: point(this, x, y); break;
+    }
+    this._x0 = this._x1, this._x1 = x;
+    this._y0 = this._y1, this._y1 = y;
+  }
+};
+
+var basisOpen = function(context) {
+  return new BasisOpen(context);
+};
+
+function Bundle(context, beta) {
+  this._basis = new Basis(context);
+  this._beta = beta;
+}
+
+Bundle.prototype = {
+  lineStart: function() {
+    this._x = [];
+    this._y = [];
+    this._basis.lineStart();
+  },
+  lineEnd: function() {
+    var x = this._x,
+        y = this._y,
+        j = x.length - 1;
+
+    if (j > 0) {
+      var x0 = x[0],
+          y0 = y[0],
+          dx = x[j] - x0,
+          dy = y[j] - y0,
+          i = -1,
+          t;
+
+      while (++i <= j) {
+        t = i / j;
+        this._basis.point(
+          this._beta * x[i] + (1 - this._beta) * (x0 + t * dx),
+          this._beta * y[i] + (1 - this._beta) * (y0 + t * dy)
+        );
+      }
+    }
+
+    this._x = this._y = null;
+    this._basis.lineEnd();
+  },
+  point: function(x, y) {
+    this._x.push(+x);
+    this._y.push(+y);
+  }
+};
+
+var bundle = ((function custom(beta) {
+
+  function bundle(context) {
+    return beta === 1 ? new Basis(context) : new Bundle(context, beta);
+  }
+
+  bundle.beta = function(beta) {
+    return custom(+beta);
+  };
+
+  return bundle;
+}))(0.85);
+
+function point$1(that, x, y) {
+  that._context.bezierCurveTo(
+    that._x1 + that._k * (that._x2 - that._x0),
+    that._y1 + that._k * (that._y2 - that._y0),
+    that._x2 + that._k * (that._x1 - x),
+    that._y2 + that._k * (that._y1 - y),
+    that._x2,
+    that._y2
+  );
+}
+
+function Cardinal(context, tension) {
+  this._context = context;
+  this._k = (1 - tension) / 6;
+}
+
+Cardinal.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 =
+    this._y0 = this._y1 = this._y2 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 2: this._context.lineTo(this._x2, this._y2); break;
+      case 3: point$1(this, this._x1, this._y1); break;
+    }
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; this._x1 = x, this._y1 = y; break;
+      case 2: this._point = 3; // proceed
+      default: point$1(this, x, y); break;
+    }
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
+
+var cardinal = ((function custom(tension) {
+
+  function cardinal(context) {
+    return new Cardinal(context, tension);
+  }
+
+  cardinal.tension = function(tension) {
+    return custom(+tension);
+  };
+
+  return cardinal;
+}))(0);
+
+function CardinalClosed(context, tension) {
+  this._context = context;
+  this._k = (1 - tension) / 6;
+}
+
+CardinalClosed.prototype = {
+  areaStart: noop,
+  areaEnd: noop,
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
+    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 1: {
+        this._context.moveTo(this._x3, this._y3);
+        this._context.closePath();
+        break;
+      }
+      case 2: {
+        this._context.lineTo(this._x3, this._y3);
+        this._context.closePath();
+        break;
+      }
+      case 3: {
+        this.point(this._x3, this._y3);
+        this.point(this._x4, this._y4);
+        this.point(this._x5, this._y5);
+        break;
+      }
+    }
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._x3 = x, this._y3 = y; break;
+      case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;
+      case 2: this._point = 3; this._x5 = x, this._y5 = y; break;
+      default: point$1(this, x, y); break;
+    }
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
+
+var cardinalClosed = ((function custom(tension) {
+
+  function cardinal(context) {
+    return new CardinalClosed(context, tension);
+  }
+
+  cardinal.tension = function(tension) {
+    return custom(+tension);
+  };
+
+  return cardinal;
+}))(0);
+
+function CardinalOpen(context, tension) {
+  this._context = context;
+  this._k = (1 - tension) / 6;
+}
+
+CardinalOpen.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 =
+    this._y0 = this._y1 = this._y2 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;
+      case 3: this._point = 4; // proceed
+      default: point$1(this, x, y); break;
+    }
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
+
+var cardinalOpen = ((function custom(tension) {
+
+  function cardinal(context) {
+    return new CardinalOpen(context, tension);
+  }
+
+  cardinal.tension = function(tension) {
+    return custom(+tension);
+  };
+
+  return cardinal;
+}))(0);
+
+function point$2(that, x, y) {
+  var x1 = that._x1,
+      y1 = that._y1,
+      x2 = that._x2,
+      y2 = that._y2;
+
+  if (that._l01_a > epsilon) {
+    var a = 2 * that._l01_2a + 3 * that._l01_a * that._l12_a + that._l12_2a,
+        n = 3 * that._l01_a * (that._l01_a + that._l12_a);
+    x1 = (x1 * a - that._x0 * that._l12_2a + that._x2 * that._l01_2a) / n;
+    y1 = (y1 * a - that._y0 * that._l12_2a + that._y2 * that._l01_2a) / n;
+  }
+
+  if (that._l23_a > epsilon) {
+    var b = 2 * that._l23_2a + 3 * that._l23_a * that._l12_a + that._l12_2a,
+        m = 3 * that._l23_a * (that._l23_a + that._l12_a);
+    x2 = (x2 * b + that._x1 * that._l23_2a - x * that._l12_2a) / m;
+    y2 = (y2 * b + that._y1 * that._l23_2a - y * that._l12_2a) / m;
+  }
+
+  that._context.bezierCurveTo(x1, y1, x2, y2, that._x2, that._y2);
+}
+
+function CatmullRom(context, alpha) {
+  this._context = context;
+  this._alpha = alpha;
+}
+
+CatmullRom.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 =
+    this._y0 = this._y1 = this._y2 = NaN;
+    this._l01_a = this._l12_a = this._l23_a =
+    this._l01_2a = this._l12_2a = this._l23_2a =
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 2: this._context.lineTo(this._x2, this._y2); break;
+      case 3: this.point(this._x2, this._y2); break;
+    }
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+
+    if (this._point) {
+      var x23 = this._x2 - x,
+          y23 = this._y2 - y;
+      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
+    }
+
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; // proceed
+      default: point$2(this, x, y); break;
+    }
+
+    this._l01_a = this._l12_a, this._l12_a = this._l23_a;
+    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
+
+var catmullRom = ((function custom(alpha) {
+
+  function catmullRom(context) {
+    return alpha ? new CatmullRom(context, alpha) : new Cardinal(context, 0);
+  }
+
+  catmullRom.alpha = function(alpha) {
+    return custom(+alpha);
+  };
+
+  return catmullRom;
+}))(0.5);
+
+function CatmullRomClosed(context, alpha) {
+  this._context = context;
+  this._alpha = alpha;
+}
+
+CatmullRomClosed.prototype = {
+  areaStart: noop,
+  areaEnd: noop,
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
+    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
+    this._l01_a = this._l12_a = this._l23_a =
+    this._l01_2a = this._l12_2a = this._l23_2a =
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 1: {
+        this._context.moveTo(this._x3, this._y3);
+        this._context.closePath();
+        break;
+      }
+      case 2: {
+        this._context.lineTo(this._x3, this._y3);
+        this._context.closePath();
+        break;
+      }
+      case 3: {
+        this.point(this._x3, this._y3);
+        this.point(this._x4, this._y4);
+        this.point(this._x5, this._y5);
+        break;
+      }
+    }
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+
+    if (this._point) {
+      var x23 = this._x2 - x,
+          y23 = this._y2 - y;
+      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
+    }
+
+    switch (this._point) {
+      case 0: this._point = 1; this._x3 = x, this._y3 = y; break;
+      case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;
+      case 2: this._point = 3; this._x5 = x, this._y5 = y; break;
+      default: point$2(this, x, y); break;
+    }
+
+    this._l01_a = this._l12_a, this._l12_a = this._l23_a;
+    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
+
+var catmullRomClosed = ((function custom(alpha) {
+
+  function catmullRom(context) {
+    return alpha ? new CatmullRomClosed(context, alpha) : new CardinalClosed(context, 0);
+  }
+
+  catmullRom.alpha = function(alpha) {
+    return custom(+alpha);
+  };
+
+  return catmullRom;
+}))(0.5);
+
+function CatmullRomOpen(context, alpha) {
+  this._context = context;
+  this._alpha = alpha;
+}
+
+CatmullRomOpen.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 =
+    this._y0 = this._y1 = this._y2 = NaN;
+    this._l01_a = this._l12_a = this._l23_a =
+    this._l01_2a = this._l12_2a = this._l23_2a =
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+
+    if (this._point) {
+      var x23 = this._x2 - x,
+          y23 = this._y2 - y;
+      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
+    }
+
+    switch (this._point) {
+      case 0: this._point = 1; break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;
+      case 3: this._point = 4; // proceed
+      default: point$2(this, x, y); break;
+    }
+
+    this._l01_a = this._l12_a, this._l12_a = this._l23_a;
+    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
+
+var catmullRomOpen = ((function custom(alpha) {
+
+  function catmullRom(context) {
+    return alpha ? new CatmullRomOpen(context, alpha) : new CardinalOpen(context, 0);
+  }
+
+  catmullRom.alpha = function(alpha) {
+    return custom(+alpha);
+  };
+
+  return catmullRom;
+}))(0.5);
+
+function LinearClosed(context) {
+  this._context = context;
+}
+
+LinearClosed.prototype = {
+  areaStart: noop,
+  areaEnd: noop,
+  lineStart: function() {
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._point) this._context.closePath();
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    if (this._point) this._context.lineTo(x, y);
+    else this._point = 1, this._context.moveTo(x, y);
+  }
+};
+
+var linearClosed = function(context) {
+  return new LinearClosed(context);
+};
+
+function sign(x) {
+  return x < 0 ? -1 : 1;
+}
+
+// Calculate the slopes of the tangents (Hermite-type interpolation) based on
+// the following paper: Steffen, M. 1990. A Simple Method for Monotonic
+// Interpolation in One Dimension. Astronomy and Astrophysics, Vol. 239, NO.
+// NOV(II), P. 443, 1990.
+function slope3(that, x2, y2) {
+  var h0 = that._x1 - that._x0,
+      h1 = x2 - that._x1,
+      s0 = (that._y1 - that._y0) / (h0 || h1 < 0 && -0),
+      s1 = (y2 - that._y1) / (h1 || h0 < 0 && -0),
+      p = (s0 * h1 + s1 * h0) / (h0 + h1);
+  return (sign(s0) + sign(s1)) * Math.min(Math.abs(s0), Math.abs(s1), 0.5 * Math.abs(p)) || 0;
+}
+
+// Calculate a one-sided slope.
+function slope2(that, t) {
+  var h = that._x1 - that._x0;
+  return h ? (3 * (that._y1 - that._y0) / h - t) / 2 : t;
+}
+
+// According to https://en.wikipedia.org/wiki/Cubic_Hermite_spline#Representations
+// "you can express cubic Hermite interpolation in terms of cubic Bézier curves
+// with respect to the four values p0, p0 + m0 / 3, p1 - m1 / 3, p1".
+function point$3(that, t0, t1) {
+  var x0 = that._x0,
+      y0 = that._y0,
+      x1 = that._x1,
+      y1 = that._y1,
+      dx = (x1 - x0) / 3;
+  that._context.bezierCurveTo(x0 + dx, y0 + dx * t0, x1 - dx, y1 - dx * t1, x1, y1);
+}
+
+function MonotoneX(context) {
+  this._context = context;
+}
+
+MonotoneX.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 =
+    this._y0 = this._y1 =
+    this._t0 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 2: this._context.lineTo(this._x1, this._y1); break;
+      case 3: point$3(this, this._t0, slope2(this, this._t0)); break;
+    }
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    var t1 = NaN;
+
+    x = +x, y = +y;
+    if (x === this._x1 && y === this._y1) return; // Ignore coincident points.
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; point$3(this, slope2(this, t1 = slope3(this, x, y)), t1); break;
+      default: point$3(this, this._t0, t1 = slope3(this, x, y)); break;
+    }
+
+    this._x0 = this._x1, this._x1 = x;
+    this._y0 = this._y1, this._y1 = y;
+    this._t0 = t1;
+  }
+};
+
+function MonotoneY(context) {
+  this._context = new ReflectContext(context);
+}
+
+(MonotoneY.prototype = Object.create(MonotoneX.prototype)).point = function(x, y) {
+  MonotoneX.prototype.point.call(this, y, x);
+};
+
+function ReflectContext(context) {
+  this._context = context;
+}
+
+ReflectContext.prototype = {
+  moveTo: function(x, y) { this._context.moveTo(y, x); },
+  closePath: function() { this._context.closePath(); },
+  lineTo: function(x, y) { this._context.lineTo(y, x); },
+  bezierCurveTo: function(x1, y1, x2, y2, x, y) { this._context.bezierCurveTo(y1, x1, y2, x2, y, x); }
+};
+
+function monotoneX(context) {
+  return new MonotoneX(context);
+}
+
+function monotoneY(context) {
+  return new MonotoneY(context);
+}
+
+function Natural(context) {
+  this._context = context;
+}
+
+Natural.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x = [];
+    this._y = [];
+  },
+  lineEnd: function() {
+    var x = this._x,
+        y = this._y,
+        n = x.length;
+
+    if (n) {
+      this._line ? this._context.lineTo(x[0], y[0]) : this._context.moveTo(x[0], y[0]);
+      if (n === 2) {
+        this._context.lineTo(x[1], y[1]);
+      } else {
+        var px = controlPoints(x),
+            py = controlPoints(y);
+        for (var i0 = 0, i1 = 1; i1 < n; ++i0, ++i1) {
+          this._context.bezierCurveTo(px[0][i0], py[0][i0], px[1][i0], py[1][i0], x[i1], y[i1]);
+        }
+      }
+    }
+
+    if (this._line || (this._line !== 0 && n === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+    this._x = this._y = null;
+  },
+  point: function(x, y) {
+    this._x.push(+x);
+    this._y.push(+y);
+  }
+};
+
+// See https://www.particleincell.com/2012/bezier-splines/ for derivation.
+function controlPoints(x) {
+  var i,
+      n = x.length - 1,
+      m,
+      a = new Array(n),
+      b = new Array(n),
+      r = new Array(n);
+  a[0] = 0, b[0] = 2, r[0] = x[0] + 2 * x[1];
+  for (i = 1; i < n - 1; ++i) a[i] = 1, b[i] = 4, r[i] = 4 * x[i] + 2 * x[i + 1];
+  a[n - 1] = 2, b[n - 1] = 7, r[n - 1] = 8 * x[n - 1] + x[n];
+  for (i = 1; i < n; ++i) m = a[i] / b[i - 1], b[i] -= m, r[i] -= m * r[i - 1];
+  a[n - 1] = r[n - 1] / b[n - 1];
+  for (i = n - 2; i >= 0; --i) a[i] = (r[i] - a[i + 1]) / b[i];
+  b[n - 1] = (x[n] + a[n - 1]) / 2;
+  for (i = 0; i < n - 1; ++i) b[i] = 2 * x[i + 1] - a[i + 1];
+  return [a, b];
+}
+
+var natural = function(context) {
+  return new Natural(context);
+};
+
+function Step(context, t) {
+  this._context = context;
+  this._t = t;
+}
+
+Step.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x = this._y = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (0 < this._t && this._t < 1 && this._point === 2) this._context.lineTo(this._x, this._y);
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    if (this._line >= 0) this._t = 1 - this._t, this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; // proceed
+      default: {
+        if (this._t <= 0) {
+          this._context.lineTo(this._x, y);
+          this._context.lineTo(x, y);
+        } else {
+          var x1 = this._x * (1 - this._t) + x * this._t;
+          this._context.lineTo(x1, this._y);
+          this._context.lineTo(x1, y);
+        }
+        break;
+      }
+    }
+    this._x = x, this._y = y;
+  }
+};
+
+var step = function(context) {
+  return new Step(context, 0.5);
+};
+
+function stepBefore(context) {
+  return new Step(context, 0);
+}
+
+function stepAfter(context) {
+  return new Step(context, 1);
+}
+
+var none = function(series, order) {
+  if (!((n = series.length) > 1)) return;
+  for (var i = 1, j, s0, s1 = series[order[0]], n, m = s1.length; i < n; ++i) {
+    s0 = s1, s1 = series[order[i]];
+    for (j = 0; j < m; ++j) {
+      s1[j][1] += s1[j][0] = isNaN(s0[j][1]) ? s0[j][0] : s0[j][1];
+    }
+  }
+};
+
+var none$1 = function(series) {
+  var n = series.length, o = new Array(n);
+  while (--n >= 0) o[n] = n;
+  return o;
+};
+
+function stackValue(d, key) {
+  return d[key];
+}
+
+var stack = function() {
+  var keys = constant([]),
+      order = none$1,
+      offset = none,
+      value = stackValue;
+
+  function stack(data) {
+    var kz = keys.apply(this, arguments),
+        i,
+        m = data.length,
+        n = kz.length,
+        sz = new Array(n),
+        oz;
+
+    for (i = 0; i < n; ++i) {
+      for (var ki = kz[i], si = sz[i] = new Array(m), j = 0, sij; j < m; ++j) {
+        si[j] = sij = [0, +value(data[j], ki, j, data)];
+        sij.data = data[j];
+      }
+      si.key = ki;
+    }
+
+    for (i = 0, oz = order(sz); i < n; ++i) {
+      sz[oz[i]].index = i;
+    }
+
+    offset(sz, oz);
+    return sz;
+  }
+
+  stack.keys = function(_) {
+    return arguments.length ? (keys = typeof _ === "function" ? _ : constant(slice.call(_)), stack) : keys;
+  };
+
+  stack.value = function(_) {
+    return arguments.length ? (value = typeof _ === "function" ? _ : constant(+_), stack) : value;
+  };
+
+  stack.order = function(_) {
+    return arguments.length ? (order = _ == null ? none$1 : typeof _ === "function" ? _ : constant(slice.call(_)), stack) : order;
+  };
+
+  stack.offset = function(_) {
+    return arguments.length ? (offset = _ == null ? none : _, stack) : offset;
+  };
+
+  return stack;
+};
+
+var expand = function(series, order) {
+  if (!((n = series.length) > 0)) return;
+  for (var i, n, j = 0, m = series[0].length, y; j < m; ++j) {
+    for (y = i = 0; i < n; ++i) y += series[i][j][1] || 0;
+    if (y) for (i = 0; i < n; ++i) series[i][j][1] /= y;
+  }
+  none(series, order);
+};
+
+var diverging = function(series, order) {
+  if (!((n = series.length) > 1)) return;
+  for (var i, j = 0, d, dy, yp, yn, n, m = series[order[0]].length; j < m; ++j) {
+    for (yp = yn = 0, i = 0; i < n; ++i) {
+      if ((dy = (d = series[order[i]][j])[1] - d[0]) >= 0) {
+        d[0] = yp, d[1] = yp += dy;
+      } else if (dy < 0) {
+        d[1] = yn, d[0] = yn += dy;
+      } else {
+        d[0] = yp;
+      }
+    }
+  }
+};
+
+var silhouette = function(series, order) {
+  if (!((n = series.length) > 0)) return;
+  for (var j = 0, s0 = series[order[0]], n, m = s0.length; j < m; ++j) {
+    for (var i = 0, y = 0; i < n; ++i) y += series[i][j][1] || 0;
+    s0[j][1] += s0[j][0] = -y / 2;
+  }
+  none(series, order);
+};
+
+var wiggle = function(series, order) {
+  if (!((n = series.length) > 0) || !((m = (s0 = series[order[0]]).length) > 0)) return;
+  for (var y = 0, j = 1, s0, m, n; j < m; ++j) {
+    for (var i = 0, s1 = 0, s2 = 0; i < n; ++i) {
+      var si = series[order[i]],
+          sij0 = si[j][1] || 0,
+          sij1 = si[j - 1][1] || 0,
+          s3 = (sij0 - sij1) / 2;
+      for (var k = 0; k < i; ++k) {
+        var sk = series[order[k]],
+            skj0 = sk[j][1] || 0,
+            skj1 = sk[j - 1][1] || 0;
+        s3 += skj0 - skj1;
+      }
+      s1 += sij0, s2 += s3 * sij0;
+    }
+    s0[j - 1][1] += s0[j - 1][0] = y;
+    if (s1) y -= s2 / s1;
+  }
+  s0[j - 1][1] += s0[j - 1][0] = y;
+  none(series, order);
+};
+
+var ascending = function(series) {
+  var sums = series.map(sum);
+  return none$1(series).sort(function(a, b) { return sums[a] - sums[b]; });
+};
+
+function sum(series) {
+  var s = 0, i = -1, n = series.length, v;
+  while (++i < n) if (v = +series[i][1]) s += v;
+  return s;
+}
+
+var descending$1 = function(series) {
+  return ascending(series).reverse();
+};
+
+var insideOut = function(series) {
+  var n = series.length,
+      i,
+      j,
+      sums = series.map(sum),
+      order = none$1(series).sort(function(a, b) { return sums[b] - sums[a]; }),
+      top = 0,
+      bottom = 0,
+      tops = [],
+      bottoms = [];
+
+  for (i = 0; i < n; ++i) {
+    j = order[i];
+    if (top < bottom) {
+      top += sums[j];
+      tops.push(j);
+    } else {
+      bottom += sums[j];
+      bottoms.push(j);
+    }
+  }
+
+  return bottoms.reverse().concat(tops);
+};
+
+var reverse = function(series) {
+  return none$1(series).reverse();
+};
+
+exports.arc = arc;
+exports.area = area;
+exports.line = line;
+exports.pie = pie;
+exports.areaRadial = areaRadial;
+exports.radialArea = areaRadial;
+exports.lineRadial = lineRadial$1;
+exports.radialLine = lineRadial$1;
+exports.pointRadial = pointRadial;
+exports.linkHorizontal = linkHorizontal;
+exports.linkVertical = linkVertical;
+exports.linkRadial = linkRadial;
+exports.symbol = symbol;
+exports.symbols = symbols;
+exports.symbolCircle = circle;
+exports.symbolCross = cross;
+exports.symbolDiamond = diamond;
+exports.symbolSquare = square;
+exports.symbolStar = star;
+exports.symbolTriangle = triangle;
+exports.symbolWye = wye;
+exports.curveBasisClosed = basisClosed;
+exports.curveBasisOpen = basisOpen;
+exports.curveBasis = basis;
+exports.curveBundle = bundle;
+exports.curveCardinalClosed = cardinalClosed;
+exports.curveCardinalOpen = cardinalOpen;
+exports.curveCardinal = cardinal;
+exports.curveCatmullRomClosed = catmullRomClosed;
+exports.curveCatmullRomOpen = catmullRomOpen;
+exports.curveCatmullRom = catmullRom;
+exports.curveLinearClosed = linearClosed;
+exports.curveLinear = curveLinear;
+exports.curveMonotoneX = monotoneX;
+exports.curveMonotoneY = monotoneY;
+exports.curveNatural = natural;
+exports.curveStep = step;
+exports.curveStepAfter = stepAfter;
+exports.curveStepBefore = stepBefore;
+exports.stack = stack;
+exports.stackOffsetExpand = expand;
+exports.stackOffsetDiverging = diverging;
+exports.stackOffsetNone = none;
+exports.stackOffsetSilhouette = silhouette;
+exports.stackOffsetWiggle = wiggle;
+exports.stackOrderAscending = ascending;
+exports.stackOrderDescending = descending$1;
+exports.stackOrderInsideOut = insideOut;
+exports.stackOrderNone = none$1;
+exports.stackOrderReverse = reverse;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+
+},{"d3-path":10}],14:[function(require,module,exports){
+// https://d3js.org/d3-time-format/ Version 2.0.5. Copyright 2017 Mike Bostock.
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-time')) :
+	typeof define === 'function' && define.amd ? define(['exports', 'd3-time'], factory) :
+	(factory((global.d3 = global.d3 || {}),global.d3));
+}(this, (function (exports,d3Time) { 'use strict';
+
+function localDate(d) {
+  if (0 <= d.y && d.y < 100) {
+    var date = new Date(-1, d.m, d.d, d.H, d.M, d.S, d.L);
+    date.setFullYear(d.y);
+    return date;
+  }
+  return new Date(d.y, d.m, d.d, d.H, d.M, d.S, d.L);
+}
+
+function utcDate(d) {
+  if (0 <= d.y && d.y < 100) {
+    var date = new Date(Date.UTC(-1, d.m, d.d, d.H, d.M, d.S, d.L));
+    date.setUTCFullYear(d.y);
+    return date;
+  }
+  return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L));
+}
+
+function newYear(y) {
+  return {y: y, m: 0, d: 1, H: 0, M: 0, S: 0, L: 0};
+}
+
+function formatLocale(locale) {
+  var locale_dateTime = locale.dateTime,
+      locale_date = locale.date,
+      locale_time = locale.time,
+      locale_periods = locale.periods,
+      locale_weekdays = locale.days,
+      locale_shortWeekdays = locale.shortDays,
+      locale_months = locale.months,
+      locale_shortMonths = locale.shortMonths;
+
+  var periodRe = formatRe(locale_periods),
+      periodLookup = formatLookup(locale_periods),
+      weekdayRe = formatRe(locale_weekdays),
+      weekdayLookup = formatLookup(locale_weekdays),
+      shortWeekdayRe = formatRe(locale_shortWeekdays),
+      shortWeekdayLookup = formatLookup(locale_shortWeekdays),
+      monthRe = formatRe(locale_months),
+      monthLookup = formatLookup(locale_months),
+      shortMonthRe = formatRe(locale_shortMonths),
+      shortMonthLookup = formatLookup(locale_shortMonths);
+
+  var formats = {
+    "a": formatShortWeekday,
+    "A": formatWeekday,
+    "b": formatShortMonth,
+    "B": formatMonth,
+    "c": null,
+    "d": formatDayOfMonth,
+    "e": formatDayOfMonth,
+    "H": formatHour24,
+    "I": formatHour12,
+    "j": formatDayOfYear,
+    "L": formatMilliseconds,
+    "m": formatMonthNumber,
+    "M": formatMinutes,
+    "p": formatPeriod,
+    "S": formatSeconds,
+    "U": formatWeekNumberSunday,
+    "w": formatWeekdayNumber,
+    "W": formatWeekNumberMonday,
+    "x": null,
+    "X": null,
+    "y": formatYear,
+    "Y": formatFullYear,
+    "Z": formatZone,
+    "%": formatLiteralPercent
+  };
+
+  var utcFormats = {
+    "a": formatUTCShortWeekday,
+    "A": formatUTCWeekday,
+    "b": formatUTCShortMonth,
+    "B": formatUTCMonth,
+    "c": null,
+    "d": formatUTCDayOfMonth,
+    "e": formatUTCDayOfMonth,
+    "H": formatUTCHour24,
+    "I": formatUTCHour12,
+    "j": formatUTCDayOfYear,
+    "L": formatUTCMilliseconds,
+    "m": formatUTCMonthNumber,
+    "M": formatUTCMinutes,
+    "p": formatUTCPeriod,
+    "S": formatUTCSeconds,
+    "U": formatUTCWeekNumberSunday,
+    "w": formatUTCWeekdayNumber,
+    "W": formatUTCWeekNumberMonday,
+    "x": null,
+    "X": null,
+    "y": formatUTCYear,
+    "Y": formatUTCFullYear,
+    "Z": formatUTCZone,
+    "%": formatLiteralPercent
+  };
+
+  var parses = {
+    "a": parseShortWeekday,
+    "A": parseWeekday,
+    "b": parseShortMonth,
+    "B": parseMonth,
+    "c": parseLocaleDateTime,
+    "d": parseDayOfMonth,
+    "e": parseDayOfMonth,
+    "H": parseHour24,
+    "I": parseHour24,
+    "j": parseDayOfYear,
+    "L": parseMilliseconds,
+    "m": parseMonthNumber,
+    "M": parseMinutes,
+    "p": parsePeriod,
+    "S": parseSeconds,
+    "U": parseWeekNumberSunday,
+    "w": parseWeekdayNumber,
+    "W": parseWeekNumberMonday,
+    "x": parseLocaleDate,
+    "X": parseLocaleTime,
+    "y": parseYear,
+    "Y": parseFullYear,
+    "Z": parseZone,
+    "%": parseLiteralPercent
+  };
+
+  // These recursive directive definitions must be deferred.
+  formats.x = newFormat(locale_date, formats);
+  formats.X = newFormat(locale_time, formats);
+  formats.c = newFormat(locale_dateTime, formats);
+  utcFormats.x = newFormat(locale_date, utcFormats);
+  utcFormats.X = newFormat(locale_time, utcFormats);
+  utcFormats.c = newFormat(locale_dateTime, utcFormats);
+
+  function newFormat(specifier, formats) {
+    return function(date) {
+      var string = [],
+          i = -1,
+          j = 0,
+          n = specifier.length,
+          c,
+          pad,
+          format;
+
+      if (!(date instanceof Date)) date = new Date(+date);
+
+      while (++i < n) {
+        if (specifier.charCodeAt(i) === 37) {
+          string.push(specifier.slice(j, i));
+          if ((pad = pads[c = specifier.charAt(++i)]) != null) c = specifier.charAt(++i);
+          else pad = c === "e" ? " " : "0";
+          if (format = formats[c]) c = format(date, pad);
+          string.push(c);
+          j = i + 1;
+        }
+      }
+
+      string.push(specifier.slice(j, i));
+      return string.join("");
+    };
+  }
+
+  function newParse(specifier, newDate) {
+    return function(string) {
+      var d = newYear(1900),
+          i = parseSpecifier(d, specifier, string += "", 0);
+      if (i != string.length) return null;
+
+      // The am-pm flag is 0 for AM, and 1 for PM.
+      if ("p" in d) d.H = d.H % 12 + d.p * 12;
+
+      // Convert day-of-week and week-of-year to day-of-year.
+      if ("W" in d || "U" in d) {
+        if (!("w" in d)) d.w = "W" in d ? 1 : 0;
+        var day = "Z" in d ? utcDate(newYear(d.y)).getUTCDay() : newDate(newYear(d.y)).getDay();
+        d.m = 0;
+        d.d = "W" in d ? (d.w + 6) % 7 + d.W * 7 - (day + 5) % 7 : d.w + d.U * 7 - (day + 6) % 7;
+      }
+
+      // If a time zone is specified, all fields are interpreted as UTC and then
+      // offset according to the specified time zone.
+      if ("Z" in d) {
+        d.H += d.Z / 100 | 0;
+        d.M += d.Z % 100;
+        return utcDate(d);
+      }
+
+      // Otherwise, all fields are in local time.
+      return newDate(d);
+    };
+  }
+
+  function parseSpecifier(d, specifier, string, j) {
+    var i = 0,
+        n = specifier.length,
+        m = string.length,
+        c,
+        parse;
+
+    while (i < n) {
+      if (j >= m) return -1;
+      c = specifier.charCodeAt(i++);
+      if (c === 37) {
+        c = specifier.charAt(i++);
+        parse = parses[c in pads ? specifier.charAt(i++) : c];
+        if (!parse || ((j = parse(d, string, j)) < 0)) return -1;
+      } else if (c != string.charCodeAt(j++)) {
+        return -1;
+      }
+    }
+
+    return j;
+  }
+
+  function parsePeriod(d, string, i) {
+    var n = periodRe.exec(string.slice(i));
+    return n ? (d.p = periodLookup[n[0].toLowerCase()], i + n[0].length) : -1;
+  }
+
+  function parseShortWeekday(d, string, i) {
+    var n = shortWeekdayRe.exec(string.slice(i));
+    return n ? (d.w = shortWeekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;
+  }
+
+  function parseWeekday(d, string, i) {
+    var n = weekdayRe.exec(string.slice(i));
+    return n ? (d.w = weekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;
+  }
+
+  function parseShortMonth(d, string, i) {
+    var n = shortMonthRe.exec(string.slice(i));
+    return n ? (d.m = shortMonthLookup[n[0].toLowerCase()], i + n[0].length) : -1;
+  }
+
+  function parseMonth(d, string, i) {
+    var n = monthRe.exec(string.slice(i));
+    return n ? (d.m = monthLookup[n[0].toLowerCase()], i + n[0].length) : -1;
+  }
+
+  function parseLocaleDateTime(d, string, i) {
+    return parseSpecifier(d, locale_dateTime, string, i);
+  }
+
+  function parseLocaleDate(d, string, i) {
+    return parseSpecifier(d, locale_date, string, i);
+  }
+
+  function parseLocaleTime(d, string, i) {
+    return parseSpecifier(d, locale_time, string, i);
+  }
+
+  function formatShortWeekday(d) {
+    return locale_shortWeekdays[d.getDay()];
+  }
+
+  function formatWeekday(d) {
+    return locale_weekdays[d.getDay()];
+  }
+
+  function formatShortMonth(d) {
+    return locale_shortMonths[d.getMonth()];
+  }
+
+  function formatMonth(d) {
+    return locale_months[d.getMonth()];
+  }
+
+  function formatPeriod(d) {
+    return locale_periods[+(d.getHours() >= 12)];
+  }
+
+  function formatUTCShortWeekday(d) {
+    return locale_shortWeekdays[d.getUTCDay()];
+  }
+
+  function formatUTCWeekday(d) {
+    return locale_weekdays[d.getUTCDay()];
+  }
+
+  function formatUTCShortMonth(d) {
+    return locale_shortMonths[d.getUTCMonth()];
+  }
+
+  function formatUTCMonth(d) {
+    return locale_months[d.getUTCMonth()];
+  }
+
+  function formatUTCPeriod(d) {
+    return locale_periods[+(d.getUTCHours() >= 12)];
+  }
+
+  return {
+    format: function(specifier) {
+      var f = newFormat(specifier += "", formats);
+      f.toString = function() { return specifier; };
+      return f;
+    },
+    parse: function(specifier) {
+      var p = newParse(specifier += "", localDate);
+      p.toString = function() { return specifier; };
+      return p;
+    },
+    utcFormat: function(specifier) {
+      var f = newFormat(specifier += "", utcFormats);
+      f.toString = function() { return specifier; };
+      return f;
+    },
+    utcParse: function(specifier) {
+      var p = newParse(specifier, utcDate);
+      p.toString = function() { return specifier; };
+      return p;
+    }
+  };
+}
+
+var pads = {"-": "", "_": " ", "0": "0"};
+var numberRe = /^\s*\d+/;
+var percentRe = /^%/;
+var requoteRe = /[\\\^\$\*\+\?\|\[\]\(\)\.\{\}]/g;
+
+function pad(value, fill, width) {
+  var sign = value < 0 ? "-" : "",
+      string = (sign ? -value : value) + "",
+      length = string.length;
+  return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string);
+}
+
+function requote(s) {
+  return s.replace(requoteRe, "\\$&");
+}
+
+function formatRe(names) {
+  return new RegExp("^(?:" + names.map(requote).join("|") + ")", "i");
+}
+
+function formatLookup(names) {
+  var map = {}, i = -1, n = names.length;
+  while (++i < n) map[names[i].toLowerCase()] = i;
+  return map;
+}
+
+function parseWeekdayNumber(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 1));
+  return n ? (d.w = +n[0], i + n[0].length) : -1;
+}
+
+function parseWeekNumberSunday(d, string, i) {
+  var n = numberRe.exec(string.slice(i));
+  return n ? (d.U = +n[0], i + n[0].length) : -1;
+}
+
+function parseWeekNumberMonday(d, string, i) {
+  var n = numberRe.exec(string.slice(i));
+  return n ? (d.W = +n[0], i + n[0].length) : -1;
+}
+
+function parseFullYear(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 4));
+  return n ? (d.y = +n[0], i + n[0].length) : -1;
+}
+
+function parseYear(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 2));
+  return n ? (d.y = +n[0] + (+n[0] > 68 ? 1900 : 2000), i + n[0].length) : -1;
+}
+
+function parseZone(d, string, i) {
+  var n = /^(Z)|([+-]\d\d)(?:\:?(\d\d))?/.exec(string.slice(i, i + 6));
+  return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || "00")), i + n[0].length) : -1;
+}
+
+function parseMonthNumber(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 2));
+  return n ? (d.m = n[0] - 1, i + n[0].length) : -1;
+}
+
+function parseDayOfMonth(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 2));
+  return n ? (d.d = +n[0], i + n[0].length) : -1;
+}
+
+function parseDayOfYear(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 3));
+  return n ? (d.m = 0, d.d = +n[0], i + n[0].length) : -1;
+}
+
+function parseHour24(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 2));
+  return n ? (d.H = +n[0], i + n[0].length) : -1;
+}
+
+function parseMinutes(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 2));
+  return n ? (d.M = +n[0], i + n[0].length) : -1;
+}
+
+function parseSeconds(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 2));
+  return n ? (d.S = +n[0], i + n[0].length) : -1;
+}
+
+function parseMilliseconds(d, string, i) {
+  var n = numberRe.exec(string.slice(i, i + 3));
+  return n ? (d.L = +n[0], i + n[0].length) : -1;
+}
+
+function parseLiteralPercent(d, string, i) {
+  var n = percentRe.exec(string.slice(i, i + 1));
+  return n ? i + n[0].length : -1;
+}
+
+function formatDayOfMonth(d, p) {
+  return pad(d.getDate(), p, 2);
+}
+
+function formatHour24(d, p) {
+  return pad(d.getHours(), p, 2);
+}
+
+function formatHour12(d, p) {
+  return pad(d.getHours() % 12 || 12, p, 2);
+}
+
+function formatDayOfYear(d, p) {
+  return pad(1 + d3Time.timeDay.count(d3Time.timeYear(d), d), p, 3);
+}
+
+function formatMilliseconds(d, p) {
+  return pad(d.getMilliseconds(), p, 3);
+}
+
+function formatMonthNumber(d, p) {
+  return pad(d.getMonth() + 1, p, 2);
+}
+
+function formatMinutes(d, p) {
+  return pad(d.getMinutes(), p, 2);
+}
+
+function formatSeconds(d, p) {
+  return pad(d.getSeconds(), p, 2);
+}
+
+function formatWeekNumberSunday(d, p) {
+  return pad(d3Time.timeSunday.count(d3Time.timeYear(d), d), p, 2);
+}
+
+function formatWeekdayNumber(d) {
+  return d.getDay();
+}
+
+function formatWeekNumberMonday(d, p) {
+  return pad(d3Time.timeMonday.count(d3Time.timeYear(d), d), p, 2);
+}
+
+function formatYear(d, p) {
+  return pad(d.getFullYear() % 100, p, 2);
+}
+
+function formatFullYear(d, p) {
+  return pad(d.getFullYear() % 10000, p, 4);
+}
+
+function formatZone(d) {
+  var z = d.getTimezoneOffset();
+  return (z > 0 ? "-" : (z *= -1, "+"))
+      + pad(z / 60 | 0, "0", 2)
+      + pad(z % 60, "0", 2);
+}
+
+function formatUTCDayOfMonth(d, p) {
+  return pad(d.getUTCDate(), p, 2);
+}
+
+function formatUTCHour24(d, p) {
+  return pad(d.getUTCHours(), p, 2);
+}
+
+function formatUTCHour12(d, p) {
+  return pad(d.getUTCHours() % 12 || 12, p, 2);
+}
+
+function formatUTCDayOfYear(d, p) {
+  return pad(1 + d3Time.utcDay.count(d3Time.utcYear(d), d), p, 3);
+}
+
+function formatUTCMilliseconds(d, p) {
+  return pad(d.getUTCMilliseconds(), p, 3);
+}
+
+function formatUTCMonthNumber(d, p) {
+  return pad(d.getUTCMonth() + 1, p, 2);
+}
+
+function formatUTCMinutes(d, p) {
+  return pad(d.getUTCMinutes(), p, 2);
+}
+
+function formatUTCSeconds(d, p) {
+  return pad(d.getUTCSeconds(), p, 2);
+}
+
+function formatUTCWeekNumberSunday(d, p) {
+  return pad(d3Time.utcSunday.count(d3Time.utcYear(d), d), p, 2);
+}
+
+function formatUTCWeekdayNumber(d) {
+  return d.getUTCDay();
+}
+
+function formatUTCWeekNumberMonday(d, p) {
+  return pad(d3Time.utcMonday.count(d3Time.utcYear(d), d), p, 2);
+}
+
+function formatUTCYear(d, p) {
+  return pad(d.getUTCFullYear() % 100, p, 2);
+}
+
+function formatUTCFullYear(d, p) {
+  return pad(d.getUTCFullYear() % 10000, p, 4);
+}
+
+function formatUTCZone() {
+  return "+0000";
+}
+
+function formatLiteralPercent() {
+  return "%";
+}
+
+var locale$1;
+
+
+
+
+
+defaultLocale({
+  dateTime: "%x, %X",
+  date: "%-m/%-d/%Y",
+  time: "%-I:%M:%S %p",
+  periods: ["AM", "PM"],
+  days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
+  shortDays: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
+  months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
+  shortMonths: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
+});
+
+function defaultLocale(definition) {
+  locale$1 = formatLocale(definition);
+  exports.timeFormat = locale$1.format;
+  exports.timeParse = locale$1.parse;
+  exports.utcFormat = locale$1.utcFormat;
+  exports.utcParse = locale$1.utcParse;
+  return locale$1;
+}
+
+var isoSpecifier = "%Y-%m-%dT%H:%M:%S.%LZ";
+
+function formatIsoNative(date) {
+  return date.toISOString();
+}
+
+var formatIso = Date.prototype.toISOString
+    ? formatIsoNative
+    : exports.utcFormat(isoSpecifier);
+
+function parseIsoNative(string) {
+  var date = new Date(string);
+  return isNaN(date) ? null : date;
+}
+
+var parseIso = +new Date("2000-01-01T00:00:00.000Z")
+    ? parseIsoNative
+    : exports.utcParse(isoSpecifier);
+
+exports.timeFormatDefaultLocale = defaultLocale;
+exports.timeFormatLocale = formatLocale;
+exports.isoFormat = formatIso;
+exports.isoParse = parseIso;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+
+},{"d3-time":15}],15:[function(require,module,exports){
+// https://d3js.org/d3-time/ Version 1.0.6. Copyright 2017 Mike Bostock.
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+	typeof define === 'function' && define.amd ? define(['exports'], factory) :
+	(factory((global.d3 = global.d3 || {})));
+}(this, (function (exports) { 'use strict';
+
+var t0 = new Date;
+var t1 = new Date;
+
+function newInterval(floori, offseti, count, field) {
+
+  function interval(date) {
+    return floori(date = new Date(+date)), date;
+  }
+
+  interval.floor = interval;
+
+  interval.ceil = function(date) {
+    return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;
+  };
+
+  interval.round = function(date) {
+    var d0 = interval(date),
+        d1 = interval.ceil(date);
+    return date - d0 < d1 - date ? d0 : d1;
+  };
+
+  interval.offset = function(date, step) {
+    return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date;
+  };
+
+  interval.range = function(start, stop, step) {
+    var range = [];
+    start = interval.ceil(start);
+    step = step == null ? 1 : Math.floor(step);
+    if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date
+    do range.push(new Date(+start)); while (offseti(start, step), floori(start), start < stop)
+    return range;
+  };
+
+  interval.filter = function(test) {
+    return newInterval(function(date) {
+      if (date >= date) while (floori(date), !test(date)) date.setTime(date - 1);
+    }, function(date, step) {
+      if (date >= date) while (--step >= 0) while (offseti(date, 1), !test(date)) {} // eslint-disable-line no-empty
+    });
+  };
+
+  if (count) {
+    interval.count = function(start, end) {
+      t0.setTime(+start), t1.setTime(+end);
+      floori(t0), floori(t1);
+      return Math.floor(count(t0, t1));
+    };
+
+    interval.every = function(step) {
+      step = Math.floor(step);
+      return !isFinite(step) || !(step > 0) ? null
+          : !(step > 1) ? interval
+          : interval.filter(field
+              ? function(d) { return field(d) % step === 0; }
+              : function(d) { return interval.count(0, d) % step === 0; });
+    };
+  }
+
+  return interval;
+}
+
+var millisecond = newInterval(function() {
+  // noop
+}, function(date, step) {
+  date.setTime(+date + step);
+}, function(start, end) {
+  return end - start;
+});
+
+// An optimized implementation for this simple case.
+millisecond.every = function(k) {
+  k = Math.floor(k);
+  if (!isFinite(k) || !(k > 0)) return null;
+  if (!(k > 1)) return millisecond;
+  return newInterval(function(date) {
+    date.setTime(Math.floor(date / k) * k);
+  }, function(date, step) {
+    date.setTime(+date + step * k);
+  }, function(start, end) {
+    return (end - start) / k;
+  });
+};
+
+var milliseconds = millisecond.range;
+
+var durationSecond = 1e3;
+var durationMinute = 6e4;
+var durationHour = 36e5;
+var durationDay = 864e5;
+var durationWeek = 6048e5;
+
+var second = newInterval(function(date) {
+  date.setTime(Math.floor(date / durationSecond) * durationSecond);
+}, function(date, step) {
+  date.setTime(+date + step * durationSecond);
+}, function(start, end) {
+  return (end - start) / durationSecond;
+}, function(date) {
+  return date.getUTCSeconds();
+});
+
+var seconds = second.range;
+
+var minute = newInterval(function(date) {
+  date.setTime(Math.floor(date / durationMinute) * durationMinute);
+}, function(date, step) {
+  date.setTime(+date + step * durationMinute);
+}, function(start, end) {
+  return (end - start) / durationMinute;
+}, function(date) {
+  return date.getMinutes();
+});
+
+var minutes = minute.range;
+
+var hour = newInterval(function(date) {
+  var offset = date.getTimezoneOffset() * durationMinute % durationHour;
+  if (offset < 0) offset += durationHour;
+  date.setTime(Math.floor((+date - offset) / durationHour) * durationHour + offset);
+}, function(date, step) {
+  date.setTime(+date + step * durationHour);
+}, function(start, end) {
+  return (end - start) / durationHour;
+}, function(date) {
+  return date.getHours();
+});
+
+var hours = hour.range;
+
+var day = newInterval(function(date) {
+  date.setHours(0, 0, 0, 0);
+}, function(date, step) {
+  date.setDate(date.getDate() + step);
+}, function(start, end) {
+  return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationDay;
+}, function(date) {
+  return date.getDate() - 1;
+});
+
+var days = day.range;
+
+function weekday(i) {
+  return newInterval(function(date) {
+    date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7);
+    date.setHours(0, 0, 0, 0);
+  }, function(date, step) {
+    date.setDate(date.getDate() + step * 7);
+  }, function(start, end) {
+    return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationWeek;
+  });
+}
+
+var sunday = weekday(0);
+var monday = weekday(1);
+var tuesday = weekday(2);
+var wednesday = weekday(3);
+var thursday = weekday(4);
+var friday = weekday(5);
+var saturday = weekday(6);
+
+var sundays = sunday.range;
+var mondays = monday.range;
+var tuesdays = tuesday.range;
+var wednesdays = wednesday.range;
+var thursdays = thursday.range;
+var fridays = friday.range;
+var saturdays = saturday.range;
+
+var month = newInterval(function(date) {
+  date.setDate(1);
+  date.setHours(0, 0, 0, 0);
+}, function(date, step) {
+  date.setMonth(date.getMonth() + step);
+}, function(start, end) {
+  return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12;
+}, function(date) {
+  return date.getMonth();
+});
+
+var months = month.range;
+
+var year = newInterval(function(date) {
+  date.setMonth(0, 1);
+  date.setHours(0, 0, 0, 0);
+}, function(date, step) {
+  date.setFullYear(date.getFullYear() + step);
+}, function(start, end) {
+  return end.getFullYear() - start.getFullYear();
+}, function(date) {
+  return date.getFullYear();
+});
+
+// An optimized implementation for this simple case.
+year.every = function(k) {
+  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {
+    date.setFullYear(Math.floor(date.getFullYear() / k) * k);
+    date.setMonth(0, 1);
+    date.setHours(0, 0, 0, 0);
+  }, function(date, step) {
+    date.setFullYear(date.getFullYear() + step * k);
+  });
+};
+
+var years = year.range;
+
+var utcMinute = newInterval(function(date) {
+  date.setUTCSeconds(0, 0);
+}, function(date, step) {
+  date.setTime(+date + step * durationMinute);
+}, function(start, end) {
+  return (end - start) / durationMinute;
+}, function(date) {
+  return date.getUTCMinutes();
+});
+
+var utcMinutes = utcMinute.range;
+
+var utcHour = newInterval(function(date) {
+  date.setUTCMinutes(0, 0, 0);
+}, function(date, step) {
+  date.setTime(+date + step * durationHour);
+}, function(start, end) {
+  return (end - start) / durationHour;
+}, function(date) {
+  return date.getUTCHours();
+});
+
+var utcHours = utcHour.range;
+
+var utcDay = newInterval(function(date) {
+  date.setUTCHours(0, 0, 0, 0);
+}, function(date, step) {
+  date.setUTCDate(date.getUTCDate() + step);
+}, function(start, end) {
+  return (end - start) / durationDay;
+}, function(date) {
+  return date.getUTCDate() - 1;
+});
+
+var utcDays = utcDay.range;
+
+function utcWeekday(i) {
+  return newInterval(function(date) {
+    date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7);
+    date.setUTCHours(0, 0, 0, 0);
+  }, function(date, step) {
+    date.setUTCDate(date.getUTCDate() + step * 7);
+  }, function(start, end) {
+    return (end - start) / durationWeek;
+  });
+}
+
+var utcSunday = utcWeekday(0);
+var utcMonday = utcWeekday(1);
+var utcTuesday = utcWeekday(2);
+var utcWednesday = utcWeekday(3);
+var utcThursday = utcWeekday(4);
+var utcFriday = utcWeekday(5);
+var utcSaturday = utcWeekday(6);
+
+var utcSundays = utcSunday.range;
+var utcMondays = utcMonday.range;
+var utcTuesdays = utcTuesday.range;
+var utcWednesdays = utcWednesday.range;
+var utcThursdays = utcThursday.range;
+var utcFridays = utcFriday.range;
+var utcSaturdays = utcSaturday.range;
+
+var utcMonth = newInterval(function(date) {
+  date.setUTCDate(1);
+  date.setUTCHours(0, 0, 0, 0);
+}, function(date, step) {
+  date.setUTCMonth(date.getUTCMonth() + step);
+}, function(start, end) {
+  return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;
+}, function(date) {
+  return date.getUTCMonth();
+});
+
+var utcMonths = utcMonth.range;
+
+var utcYear = newInterval(function(date) {
+  date.setUTCMonth(0, 1);
+  date.setUTCHours(0, 0, 0, 0);
+}, function(date, step) {
+  date.setUTCFullYear(date.getUTCFullYear() + step);
+}, function(start, end) {
+  return end.getUTCFullYear() - start.getUTCFullYear();
+}, function(date) {
+  return date.getUTCFullYear();
+});
+
+// An optimized implementation for this simple case.
+utcYear.every = function(k) {
+  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {
+    date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k);
+    date.setUTCMonth(0, 1);
+    date.setUTCHours(0, 0, 0, 0);
+  }, function(date, step) {
+    date.setUTCFullYear(date.getUTCFullYear() + step * k);
+  });
+};
+
+var utcYears = utcYear.range;
+
+exports.timeInterval = newInterval;
+exports.timeMillisecond = millisecond;
+exports.timeMilliseconds = milliseconds;
+exports.utcMillisecond = millisecond;
+exports.utcMilliseconds = milliseconds;
+exports.timeSecond = second;
+exports.timeSeconds = seconds;
+exports.utcSecond = second;
+exports.utcSeconds = seconds;
+exports.timeMinute = minute;
+exports.timeMinutes = minutes;
+exports.timeHour = hour;
+exports.timeHours = hours;
+exports.timeDay = day;
+exports.timeDays = days;
+exports.timeWeek = sunday;
+exports.timeWeeks = sundays;
+exports.timeSunday = sunday;
+exports.timeSundays = sundays;
+exports.timeMonday = monday;
+exports.timeMondays = mondays;
+exports.timeTuesday = tuesday;
+exports.timeTuesdays = tuesdays;
+exports.timeWednesday = wednesday;
+exports.timeWednesdays = wednesdays;
+exports.timeThursday = thursday;
+exports.timeThursdays = thursdays;
+exports.timeFriday = friday;
+exports.timeFridays = fridays;
+exports.timeSaturday = saturday;
+exports.timeSaturdays = saturdays;
+exports.timeMonth = month;
+exports.timeMonths = months;
+exports.timeYear = year;
+exports.timeYears = years;
+exports.utcMinute = utcMinute;
+exports.utcMinutes = utcMinutes;
+exports.utcHour = utcHour;
+exports.utcHours = utcHours;
+exports.utcDay = utcDay;
+exports.utcDays = utcDays;
+exports.utcWeek = utcSunday;
+exports.utcWeeks = utcSundays;
+exports.utcSunday = utcSunday;
+exports.utcSundays = utcSundays;
+exports.utcMonday = utcMonday;
+exports.utcMondays = utcMondays;
+exports.utcTuesday = utcTuesday;
+exports.utcTuesdays = utcTuesdays;
+exports.utcWednesday = utcWednesday;
+exports.utcWednesdays = utcWednesdays;
+exports.utcThursday = utcThursday;
+exports.utcThursdays = utcThursdays;
+exports.utcFriday = utcFriday;
+exports.utcFridays = utcFridays;
+exports.utcSaturday = utcSaturday;
+exports.utcSaturdays = utcSaturdays;
+exports.utcMonth = utcMonth;
+exports.utcMonths = utcMonths;
+exports.utcYear = utcYear;
+exports.utcYears = utcYears;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+
+},{}],16:[function(require,module,exports){
+// https://d3js.org/d3-timer/ Version 1.0.6. Copyright 2017 Mike Bostock.
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+	typeof define === 'function' && define.amd ? define(['exports'], factory) :
+	(factory((global.d3 = global.d3 || {})));
+}(this, (function (exports) { 'use strict';
+
+var frame = 0;
+var timeout = 0;
+var interval = 0;
+var pokeDelay = 1000;
+var taskHead;
+var taskTail;
+var clockLast = 0;
+var clockNow = 0;
+var clockSkew = 0;
+var clock = typeof performance === "object" && performance.now ? performance : Date;
+var setFrame = typeof window === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function(f) { setTimeout(f, 17); };
+
+function now() {
+  return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
+}
+
+function clearNow() {
+  clockNow = 0;
+}
+
+function Timer() {
+  this._call =
+  this._time =
+  this._next = null;
+}
+
+Timer.prototype = timer.prototype = {
+  constructor: Timer,
+  restart: function(callback, delay, time) {
+    if (typeof callback !== "function") throw new TypeError("callback is not a function");
+    time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
+    if (!this._next && taskTail !== this) {
+      if (taskTail) taskTail._next = this;
+      else taskHead = this;
+      taskTail = this;
+    }
+    this._call = callback;
+    this._time = time;
+    sleep();
+  },
+  stop: function() {
+    if (this._call) {
+      this._call = null;
+      this._time = Infinity;
+      sleep();
+    }
+  }
+};
+
+function timer(callback, delay, time) {
+  var t = new Timer;
+  t.restart(callback, delay, time);
+  return t;
+}
+
+function timerFlush() {
+  now(); // Get the current time, if not already set.
+  ++frame; // Pretend we’ve set an alarm, if we haven’t already.
+  var t = taskHead, e;
+  while (t) {
+    if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
+    t = t._next;
+  }
+  --frame;
+}
+
+function wake() {
+  clockNow = (clockLast = clock.now()) + clockSkew;
+  frame = timeout = 0;
+  try {
+    timerFlush();
+  } finally {
+    frame = 0;
+    nap();
+    clockNow = 0;
+  }
+}
+
+function poke() {
+  var now = clock.now(), delay = now - clockLast;
+  if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
+}
+
+function nap() {
+  var t0, t1 = taskHead, t2, time = Infinity;
+  while (t1) {
+    if (t1._call) {
+      if (time > t1._time) time = t1._time;
+      t0 = t1, t1 = t1._next;
+    } else {
+      t2 = t1._next, t1._next = null;
+      t1 = t0 ? t0._next = t2 : taskHead = t2;
+    }
+  }
+  taskTail = t0;
+  sleep(time);
+}
+
+function sleep(time) {
+  if (frame) return; // Soonest alarm already set, or will be.
+  if (timeout) timeout = clearTimeout(timeout);
+  var delay = time - clockNow;
+  if (delay > 24) {
+    if (time < Infinity) timeout = setTimeout(wake, delay);
+    if (interval) interval = clearInterval(interval);
+  } else {
+    if (!interval) clockLast = clockNow, interval = setInterval(poke, pokeDelay);
+    frame = 1, setFrame(wake);
+  }
+}
+
+var timeout$1 = function(callback, delay, time) {
+  var t = new Timer;
+  delay = delay == null ? 0 : +delay;
+  t.restart(function(elapsed) {
+    t.stop();
+    callback(elapsed + delay);
+  }, delay, time);
+  return t;
+};
+
+var interval$1 = function(callback, delay, time) {
+  var t = new Timer, total = delay;
+  if (delay == null) return t.restart(callback, delay, time), t;
+  delay = +delay, time = time == null ? now() : +time;
+  t.restart(function tick(elapsed) {
+    elapsed += total;
+    t.restart(tick, total += delay, time);
+    callback(elapsed);
+  }, delay, time);
+  return t;
+};
+
+exports.now = now;
+exports.timer = timer;
+exports.timerFlush = timerFlush;
+exports.timeout = timeout$1;
+exports.interval = interval$1;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+
+},{}],17:[function(require,module,exports){
+// https://d3js.org/d3-transition/ Version 1.1.0. Copyright 2017 Mike Bostock.
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-selection'), require('d3-dispatch'), require('d3-timer'), require('d3-interpolate'), require('d3-color'), require('d3-ease')) :
+	typeof define === 'function' && define.amd ? define(['exports', 'd3-selection', 'd3-dispatch', 'd3-timer', 'd3-interpolate', 'd3-color', 'd3-ease'], factory) :
+	(factory((global.d3 = global.d3 || {}),global.d3,global.d3,global.d3,global.d3,global.d3,global.d3));
+}(this, (function (exports,d3Selection,d3Dispatch,d3Timer,d3Interpolate,d3Color,d3Ease) { 'use strict';
+
+var emptyOn = d3Dispatch.dispatch("start", "end", "interrupt");
+var emptyTween = [];
+
+var CREATED = 0;
+var SCHEDULED = 1;
+var STARTING = 2;
+var STARTED = 3;
+var RUNNING = 4;
+var ENDING = 5;
+var ENDED = 6;
+
+var schedule = function(node, name, id, index, group, timing) {
+  var schedules = node.__transition;
+  if (!schedules) node.__transition = {};
+  else if (id in schedules) return;
+  create(node, id, {
+    name: name,
+    index: index, // For context during callback.
+    group: group, // For context during callback.
+    on: emptyOn,
+    tween: emptyTween,
+    time: timing.time,
+    delay: timing.delay,
+    duration: timing.duration,
+    ease: timing.ease,
+    timer: null,
+    state: CREATED
+  });
+};
+
+function init(node, id) {
+  var schedule = node.__transition;
+  if (!schedule || !(schedule = schedule[id]) || schedule.state > CREATED) throw new Error("too late");
+  return schedule;
+}
+
+function set(node, id) {
+  var schedule = node.__transition;
+  if (!schedule || !(schedule = schedule[id]) || schedule.state > STARTING) throw new Error("too late");
+  return schedule;
+}
+
+function get(node, id) {
+  var schedule = node.__transition;
+  if (!schedule || !(schedule = schedule[id])) throw new Error("too late");
+  return schedule;
+}
+
+function create(node, id, self) {
+  var schedules = node.__transition,
+      tween;
+
+  // Initialize the self timer when the transition is created.
+  // Note the actual delay is not known until the first callback!
+  schedules[id] = self;
+  self.timer = d3Timer.timer(schedule, 0, self.time);
+
+  function schedule(elapsed) {
+    self.state = SCHEDULED;
+    self.timer.restart(start, self.delay, self.time);
+
+    // If the elapsed delay is less than our first sleep, start immediately.
+    if (self.delay <= elapsed) start(elapsed - self.delay);
+  }
+
+  function start(elapsed) {
+    var i, j, n, o;
+
+    // If the state is not SCHEDULED, then we previously errored on start.
+    if (self.state !== SCHEDULED) return stop();
+
+    for (i in schedules) {
+      o = schedules[i];
+      if (o.name !== self.name) continue;
+
+      // While this element already has a starting transition during this frame,
+      // defer starting an interrupting transition until that transition has a
+      // chance to tick (and possibly end); see d3/d3-transition#54!
+      if (o.state === STARTED) return d3Timer.timeout(start);
+
+      // Interrupt the active transition, if any.
+      // Dispatch the interrupt event.
+      if (o.state === RUNNING) {
+        o.state = ENDED;
+        o.timer.stop();
+        o.on.call("interrupt", node, node.__data__, o.index, o.group);
+        delete schedules[i];
+      }
+
+      // Cancel any pre-empted transitions. No interrupt event is dispatched
+      // because the cancelled transitions never started. Note that this also
+      // removes this transition from the pending list!
+      else if (+i < id) {
+        o.state = ENDED;
+        o.timer.stop();
+        delete schedules[i];
+      }
+    }
+
+    // Defer the first tick to end of the current frame; see d3/d3#1576.
+    // Note the transition may be canceled after start and before the first tick!
+    // Note this must be scheduled before the start event; see d3/d3-transition#16!
+    // Assuming this is successful, subsequent callbacks go straight to tick.
+    d3Timer.timeout(function() {
+      if (self.state === STARTED) {
+        self.state = RUNNING;
+        self.timer.restart(tick, self.delay, self.time);
+        tick(elapsed);
+      }
+    });
+
+    // Dispatch the start event.
+    // Note this must be done before the tween are initialized.
+    self.state = STARTING;
+    self.on.call("start", node, node.__data__, self.index, self.group);
+    if (self.state !== STARTING) return; // interrupted
+    self.state = STARTED;
+
+    // Initialize the tween, deleting null tween.
+    tween = new Array(n = self.tween.length);
+    for (i = 0, j = -1; i < n; ++i) {
+      if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
+        tween[++j] = o;
+      }
+    }
+    tween.length = j + 1;
+  }
+
+  function tick(elapsed) {
+    var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
+        i = -1,
+        n = tween.length;
+
+    while (++i < n) {
+      tween[i].call(null, t);
+    }
+
+    // Dispatch the end event.
+    if (self.state === ENDING) {
+      self.on.call("end", node, node.__data__, self.index, self.group);
+      stop();
+    }
+  }
+
+  function stop() {
+    self.state = ENDED;
+    self.timer.stop();
+    delete schedules[id];
+    for (var i in schedules) return; // eslint-disable-line no-unused-vars
+    delete node.__transition;
+  }
+}
+
+var interrupt = function(node, name) {
+  var schedules = node.__transition,
+      schedule,
+      active,
+      empty = true,
+      i;
+
+  if (!schedules) return;
+
+  name = name == null ? null : name + "";
+
+  for (i in schedules) {
+    if ((schedule = schedules[i]).name !== name) { empty = false; continue; }
+    active = schedule.state > STARTING && schedule.state < ENDING;
+    schedule.state = ENDED;
+    schedule.timer.stop();
+    if (active) schedule.on.call("interrupt", node, node.__data__, schedule.index, schedule.group);
+    delete schedules[i];
+  }
+
+  if (empty) delete node.__transition;
+};
+
+var selection_interrupt = function(name) {
+  return this.each(function() {
+    interrupt(this, name);
+  });
+};
+
+function tweenRemove(id, name) {
+  var tween0, tween1;
+  return function() {
+    var schedule = set(this, id),
+        tween = schedule.tween;
+
+    // If this node shared tween with the previous node,
+    // just assign the updated shared tween and we’re done!
+    // Otherwise, copy-on-write.
+    if (tween !== tween0) {
+      tween1 = tween0 = tween;
+      for (var i = 0, n = tween1.length; i < n; ++i) {
+        if (tween1[i].name === name) {
+          tween1 = tween1.slice();
+          tween1.splice(i, 1);
+          break;
+        }
+      }
+    }
+
+    schedule.tween = tween1;
+  };
+}
+
+function tweenFunction(id, name, value) {
+  var tween0, tween1;
+  if (typeof value !== "function") throw new Error;
+  return function() {
+    var schedule = set(this, id),
+        tween = schedule.tween;
+
+    // If this node shared tween with the previous node,
+    // just assign the updated shared tween and we’re done!
+    // Otherwise, copy-on-write.
+    if (tween !== tween0) {
+      tween1 = (tween0 = tween).slice();
+      for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) {
+        if (tween1[i].name === name) {
+          tween1[i] = t;
+          break;
+        }
+      }
+      if (i === n) tween1.push(t);
+    }
+
+    schedule.tween = tween1;
+  };
+}
+
+var transition_tween = function(name, value) {
+  var id = this._id;
+
+  name += "";
+
+  if (arguments.length < 2) {
+    var tween = get(this.node(), id).tween;
+    for (var i = 0, n = tween.length, t; i < n; ++i) {
+      if ((t = tween[i]).name === name) {
+        return t.value;
+      }
+    }
+    return null;
+  }
+
+  return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
+};
+
+function tweenValue(transition, name, value) {
+  var id = transition._id;
+
+  transition.each(function() {
+    var schedule = set(this, id);
+    (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
+  });
+
+  return function(node) {
+    return get(node, id).value[name];
+  };
+}
+
+var interpolate = function(a, b) {
+  var c;
+  return (typeof b === "number" ? d3Interpolate.interpolateNumber
+      : b instanceof d3Color.color ? d3Interpolate.interpolateRgb
+      : (c = d3Color.color(b)) ? (b = c, d3Interpolate.interpolateRgb)
+      : d3Interpolate.interpolateString)(a, b);
+};
+
+function attrRemove(name) {
+  return function() {
+    this.removeAttribute(name);
+  };
+}
+
+function attrRemoveNS(fullname) {
+  return function() {
+    this.removeAttributeNS(fullname.space, fullname.local);
+  };
+}
+
+function attrConstant(name, interpolate$$1, value1) {
+  var value00,
+      interpolate0;
+  return function() {
+    var value0 = this.getAttribute(name);
+    return value0 === value1 ? null
+        : value0 === value00 ? interpolate0
+        : interpolate0 = interpolate$$1(value00 = value0, value1);
+  };
+}
+
+function attrConstantNS(fullname, interpolate$$1, value1) {
+  var value00,
+      interpolate0;
+  return function() {
+    var value0 = this.getAttributeNS(fullname.space, fullname.local);
+    return value0 === value1 ? null
+        : value0 === value00 ? interpolate0
+        : interpolate0 = interpolate$$1(value00 = value0, value1);
+  };
+}
+
+function attrFunction(name, interpolate$$1, value) {
+  var value00,
+      value10,
+      interpolate0;
+  return function() {
+    var value0, value1 = value(this);
+    if (value1 == null) return void this.removeAttribute(name);
+    value0 = this.getAttribute(name);
+    return value0 === value1 ? null
+        : value0 === value00 && value1 === value10 ? interpolate0
+        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
+  };
+}
+
+function attrFunctionNS(fullname, interpolate$$1, value) {
+  var value00,
+      value10,
+      interpolate0;
+  return function() {
+    var value0, value1 = value(this);
+    if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);
+    value0 = this.getAttributeNS(fullname.space, fullname.local);
+    return value0 === value1 ? null
+        : value0 === value00 && value1 === value10 ? interpolate0
+        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
+  };
+}
+
+var transition_attr = function(name, value) {
+  var fullname = d3Selection.namespace(name), i = fullname === "transform" ? d3Interpolate.interpolateTransformSvg : interpolate;
+  return this.attrTween(name, typeof value === "function"
+      ? (fullname.local ? attrFunctionNS : attrFunction)(fullname, i, tweenValue(this, "attr." + name, value))
+      : value == null ? (fullname.local ? attrRemoveNS : attrRemove)(fullname)
+      : (fullname.local ? attrConstantNS : attrConstant)(fullname, i, value + ""));
+};
+
+function attrTweenNS(fullname, value) {
+  function tween() {
+    var node = this, i = value.apply(node, arguments);
+    return i && function(t) {
+      node.setAttributeNS(fullname.space, fullname.local, i(t));
+    };
+  }
+  tween._value = value;
+  return tween;
+}
+
+function attrTween(name, value) {
+  function tween() {
+    var node = this, i = value.apply(node, arguments);
+    return i && function(t) {
+      node.setAttribute(name, i(t));
+    };
+  }
+  tween._value = value;
+  return tween;
+}
+
+var transition_attrTween = function(name, value) {
+  var key = "attr." + name;
+  if (arguments.length < 2) return (key = this.tween(key)) && key._value;
+  if (value == null) return this.tween(key, null);
+  if (typeof value !== "function") throw new Error;
+  var fullname = d3Selection.namespace(name);
+  return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
+};
+
+function delayFunction(id, value) {
+  return function() {
+    init(this, id).delay = +value.apply(this, arguments);
+  };
+}
+
+function delayConstant(id, value) {
+  return value = +value, function() {
+    init(this, id).delay = value;
+  };
+}
+
+var transition_delay = function(value) {
+  var id = this._id;
+
+  return arguments.length
+      ? this.each((typeof value === "function"
+          ? delayFunction
+          : delayConstant)(id, value))
+      : get(this.node(), id).delay;
+};
+
+function durationFunction(id, value) {
+  return function() {
+    set(this, id).duration = +value.apply(this, arguments);
+  };
+}
+
+function durationConstant(id, value) {
+  return value = +value, function() {
+    set(this, id).duration = value;
+  };
+}
+
+var transition_duration = function(value) {
+  var id = this._id;
+
+  return arguments.length
+      ? this.each((typeof value === "function"
+          ? durationFunction
+          : durationConstant)(id, value))
+      : get(this.node(), id).duration;
+};
+
+function easeConstant(id, value) {
+  if (typeof value !== "function") throw new Error;
+  return function() {
+    set(this, id).ease = value;
+  };
+}
+
+var transition_ease = function(value) {
+  var id = this._id;
+
+  return arguments.length
+      ? this.each(easeConstant(id, value))
+      : get(this.node(), id).ease;
+};
+
+var transition_filter = function(match) {
+  if (typeof match !== "function") match = d3Selection.matcher(match);
+
+  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
+      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
+        subgroup.push(node);
+      }
+    }
+  }
+
+  return new Transition(subgroups, this._parents, this._name, this._id);
+};
+
+var transition_merge = function(transition) {
+  if (transition._id !== this._id) throw new Error;
+
+  for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
+      if (node = group0[i] || group1[i]) {
+        merge[i] = node;
+      }
+    }
+  }
+
+  for (; j < m0; ++j) {
+    merges[j] = groups0[j];
+  }
+
+  return new Transition(merges, this._parents, this._name, this._id);
+};
+
+function start(name) {
+  return (name + "").trim().split(/^|\s+/).every(function(t) {
+    var i = t.indexOf(".");
+    if (i >= 0) t = t.slice(0, i);
+    return !t || t === "start";
+  });
+}
+
+function onFunction(id, name, listener) {
+  var on0, on1, sit = start(name) ? init : set;
+  return function() {
+    var schedule = sit(this, id),
+        on = schedule.on;
+
+    // If this node shared a dispatch with the previous node,
+    // just assign the updated shared dispatch and we’re done!
+    // Otherwise, copy-on-write.
+    if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);
+
+    schedule.on = on1;
+  };
+}
+
+var transition_on = function(name, listener) {
+  var id = this._id;
+
+  return arguments.length < 2
+      ? get(this.node(), id).on.on(name)
+      : this.each(onFunction(id, name, listener));
+};
+
+function removeFunction(id) {
+  return function() {
+    var parent = this.parentNode;
+    for (var i in this.__transition) if (+i !== id) return;
+    if (parent) parent.removeChild(this);
+  };
+}
+
+var transition_remove = function() {
+  return this.on("end.remove", removeFunction(this._id));
+};
+
+var transition_select = function(select) {
+  var name = this._name,
+      id = this._id;
+
+  if (typeof select !== "function") select = d3Selection.selector(select);
+
+  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
+      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
+        if ("__data__" in node) subnode.__data__ = node.__data__;
+        subgroup[i] = subnode;
+        schedule(subgroup[i], name, id, i, subgroup, get(node, id));
+      }
+    }
+  }
+
+  return new Transition(subgroups, this._parents, name, id);
+};
+
+var transition_selectAll = function(select) {
+  var name = this._name,
+      id = this._id;
+
+  if (typeof select !== "function") select = d3Selection.selectorAll(select);
+
+  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+      if (node = group[i]) {
+        for (var children = select.call(node, node.__data__, i, group), child, inherit = get(node, id), k = 0, l = children.length; k < l; ++k) {
+          if (child = children[k]) {
+            schedule(child, name, id, k, children, inherit);
+          }
+        }
+        subgroups.push(children);
+        parents.push(node);
+      }
+    }
+  }
+
+  return new Transition(subgroups, parents, name, id);
+};
+
+var Selection = d3Selection.selection.prototype.constructor;
+
+var transition_selection = function() {
+  return new Selection(this._groups, this._parents);
+};
+
+function styleRemove(name, interpolate$$1) {
+  var value00,
+      value10,
+      interpolate0;
+  return function() {
+    var value0 = d3Selection.style(this, name),
+        value1 = (this.style.removeProperty(name), d3Selection.style(this, name));
+    return value0 === value1 ? null
+        : value0 === value00 && value1 === value10 ? interpolate0
+        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
+  };
+}
+
+function styleRemoveEnd(name) {
+  return function() {
+    this.style.removeProperty(name);
+  };
+}
+
+function styleConstant(name, interpolate$$1, value1) {
+  var value00,
+      interpolate0;
+  return function() {
+    var value0 = d3Selection.style(this, name);
+    return value0 === value1 ? null
+        : value0 === value00 ? interpolate0
+        : interpolate0 = interpolate$$1(value00 = value0, value1);
+  };
+}
+
+function styleFunction(name, interpolate$$1, value) {
+  var value00,
+      value10,
+      interpolate0;
+  return function() {
+    var value0 = d3Selection.style(this, name),
+        value1 = value(this);
+    if (value1 == null) value1 = (this.style.removeProperty(name), d3Selection.style(this, name));
+    return value0 === value1 ? null
+        : value0 === value00 && value1 === value10 ? interpolate0
+        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
+  };
+}
+
+var transition_style = function(name, value, priority) {
+  var i = (name += "") === "transform" ? d3Interpolate.interpolateTransformCss : interpolate;
+  return value == null ? this
+          .styleTween(name, styleRemove(name, i))
+          .on("end.style." + name, styleRemoveEnd(name))
+      : this.styleTween(name, typeof value === "function"
+          ? styleFunction(name, i, tweenValue(this, "style." + name, value))
+          : styleConstant(name, i, value + ""), priority);
+};
+
+function styleTween(name, value, priority) {
+  function tween() {
+    var node = this, i = value.apply(node, arguments);
+    return i && function(t) {
+      node.style.setProperty(name, i(t), priority);
+    };
+  }
+  tween._value = value;
+  return tween;
+}
+
+var transition_styleTween = function(name, value, priority) {
+  var key = "style." + (name += "");
+  if (arguments.length < 2) return (key = this.tween(key)) && key._value;
+  if (value == null) return this.tween(key, null);
+  if (typeof value !== "function") throw new Error;
+  return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
+};
+
+function textConstant(value) {
+  return function() {
+    this.textContent = value;
+  };
+}
+
+function textFunction(value) {
+  return function() {
+    var value1 = value(this);
+    this.textContent = value1 == null ? "" : value1;
+  };
+}
+
+var transition_text = function(value) {
+  return this.tween("text", typeof value === "function"
+      ? textFunction(tweenValue(this, "text", value))
+      : textConstant(value == null ? "" : value + ""));
+};
+
+var transition_transition = function() {
+  var name = this._name,
+      id0 = this._id,
+      id1 = newId();
+
+  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+      if (node = group[i]) {
+        var inherit = get(node, id0);
+        schedule(node, name, id1, i, group, {
+          time: inherit.time + inherit.delay + inherit.duration,
+          delay: 0,
+          duration: inherit.duration,
+          ease: inherit.ease
+        });
+      }
+    }
+  }
+
+  return new Transition(groups, this._parents, name, id1);
+};
+
+var id = 0;
+
+function Transition(groups, parents, name, id) {
+  this._groups = groups;
+  this._parents = parents;
+  this._name = name;
+  this._id = id;
+}
+
+function transition(name) {
+  return d3Selection.selection().transition(name);
+}
+
+function newId() {
+  return ++id;
+}
+
+var selection_prototype = d3Selection.selection.prototype;
+
+Transition.prototype = transition.prototype = {
+  constructor: Transition,
+  select: transition_select,
+  selectAll: transition_selectAll,
+  filter: transition_filter,
+  merge: transition_merge,
+  selection: transition_selection,
+  transition: transition_transition,
+  call: selection_prototype.call,
+  nodes: selection_prototype.nodes,
+  node: selection_prototype.node,
+  size: selection_prototype.size,
+  empty: selection_prototype.empty,
+  each: selection_prototype.each,
+  on: transition_on,
+  attr: transition_attr,
+  attrTween: transition_attrTween,
+  style: transition_style,
+  styleTween: transition_styleTween,
+  text: transition_text,
+  remove: transition_remove,
+  tween: transition_tween,
+  delay: transition_delay,
+  duration: transition_duration,
+  ease: transition_ease
+};
+
+var defaultTiming = {
+  time: null, // Set on use.
+  delay: 0,
+  duration: 250,
+  ease: d3Ease.easeCubicInOut
+};
+
+function inherit(node, id) {
+  var timing;
+  while (!(timing = node.__transition) || !(timing = timing[id])) {
+    if (!(node = node.parentNode)) {
+      return defaultTiming.time = d3Timer.now(), defaultTiming;
+    }
+  }
+  return timing;
+}
+
+var selection_transition = function(name) {
+  var id,
+      timing;
+
+  if (name instanceof Transition) {
+    id = name._id, name = name._name;
+  } else {
+    id = newId(), (timing = defaultTiming).time = d3Timer.now(), name = name == null ? null : name + "";
+  }
+
+  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+      if (node = group[i]) {
+        schedule(node, name, id, i, group, timing || inherit(node, id));
+      }
+    }
+  }
+
+  return new Transition(groups, this._parents, name, id);
+};
+
+d3Selection.selection.prototype.interrupt = selection_interrupt;
+d3Selection.selection.prototype.transition = selection_transition;
+
+var root = [null];
+
+var active = function(node, name) {
+  var schedules = node.__transition,
+      schedule,
+      i;
+
+  if (schedules) {
+    name = name == null ? null : name + "";
+    for (i in schedules) {
+      if ((schedule = schedules[i]).state > SCHEDULED && schedule.name === name) {
+        return new Transition([[node]], root, name, +i);
+      }
+    }
+  }
+
+  return null;
+};
+
+exports.transition = transition;
+exports.active = active;
+exports.interrupt = interrupt;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+
+},{"d3-color":4,"d3-dispatch":5,"d3-ease":6,"d3-interpolate":9,"d3-selection":12,"d3-timer":16}],18:[function(require,module,exports){
+/*
+  d3plus-color v0.6.2
+  Color functions that extent the ability of d3-color.
+  Copyright (c) 2017 D3plus - https://d3plus.org
+  @license MIT
+*/
+
+if (typeof Object.assign !== "function") {
+  Object.defineProperty(Object, "assign", {
+    value: function assign(target) {
+      "use strict";
+      if (target === null) {
+        throw new TypeError("Cannot convert undefined or null to object");
+      }
+
+      var to = Object(target);
+
+      for (var index = 1; index < arguments.length; index++) {
+        var nextSource = arguments[index];
+
+        if (nextSource !== null) {
+          for (var nextKey in nextSource) {
+            if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
+              to[nextKey] = nextSource[nextKey];
+            }
+          }
+        }
+      }
+      return to;
+    },
+    writable: true,
+    configurable: true
+  });
+}
+
+if (!Array.prototype.includes) {
+  Object.defineProperty(Array.prototype, "includes", {
+    value: function includes(searchElement, fromIndex) {
+
+      var o = Object(this);
+
+      var len = o.length >>> 0;
+
+      if (len === 0) return false;
+
+      var n = fromIndex | 0;
+
+      var k = Math.max(n >= 0 ? n : len - Math.abs(n), 0);
+
+      function sameValueZero(x, y) {
+        return x === y || typeof x === "number" && typeof y === "number" && isNaN(x) && isNaN(y);
+      }
+
+      while (k < len) {
+        if (sameValueZero(o[k], searchElement)) {
+          return true;
+        }
+        k++;
+      }
+
+      return false;
+    }
+  });
+}
+
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-color'), require('d3-scale')) :
+	typeof define === 'function' && define.amd ? define('d3plus-color', ['exports', 'd3-color', 'd3-scale'], factory) :
+	(factory((global.d3plus = {}),global.d3Color,global.d3Scale));
+}(this, (function (exports,d3Color,d3Scale) { 'use strict';
+
+/**
+    @function colorAdd
+    @desc Adds two colors together.
+    @param {String} c1 The first color, a valid CSS color string.
+    @param {String} c2 The second color, also a valid CSS color string.
+    @param {String} [o1 = 1] Value from 0 to 1 of the first color's opacity.
+    @param {String} [o2 = 1] Value from 0 to 1 of the first color's opacity.
+    @returns {String}
+*/
+function add(c1, c2, o1, o2) {
+  if ( o1 === void 0 ) o1 = 1;
+  if ( o2 === void 0 ) o2 = 1;
+
+  c1 = d3Color.hsl(c1);
+  c2 = d3Color.hsl(c2);
+  var d = Math.abs(c2.h * o2 - c1.h * o1);
+  if (d > 180) { d -= 360; }
+  var h = (Math.min(c1.h, c2.h) + d / 2) % 360;
+  var l = c1.l + (c2.l * o2 - c1.l * o1) / 2,
+        s = c1.s + (c2.s * o2 - c1.s * o1) / 2;
+  // a = o1 + (o2 - o1) / 2;
+  if (h < 0) { h += 360; }
+  return d3Color.hsl(("hsl(" + h + "," + (s * 100) + "%," + (l * 100) + "%)")).toString();
+  // return hsl(`hsl(${h},${s * 100}%,${l * 100}%,${a})`).toString();
+}
+
+/**
+    @namespace {Object} colorDefaults
+    @desc A set of default color values used when assigning colors based on data.
+      *
+      * | Name | Default | Description |
+      * |---|---|---|
+      * | dark | #444444 | Used in the [contrast](#contrast) function when the color given is very light. |
+      * | light | #f7f7f7 | Used in the [contrast](#contrast) function when the color given is very dark. |
+      * | missing | #cccccc | Used in the [assign](#assign) function when the value passed is `null` or `undefined`. |
+      * | off | #b22200 | Used in the [assign](#assign) function when the value passed is `false`. |
+      * | on | #224f20 | Used in the [assign](#assign) function when the value passed is `true`. |
+      * | scale | #b22200, #eace3f, #282f6b, #b35c1e, #224f20, #5f487c, #759143, #419391, #993c88, #e89c89, #ffee8d, #afd5e8, #f7ba77, #a5c697, #c5b5e5, #d1d392, #bbefd0, #e099cf | An ordinal scale used in the [assign](#assign) function for non-valid color strings and numbers. |
+*/
+var defaults = {
+  dark: "#444444",
+  light: "#f7f7f7",
+  missing: "#cccccc",
+  off: "#b22200",
+  on: "#224f20",
+  scale: d3Scale.scaleOrdinal().range([
+    "#b22200", "#282f6b", "#eace3f", "#b35c1e", "#224f20", "#5f487c",
+    "#759143", "#419391", "#993c88", "#e89c89", "#ffee8d", "#afd5e8",
+    "#f7ba77", "#a5c697", "#c5b5e5", "#d1d392", "#bbefd0", "#e099cf"
+  ])
+};
+
+/**
+    Returns a color based on a key, whether it is present in a user supplied object or in the default object.
+    @returns {String}
+    @private
+*/
+function getColor(k, u) {
+  if ( u === void 0 ) u = {};
+
+  return k in u ? u[k] : k in defaults ? defaults[k] : defaults.missing;
+}
+
+/**
+    @function colorAssign
+    @desc Assigns a color to a value using a predefined set of defaults.
+    @param {String} c A valid CSS color string.
+    @param {Object} [u = defaults] An object containing overrides of the default colors.
+    @returns {String}
+*/
+function assign(c, u) {
+  if ( u === void 0 ) u = {};
+
+
+  // If the value is null or undefined, set to grey.
+  if ([null, void 0].indexOf(c) >= 0) { return getColor("missing", u); }
+  // Else if the value is true, set to green.
+  else if (c === true) { return getColor("on", u); }
+  // Else if the value is false, set to red.
+  else if (c === false) { return getColor("off", u); }
+
+  var p = d3Color.color(c);
+  // If the value is not a valid color string, use the color scale.
+  if (!p) { return getColor("scale", u)(c); }
+
+  return c.toString();
+
+}
+
+/**
+    @function colorContrast
+    @desc A set of default color values used when assigning colors based on data.
+    @param {String} c A valid CSS color string.
+    @param {Object} [u = defaults] An object containing overrides of the default colors.
+    @returns {String}
+*/
+function contrast(c, u) {
+  if ( u === void 0 ) u = {};
+
+  c = d3Color.rgb(c);
+  var yiq = (c.r * 299 + c.g * 587 + c.b * 114) / 1000;
+  return yiq >= 128 ? getColor("dark", u) : getColor("light", u);
+}
+
+/**
+    @function colorLegible
+    @desc Darkens a color so that it will appear legible on a white background.
+    @param {String} c A valid CSS color string.
+    @returns {String}
+*/
+function legible(c) {
+  c = d3Color.hsl(c);
+  if (c.l > 0.45) {
+    if (c.s > 0.8) { c.s = 0.8; }
+    c.l = 0.45;
+  }
+  return c.toString();
+}
+
+/**
+    @function colorLighter
+    @desc Similar to d3.color.brighter, except that this also reduces saturation so that colors don't appear neon.
+    @param {String} c A valid CSS color string.
+    @param {String} [i = 0.5] A value from 0 to 1 dictating the strength of the function.
+    @returns {String}
+*/
+function lighter(c, i) {
+  if ( i === void 0 ) i = 0.5;
+
+  c = d3Color.hsl(c);
+  i *= 1 - c.l;
+  c.l += i;
+  c.s -= i;
+  return c.toString();
+}
+
+/**
+    @function colorSubtract
+    @desc Subtracts one color from another.
+    @param {String} c1 The base color, a valid CSS color string.
+    @param {String} c2 The color to remove from the base color, also a valid CSS color string.
+    @param {String} [o1 = 1] Value from 0 to 1 of the first color's opacity.
+    @param {String} [o2 = 1] Value from 0 to 1 of the first color's opacity.
+    @returns {String}
+*/
+function subtract(c1, c2, o1, o2) {
+  if ( o1 === void 0 ) o1 = 1;
+  if ( o2 === void 0 ) o2 = 1;
+
+  c1 = d3Color.hsl(c1);
+  c2 = d3Color.hsl(c2);
+  var d = c2.h * o2 - c1.h * o1;
+  if (Math.abs(d) > 180) { d -= 360; }
+  var h = (c1.h - d) % 360;
+  var l = c1.l - (c2.l * o2 - c1.l * o1) / 2,
+        s = c1.s - (c2.s * o2 - c1.s * o1) / 2;
+  // a = o1 - (o2 - o1) / 2;
+  if (h < 0) { h += 360; }
+  return d3Color.hsl(("hsl(" + h + "," + (s * 100) + "%," + (l * 100) + "%)")).toString();
+  // return hsl(`hsl(${h},${s * 100}%,${l * 100}%,${a})`).toString();
+}
+
+exports.colorAdd = add;
+exports.colorAssign = assign;
+exports.colorContrast = contrast;
+exports.colorDefaults = defaults;
+exports.colorLegible = legible;
+exports.colorLighter = lighter;
+exports.colorSubtract = subtract;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+
+
+},{"d3-color":4,"d3-scale":11}]},{},[1]);
diff --git a/docs/articles/sunburst-2-0-0_files/sund2b-binding-2.1.6/sund2b.js b/docs/articles/sunburst-2-0-0_files/sund2b-binding-2.1.6/sund2b.js
new file mode 100644
index 0000000..67b2544
--- /dev/null
+++ b/docs/articles/sunburst-2-0-0_files/sund2b-binding-2.1.6/sund2b.js
@@ -0,0 +1,133 @@
+HTMLWidgets.widget({
+
+  name: 'sund2b',
+
+  type: 'output',
+
+  factory: function(el, width, height) {
+
+    var sunburst = d2b.chartSunburst();
+    // make this publicly available for later customization by user
+    var instance = {
+      chart: sunburst
+    };
+
+    return {
+
+      renderValue: function(x) {
+
+        var colors = d3.scaleOrdinal(d3.schemeCategory20);
+
+        if(x.options.colors !== null){
+          // if an array then we assume the colors
+          //  represent an array of hexadecimal colors to be used
+          if(Array.isArray(x.options.colors)) {
+            try{
+              colors.range(x.options.colors)
+            } catch(e) {
+
+            }
+          }
+
+          // if an object with range then we assume
+          //  that this is an array of colors to be used as range
+          if(x.options.colors.range){
+            try{
+              colors.range(x.options.colors.range)
+            } catch(e) {
+
+            }
+          }
+
+          // if an object with domain then we assume
+          //  that this is an array of colors to be used as domain
+          //  for more precise control of the colors assigned
+          if(x.options.colors.domain){
+            try{
+              colors.domain(x.options.colors.domain);
+            } catch(e) {
+
+            }
+          }
+
+          // if a function then set to the function
+          if(typeof(x.options.colors) === "function") {
+            colors = x.options.colors;
+          }
+        }
+
+        sunburst.chartFrame().size({height: height});
+        sunburst.label(function(d) {
+          return d.name;
+        });
+        sunburst.color(function(d) {
+          return colors.call(this, d.name, d);
+        });
+        sunburst.sunburst().size(function(d) {
+          return d[x.options.valueField || "size"];
+        });
+        if(
+          x.options.hasOwnProperty("showLabels") &&
+          (x.options.showLabels===true || x.options.showLabels===false )
+        ) {
+          sunburst.sunburst().showLabels(x.options.showLabels);
+        }
+
+        if(x.options.hasOwnProperty("rootLabel") && x.options.rootLabel !== null) {
+          x.data.root.label = x.options.rootLabel;
+        }
+
+        d3.select(el).datum(x.data)
+          .transition()
+          .call(sunburst.advanced);
+
+
+        // set up a container for tasks to perform after completion
+        //  one example would be add callbacks for event handling
+        //  styling
+        if (!(typeof x.tasks === "undefined") ){
+          if ( (typeof x.tasks.length === "undefined") ||
+           (typeof x.tasks === "function" ) ) {
+             // handle a function not enclosed in array
+             // should be able to remove once using jsonlite
+             x.tasks = [x.tasks];
+          }
+          x.tasks.map(function(t){
+            // for each tasks call the task with el supplied as `this`
+            t.call({el:el,x:x,instance:instance});
+          });
+        }
+
+        // add x to instance for future reference
+        instance.x = x;
+
+      },
+
+      resize: function(width, height) {
+
+        var x = instance.x;
+        sunburst.chartFrame().size({height: height});
+        d3.select(el).call(sunburst);
+
+        // set up a container for tasks to perform after completion
+        //  one example would be add callbacks for event handling
+        //  styling
+        if (!(typeof x.tasks === "undefined") ){
+          if ( (typeof x.tasks.length === "undefined") ||
+           (typeof x.tasks === "function" ) ) {
+             // handle a function not enclosed in array
+             // should be able to remove once using jsonlite
+             x.tasks = [x.tasks];
+          }
+          x.tasks.map(function(t){
+            // for each tasks call the task with el supplied as `this`
+            t.call({el:el,x:x,instance:instance});
+          });
+        }
+      },
+
+      instance: instance
+
+    };
+  }
+});
diff --git a/docs/authors.html b/docs/authors.html
index ea58b88..1dc728c 100644
--- a/docs/authors.html
+++ b/docs/authors.html
@@ -8,11 +8,13 @@
 
 <title>Authors • sunburstR</title>
 
+
 <!-- jquery -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous" />
+
 <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script>
 
 <!-- bootstrap-toc -->
@@ -36,10 +38,12 @@
 
 
 
+
 <meta property="og:title" content="Authors" />
 
 
 
+
 <!-- mathjax -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
@@ -67,7 +71,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="index.html">sunburstR</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.4</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.6</span>
       </span>
     </div>
 
@@ -75,7 +79,7 @@
       <ul class="nav navbar-nav">
         <li>
   <a href="index.html">
-    <span class="fas fa fas fa-home fa-lg"></span>
+    <span class="fas fa-home fa-lg"></span>
      
   </a>
 </li>
@@ -98,11 +102,10 @@
   <a href="news/index.html">Changelog</a>
 </li>
       </ul>
-      
       <ul class="nav navbar-nav navbar-right">
         <li>
   <a href="https://github.com/timelyportfolio/sunburstR/">
-    <span class="fab fa fab fa-github fa-lg"></span>
+    <span class="fab fa-github fa-lg"></span>
      
   </a>
 </li>
@@ -161,7 +164,7 @@ <h1>Authors</h1>
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.5.1.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.6.1.</p>
 </div>
 
       </footer>
diff --git a/docs/index.html b/docs/index.html
index d409688..b0fe585 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -32,7 +32,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="index.html">sunburstR</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.4</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.6</span>
       </span>
     </div>
 
@@ -40,7 +40,7 @@
       <ul class="nav navbar-nav">
 <li>
   <a href="index.html">
-    <span class="fas fa fas fa-home fa-lg"></span>
+    <span class="fas fa-home fa-lg"></span>
      
   </a>
 </li>
@@ -66,7 +66,7 @@
 <ul class="nav navbar-nav navbar-right">
 <li>
   <a href="https://github.com/timelyportfolio/sunburstR/">
-    <span class="fab fa fab fa-github fa-lg"></span>
+    <span class="fab fa-github fa-lg"></span>
      
   </a>
 </li>
@@ -87,12 +87,12 @@
 <div id="help-mepay-me-to-use-improve-and-extend" class="section level3">
 <h3 class="hasAnchor">
 <a href="#help-mepay-me-to-use-improve-and-extend" class="anchor"></a>Help Me/Pay Me to Use, Improve, and Extend</h3>
-<p>Note: this is a working <a href="http://htmlwidgets.org"><code>htmlwidget</code></a> first <a href="http://www.buildingwidgets.com/blog/2015/7/2/week-26-sunburstr">released</a> in the <a href="http://buildingwidgets.org">Building Widgets</a> htmlwidget-a-week project. <code>sunburstR</code> has already seen extensive use in many projects across multiple domains. If you have any interest in collaborating with me on this project or applying <code>sunburstR</code>, please let me know (see <a href="http://www.buildingwidgets.com/blog/2016/2/12/time-isnt-money">Time Isn’t Money</a>).</p>
+<p>Note: this is a working <a href="https://www.htmlwidgets.org/"><code>htmlwidget</code></a> first <a href="https://www.buildingwidgets.com/blog/2015/7/2/week-26-sunburstr">released</a> in the <a href="https://www.buildingwidgets.com/">Building Widgets</a> htmlwidget-a-week project. <code>sunburstR</code> has already seen extensive use in many projects across multiple domains. If you have any interest in collaborating with me on this project or applying <code>sunburstR</code>, please let me know (see <a href="https://www.buildingwidgets.com/blog/2016/2/12/time-isnt-money">Time Isn’t Money</a>).</p>
 </div>
 <div id="sunburstr" class="section level1">
 <div class="page-header"><h1 class="hasAnchor">
 <a href="#sunburstr" class="anchor"></a>sunburstR</h1></div>
-<p>Easily make these interactive <code>d3.js</code> sequence sunburst charts in <code>R</code> modeled on this <a href="http://bl.ocks.org/kerryrodden/7090426">example</a> from Kerry Rodden. For more details, see this post <a href="http://www.buildingwidgets.com/blog/2015/7/2/week-26-sunburstr">Week 26 | sunburstR</a> from the BuildingWidgets blog.</p>
+<p>Easily make these interactive <code>d3.js</code> sequence sunburst charts in <code>R</code> modeled on this <a href="http://bl.ocks.org/kerryrodden/7090426">example</a> from Kerry Rodden. For more details, see this post <a href="https://www.buildingwidgets.com/blog/2015/7/2/week-26-sunburstr">Week 26 | sunburstR</a> from the BuildingWidgets blog.</p>
 <div id="examples" class="section level3">
 <h3 class="hasAnchor">
 <a href="#examples" class="anchor"></a>Examples</h3>
@@ -150,7 +150,7 @@ <h2>Developers</h2>
   <div class="dev-status">
 <h2>Dev status</h2>
 <ul class="list-unstyled">
-<li><a href="https://travis-ci.org/timelyportfolio/sunburstR"><img src="https://travis-ci.org/timelyportfolio/sunburstR.svg?branch=master" alt="Travis-CI Build Status"></a></li>
+<li><a href="https://github.com/timelyportfolio/sunburstR/actions"><img src="https://github.com/timelyportfolio/sunburstR/workflows/R-CMD-check/badge.svg" alt="R-CMD-check"></a></li>
 <li><a href="https://cran.r-project.org/package=sunburstR"><img src="http://www.r-pkg.org/badges/version/sunburstR" alt="CRAN_Status_Badge"></a></li>
 </ul>
 </div>
@@ -163,7 +163,7 @@ <h2>Dev status</h2>
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.5.1.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.6.1.</p>
 </div>
 
       </footer>
diff --git a/docs/news/index.html b/docs/news/index.html
index ebddf5c..af11ccc 100644
--- a/docs/news/index.html
+++ b/docs/news/index.html
@@ -8,11 +8,13 @@
 
 <title>Changelog • sunburstR</title>
 
+
 <!-- jquery -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous" />
+
 <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script>
 
 <!-- bootstrap-toc -->
@@ -36,10 +38,12 @@
 
 
 
+
 <meta property="og:title" content="Changelog" />
 
 
 
+
 <!-- mathjax -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
@@ -67,7 +71,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">sunburstR</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.4</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.6</span>
       </span>
     </div>
 
@@ -75,7 +79,7 @@
       <ul class="nav navbar-nav">
         <li>
   <a href="../index.html">
-    <span class="fas fa fas fa-home fa-lg"></span>
+    <span class="fas fa-home fa-lg"></span>
      
   </a>
 </li>
@@ -98,11 +102,10 @@
   <a href="../news/index.html">Changelog</a>
 </li>
       </ul>
-      
       <ul class="nav navbar-nav navbar-right">
         <li>
   <a href="https://github.com/timelyportfolio/sunburstR/">
-    <span class="fab fa fab fa-github fa-lg"></span>
+    <span class="fab fa-github fa-lg"></span>
      
   </a>
 </li>
@@ -123,9 +126,26 @@ <h1 data-toc-skip>Changelog <small></small></h1>
       <small>Source: <a href='https://github.com/timelyportfolio/sunburstR/blob/master/NEWS.md'><code>NEWS.md</code></a></small>
     </div>
 
+    <div id="sunburstr-216" class="section level1">
+<h1 class="page-header" data-toc-text="2.1.6">
+<a href="#sunburstr-216" class="anchor"></a>sunburstR 2.1.6<small> Unreleased </small>
+</h1>
+<ul>
+<li>add labels for slices based on <a href="https://bl.ocks.org/vasturiano/12da9071095fbd4df434e60d52d2d58d" class="uri">https://bl.ocks.org/vasturiano/12da9071095fbd4df434e60d52d2d58d</a>
+</li>
+</ul>
+</div>
+    <div id="sunburstr-215" class="section level1">
+<h1 class="page-header" data-toc-text="2.1.5">
+<a href="#sunburstr-215" class="anchor"></a>sunburstR 2.1.5<small> 2020-10-08 </small>
+</h1>
+<ul>
+<li>fix bug in internal <code>csv_to_hier</code> converter; (see <a href="https://github.com/timelyportfolio/sunburstR/issues/107">issue 107</a>)</li>
+</ul>
+</div>
     <div id="sunburstr-214" class="section level1">
 <h1 class="page-header" data-toc-text="2.1.4">
-<a href="#sunburstr-214" class="anchor"></a>sunburstR 2.1.4<small> Unreleased </small>
+<a href="#sunburstr-214" class="anchor"></a>sunburstR 2.1.4<small> 2020-07-06 </small>
 </h1>
 <ul>
 <li>add showLabels argument to d2b; (see <a href="https://github.com/timelyportfolio/sunburstR/issues/71">issue 71</a>)</li>
@@ -322,7 +342,7 @@ <h2 data-toc-skip>Contents</h2>
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.5.1.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.6.1.</p>
 </div>
 
       </footer>
diff --git a/docs/pkgdown.css b/docs/pkgdown.css
index c01e592..1273238 100644
--- a/docs/pkgdown.css
+++ b/docs/pkgdown.css
@@ -244,14 +244,14 @@ nav[data-toggle='toc'] .nav .nav > .active:focus > a {
 
 .ref-index th {font-weight: normal;}
 
-.ref-index td {vertical-align: top;}
+.ref-index td {vertical-align: top; min-width: 100px}
 .ref-index .icon {width: 40px;}
 .ref-index .alias {width: 40%;}
 .ref-index-icons .alias {width: calc(40% - 40px);}
 .ref-index .title {width: 60%;}
 
 .ref-arguments th {text-align: right; padding-right: 10px;}
-.ref-arguments th, .ref-arguments td {vertical-align: top;}
+.ref-arguments th, .ref-arguments td {vertical-align: top; min-width: 100px}
 .ref-arguments .name {width: 20%;}
 .ref-arguments .desc {width: 80%;}
 
diff --git a/docs/pkgdown.yml b/docs/pkgdown.yml
index 0a3fb4f..cc63dd8 100644
--- a/docs/pkgdown.yml
+++ b/docs/pkgdown.yml
@@ -1,7 +1,7 @@
-pandoc: 2.7.3
-pkgdown: 1.5.1
+pandoc: 2.11.4
+pkgdown: 1.6.1
 pkgdown_sha: ~
 articles:
   sunburst-2-0-0: sunburst-2-0-0.html
-last_built: 2020-07-06T18:20Z
+last_built: 2021-09-19T19:12Z
 
diff --git a/docs/reference/Rplot001.png b/docs/reference/Rplot001.png
new file mode 100644
index 0000000000000000000000000000000000000000..17a358060aed2a86950757bbd25c6f92c08c458f
GIT binary patch
literal 1011
zcmeAS@N?(olHy`uVBq!ia0y~yV0-|=9Be?5+AI5}0x7m6Z+90U4Fo@(ch>_c&H|6f
zVg?3oArNM~bhqvg0|WD9PZ!6KiaBo&GBN^{G%5UFpXcEKVvd5*5Eu=C0SJK)8A6*F
U7`aXvEC5;V>FVdQ&MBb@00SN#Z2$lO

literal 0
HcmV?d00001

diff --git a/docs/reference/add_shiny.html b/docs/reference/add_shiny.html
index 0e16e5c..165d6d3 100644
--- a/docs/reference/add_shiny.html
+++ b/docs/reference/add_shiny.html
@@ -8,11 +8,13 @@
 
 <title>Add Shiny Events — add_shiny • sunburstR</title>
 
+
 <!-- jquery -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous" />
+
 <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script>
 
 <!-- bootstrap-toc -->
@@ -36,14 +38,13 @@
 
 
 
-<meta property="og:title" content="Add Shiny Events — add_shiny" />
 
+<meta property="og:title" content="Add Shiny Events — add_shiny" />
 <meta property="og:description" content="Add Shiny Events" />
 
 
 
 
-
 <!-- mathjax -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
@@ -71,7 +72,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">sunburstR</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.4</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.6</span>
       </span>
     </div>
 
@@ -79,7 +80,7 @@
       <ul class="nav navbar-nav">
         <li>
   <a href="../index.html">
-    <span class="fas fa fas fa-home fa-lg"></span>
+    <span class="fas fa-home fa-lg"></span>
      
   </a>
 </li>
@@ -102,11 +103,10 @@
   <a href="../news/index.html">Changelog</a>
 </li>
       </ul>
-      
       <ul class="nav navbar-nav navbar-right">
         <li>
   <a href="https://github.com/timelyportfolio/sunburstR/">
-    <span class="fab fa fab fa-github fa-lg"></span>
+    <span class="fab fa-github fa-lg"></span>
      
   </a>
 </li>
@@ -129,13 +129,11 @@ <h1>Add Shiny Events</h1>
     </div>
 
     <div class="ref-description">
-    
     <p>Add Shiny Events</p>
-    
     </div>
 
-    <pre class="usage"><span class='fu'>add_shiny</span>(<span class='kw'>sunburst</span> <span class='kw'>=</span> <span class='kw'>NULL</span>)</pre>
-    
+    <pre class="usage"><span class='fu'>add_shiny</span><span class='op'>(</span>sunburst <span class='op'>=</span> <span class='cn'>NULL</span><span class='op'>)</span></pre>
+
     <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arguments</h2>
     <table class="ref-arguments">
     <colgroup><col class="name" /><col class="desc" /></colgroup>
@@ -145,83 +143,83 @@ <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arg
 like to add event handling</p></td>
     </tr>
     </table>
-    
+
     <h2 class="hasAnchor" id="value"><a class="anchor" href="#value"></a>Value</h2>
 
     <p><code>sunburst</code> htmlwidget</p>
-    
 
     <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
-    <pre class="examples"><div class='input'><span class='kw'>if</span> (<span class='fl'>FALSE</span>) {
+    <pre class="examples"><div class='input'><span class='kw'>if</span> <span class='op'>(</span><span class='cn'>FALSE</span><span class='op'>)</span> <span class='op'>{</span>
 
-<span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>shiny</span>)
-<span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>sunburstR</span>)
+<span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'><a href='https://shiny.rstudio.com/'>shiny</a></span><span class='op'>)</span>
+<span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'><a href='https://github.com/timelyportfolio/sunburstR'>sunburstR</a></span><span class='op'>)</span>
 
-<span class='no'>sequences</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span>(
-  <span class='fu'><a href='https://rdrr.io/r/base/system.file.html'>system.file</a></span>(<span class='st'>"examples/visit-sequences.csv"</span>,<span class='kw'>package</span><span class='kw'>=</span><span class='st'>"sunburstR"</span>)
-  ,<span class='kw'>header</span><span class='kw'>=</span><span class='no'>F</span>
-  ,<span class='kw'>stringsAsFactors</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-)
+<span class='va'>sequences</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span><span class='op'>(</span>
+  <span class='fu'><a href='https://rdrr.io/r/base/system.file.html'>system.file</a></span><span class='op'>(</span><span class='st'>"examples/visit-sequences.csv"</span>,package<span class='op'>=</span><span class='st'>"sunburstR"</span><span class='op'>)</span>
+  ,header<span class='op'>=</span><span class='cn'>F</span>
+  ,stringsAsFactors <span class='op'>=</span> <span class='cn'>FALSE</span>
+<span class='op'>)</span>
 
 
-<span class='no'>server</span> <span class='kw'>&lt;-</span> <span class='kw'>function</span>(<span class='no'>input</span>,<span class='no'>output</span>,<span class='no'>session</span>){
+<span class='va'>server</span> <span class='op'>&lt;-</span> <span class='kw'>function</span><span class='op'>(</span><span class='va'>input</span>,<span class='va'>output</span>,<span class='va'>session</span><span class='op'>)</span><span class='op'>{</span>
 
-  <span class='no'>output</span>$<span class='no'>sunburst</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='sunburst-shiny.html'>renderSunburst</a></span>({
+  <span class='va'>output</span><span class='op'>$</span><span class='va'>sunburst</span> <span class='op'>&lt;-</span> <span class='fu'><a href='sunburst-shiny.html'>renderSunburst</a></span><span class='op'>(</span><span class='op'>{</span>
     <span class='co'>#invalidateLater(1000, session)</span>
 
-    <span class='no'>sequences</span> <span class='kw'>&lt;-</span> <span class='no'>sequences</span>[<span class='fu'><a href='https://rdrr.io/r/base/sample.html'>sample</a></span>(<span class='fu'><a href='https://rdrr.io/r/base/nrow.html'>nrow</a></span>(<span class='no'>sequences</span>),<span class='fl'>1000</span>),]
+    <span class='va'>sequences</span> <span class='op'>&lt;-</span> <span class='va'>sequences</span><span class='op'>[</span><span class='fu'><a href='https://rdrr.io/r/base/sample.html'>sample</a></span><span class='op'>(</span><span class='fu'><a href='https://rdrr.io/r/base/nrow.html'>nrow</a></span><span class='op'>(</span><span class='va'>sequences</span><span class='op'>)</span>,<span class='fl'>1000</span><span class='op'>)</span>,<span class='op'>]</span>
 
-    <span class='fu'>add_shiny</span>(<span class='fu'><a href='sunburst.html'>sunburst</a></span>(<span class='no'>sequences</span>))
-  })
+    <span class='fu'>add_shiny</span><span class='op'>(</span><span class='fu'><a href='sunburst.html'>sunburst</a></span><span class='op'>(</span><span class='va'>sequences</span><span class='op'>)</span><span class='op'>)</span>
+  <span class='op'>}</span><span class='op'>)</span>
 
 
-  <span class='no'>selection</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/pkg/shiny/man/reactive.html'>reactive</a></span>({
-    <span class='no'>input</span>$<span class='no'>sunburst_mouseover</span>
-  })
+  <span class='va'>selection</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/pkg/shiny/man/reactive.html'>reactive</a></span><span class='op'>(</span><span class='op'>{</span>
+    <span class='va'>input</span><span class='op'>$</span><span class='va'>sunburst_mouseover</span>
+  <span class='op'>}</span><span class='op'>)</span>
 
-  <span class='no'>output</span>$<span class='no'>selection</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/pkg/shiny/man/renderText.html'>renderText</a></span>(<span class='fu'>selection</span>())
-}
+  <span class='va'>output</span><span class='op'>$</span><span class='va'>selection</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/pkg/shiny/man/renderPrint.html'>renderText</a></span><span class='op'>(</span><span class='fu'>selection</span><span class='op'>(</span><span class='op'>)</span><span class='op'>)</span>
+<span class='op'>}</span>
 
 
-<span class='no'>ui</span><span class='kw'>&lt;-</span><span class='fu'><a href='https://rdrr.io/pkg/shiny/man/fluidPage.html'>fluidPage</a></span>(
-  <span class='fu'><a href='https://rdrr.io/pkg/shiny/man/sidebarLayout.html'>sidebarLayout</a></span>(
-    <span class='fu'><a href='https://rdrr.io/pkg/shiny/man/sidebarLayout.html'>sidebarPanel</a></span>(
+<span class='va'>ui</span><span class='op'>&lt;-</span><span class='fu'><a href='https://rdrr.io/pkg/shiny/man/fluidPage.html'>fluidPage</a></span><span class='op'>(</span>
+  <span class='fu'><a href='https://rdrr.io/pkg/shiny/man/sidebarLayout.html'>sidebarLayout</a></span><span class='op'>(</span>
+    <span class='fu'><a href='https://rdrr.io/pkg/shiny/man/sidebarLayout.html'>sidebarPanel</a></span><span class='op'>(</span>
 
-    ),
+    <span class='op'>)</span>,
 
     <span class='co'># plot sunburst</span>
-    <span class='fu'><a href='https://rdrr.io/pkg/shiny/man/sidebarLayout.html'>mainPanel</a></span>(
-      <span class='fu'><a href='sunburst-shiny.html'>sunburstOutput</a></span>(<span class='st'>"sunburst"</span>),
-      <span class='fu'><a href='https://rdrr.io/pkg/shiny/man/textOutput.html'>textOutput</a></span>(<span class='st'>"selection"</span>)
-    )
-  )
-)
+    <span class='fu'><a href='https://rdrr.io/pkg/shiny/man/sidebarLayout.html'>mainPanel</a></span><span class='op'>(</span>
+      <span class='fu'><a href='sunburst-shiny.html'>sunburstOutput</a></span><span class='op'>(</span><span class='st'>"sunburst"</span><span class='op'>)</span>,
+      <span class='fu'><a href='https://rdrr.io/pkg/shiny/man/textOutput.html'>textOutput</a></span><span class='op'>(</span><span class='st'>"selection"</span><span class='op'>)</span>
+    <span class='op'>)</span>
+  <span class='op'>)</span>
+<span class='op'>)</span>
 
-<span class='fu'><a href='https://rdrr.io/pkg/shiny/man/shinyApp.html'>shinyApp</a></span>(<span class='kw'>ui</span> <span class='kw'>=</span> <span class='no'>ui</span>, <span class='kw'>server</span> <span class='kw'>=</span> <span class='no'>server</span>)
+<span class='fu'><a href='https://rdrr.io/pkg/shiny/man/shinyApp.html'>shinyApp</a></span><span class='op'>(</span>ui <span class='op'>=</span> <span class='va'>ui</span>, server <span class='op'>=</span> <span class='va'>server</span><span class='op'>)</span>
 
 <span class='co'># an example with d2b sunburst and Shiny</span>
-<span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>shiny</span>)
-<span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>sunburstR</span>)
+<span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'><a href='https://shiny.rstudio.com/'>shiny</a></span><span class='op'>)</span>
+<span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'><a href='https://github.com/timelyportfolio/sunburstR'>sunburstR</a></span><span class='op'>)</span>
 
 <span class='co'># use a sample of the sequences csv data</span>
-<span class='no'>sequences</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span>(
-  <span class='fu'><a href='https://rdrr.io/r/base/system.file.html'>system.file</a></span>(<span class='st'>"examples/visit-sequences.csv"</span>,<span class='kw'>package</span><span class='kw'>=</span><span class='st'>"sunburstR"</span>)
-  ,<span class='kw'>header</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-  ,<span class='kw'>stringsAsFactors</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-)[<span class='fl'>1</span>:<span class='fl'>200</span>,]
+<span class='va'>sequences</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span><span class='op'>(</span>
+  <span class='fu'><a href='https://rdrr.io/r/base/system.file.html'>system.file</a></span><span class='op'>(</span><span class='st'>"examples/visit-sequences.csv"</span>,package<span class='op'>=</span><span class='st'>"sunburstR"</span><span class='op'>)</span>
+  ,header <span class='op'>=</span> <span class='cn'>FALSE</span>
+  ,stringsAsFactors <span class='op'>=</span> <span class='cn'>FALSE</span>
+<span class='op'>)</span><span class='op'>[</span><span class='fl'>1</span><span class='op'>:</span><span class='fl'>200</span>,<span class='op'>]</span>
 
 <span class='co'># create a d2b sunburst</span>
-<span class='no'>s2b</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='sund2b.html'>sund2b</a></span>(<span class='no'>sequences</span>)
-
-<span class='fu'><a href='https://rdrr.io/r/base/options.html'>options</a></span>(<span class='kw'>shiny.trace</span><span class='kw'>=</span><span class='fl'>TRUE</span>)
-<span class='no'>ui</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='d2b-shiny.html'>sund2bOutput</a></span>(<span class='st'>"s2b"</span>)
-<span class='no'>server</span> <span class='kw'>&lt;-</span> <span class='kw'>function</span>(<span class='no'>input</span>, <span class='no'>output</span>, <span class='no'>session</span>) {
-  <span class='no'>output</span>$<span class='no'>s2b</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='d2b-shiny.html'>renderSund2b</a></span>({
-    <span class='fu'>add_shiny</span>(<span class='no'>s2b</span>)
-  })
-}
-<span class='fu'><a href='https://rdrr.io/pkg/shiny/man/shinyApp.html'>shinyApp</a></span>(<span class='no'>ui</span>, <span class='no'>server</span>)
-}</div></pre>
+<span class='va'>s2b</span> <span class='op'>&lt;-</span> <span class='fu'><a href='sund2b.html'>sund2b</a></span><span class='op'>(</span><span class='va'>sequences</span><span class='op'>)</span>
+
+<span class='fu'><a href='https://rdrr.io/r/base/options.html'>options</a></span><span class='op'>(</span>shiny.trace<span class='op'>=</span><span class='cn'>TRUE</span><span class='op'>)</span>
+<span class='va'>ui</span> <span class='op'>&lt;-</span> <span class='fu'><a href='d2b-shiny.html'>sund2bOutput</a></span><span class='op'>(</span><span class='st'>"s2b"</span><span class='op'>)</span>
+<span class='va'>server</span> <span class='op'>&lt;-</span> <span class='kw'>function</span><span class='op'>(</span><span class='va'>input</span>, <span class='va'>output</span>, <span class='va'>session</span><span class='op'>)</span> <span class='op'>{</span>
+  <span class='va'>output</span><span class='op'>$</span><span class='va'>s2b</span> <span class='op'>&lt;-</span> <span class='fu'><a href='d2b-shiny.html'>renderSund2b</a></span><span class='op'>(</span><span class='op'>{</span>
+    <span class='fu'>add_shiny</span><span class='op'>(</span><span class='va'>s2b</span><span class='op'>)</span>
+  <span class='op'>}</span><span class='op'>)</span>
+<span class='op'>}</span>
+<span class='fu'><a href='https://rdrr.io/pkg/shiny/man/shinyApp.html'>shinyApp</a></span><span class='op'>(</span><span class='va'>ui</span>, <span class='va'>server</span><span class='op'>)</span>
+<span class='op'>}</span>
+</div></pre>
   </div>
   <div class="col-md-3 hidden-xs hidden-sm" id="pkgdown-sidebar">
     <nav id="toc" data-toggle="toc" class="sticky-top">
@@ -237,7 +235,7 @@ <h2 data-toc-skip>Contents</h2>
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.5.1.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.6.1.</p>
 </div>
 
       </footer>
diff --git a/docs/reference/d2b-shiny.html b/docs/reference/d2b-shiny.html
index b3243ed..4193c32 100644
--- a/docs/reference/d2b-shiny.html
+++ b/docs/reference/d2b-shiny.html
@@ -8,11 +8,13 @@
 
 <title>Shiny bindings for d2b — d2b-shiny • sunburstR</title>
 
+
 <!-- jquery -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous" />
+
 <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script>
 
 <!-- bootstrap-toc -->
@@ -36,15 +38,14 @@
 
 
 
-<meta property="og:title" content="Shiny bindings for d2b — d2b-shiny" />
 
+<meta property="og:title" content="Shiny bindings for d2b — d2b-shiny" />
 <meta property="og:description" content="Output and render functions for using d2b within Shiny
 applications and interactive Rmd documents." />
 
 
 
 
-
 <!-- mathjax -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
@@ -72,7 +73,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">sunburstR</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.4</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.6</span>
       </span>
     </div>
 
@@ -80,7 +81,7 @@
       <ul class="nav navbar-nav">
         <li>
   <a href="../index.html">
-    <span class="fas fa fas fa-home fa-lg"></span>
+    <span class="fas fa-home fa-lg"></span>
      
   </a>
 </li>
@@ -103,11 +104,10 @@
   <a href="../news/index.html">Changelog</a>
 </li>
       </ul>
-      
       <ul class="nav navbar-nav navbar-right">
         <li>
   <a href="https://github.com/timelyportfolio/sunburstR/">
-    <span class="fab fa fab fa-github fa-lg"></span>
+    <span class="fab fa-github fa-lg"></span>
      
   </a>
 </li>
@@ -130,16 +130,14 @@ <h1>Shiny bindings for d2b</h1>
     </div>
 
     <div class="ref-description">
-    
     <p>Output and render functions for using d2b within Shiny
 applications and interactive Rmd documents.</p>
-    
     </div>
 
-    <pre class="usage"><span class='fu'>sund2bOutput</span>(<span class='no'>outputId</span>, <span class='kw'>width</span> <span class='kw'>=</span> <span class='st'>"100%"</span>, <span class='kw'>height</span> <span class='kw'>=</span> <span class='st'>"400px"</span>)
+    <pre class="usage"><span class='fu'>sund2bOutput</span><span class='op'>(</span><span class='va'>outputId</span>, width <span class='op'>=</span> <span class='st'>"100%"</span>, height <span class='op'>=</span> <span class='st'>"400px"</span><span class='op'>)</span>
+
+<span class='fu'>renderSund2b</span><span class='op'>(</span><span class='va'>expr</span>, env <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/sys.parent.html'>parent.frame</a></span><span class='op'>(</span><span class='op'>)</span>, quoted <span class='op'>=</span> <span class='cn'>FALSE</span><span class='op'>)</span></pre>
 
-<span class='fu'>renderSund2b</span>(<span class='no'>expr</span>, <span class='kw'>env</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/sys.parent.html'>parent.frame</a></span>(), <span class='kw'>quoted</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>)</pre>
-    
     <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arguments</h2>
     <table class="ref-arguments">
     <colgroup><col class="name" /><col class="desc" /></colgroup>
@@ -167,7 +165,7 @@ <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arg
 is useful if you want to save an expression in a variable.</p></td>
     </tr>
     </table>
-    
+
 
   </div>
   <div class="col-md-3 hidden-xs hidden-sm" id="pkgdown-sidebar">
@@ -184,7 +182,7 @@ <h2 data-toc-skip>Contents</h2>
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.5.1.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.6.1.</p>
 </div>
 
       </footer>
diff --git a/docs/reference/index.html b/docs/reference/index.html
index 496ba1c..22bfdfd 100644
--- a/docs/reference/index.html
+++ b/docs/reference/index.html
@@ -8,11 +8,13 @@
 
 <title>Function reference • sunburstR</title>
 
+
 <!-- jquery -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous" />
+
 <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script>
 
 <!-- bootstrap-toc -->
@@ -36,10 +38,12 @@
 
 
 
+
 <meta property="og:title" content="Function reference" />
 
 
 
+
 <!-- mathjax -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
@@ -67,7 +71,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">sunburstR</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.4</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.6</span>
       </span>
     </div>
 
@@ -75,7 +79,7 @@
       <ul class="nav navbar-nav">
         <li>
   <a href="../index.html">
-    <span class="fas fa fas fa-home fa-lg"></span>
+    <span class="fas fa-home fa-lg"></span>
      
   </a>
 </li>
@@ -98,11 +102,10 @@
   <a href="../news/index.html">Changelog</a>
 </li>
       </ul>
-      
       <ul class="nav navbar-nav navbar-right">
         <li>
   <a href="https://github.com/timelyportfolio/sunburstR/">
-    <span class="fab fa fab fa-github fa-lg"></span>
+    <span class="fab fa-github fa-lg"></span>
      
   </a>
 </li>
@@ -203,7 +206,7 @@ <h2 data-toc-skip>Contents</h2>
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.5.1.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.6.1.</p>
 </div>
 
       </footer>
diff --git a/docs/reference/sunburst-shiny.html b/docs/reference/sunburst-shiny.html
index 2f34c20..6426ab4 100644
--- a/docs/reference/sunburst-shiny.html
+++ b/docs/reference/sunburst-shiny.html
@@ -8,11 +8,13 @@
 
 <title>Shiny bindings for sunburst — sunburst-shiny • sunburstR</title>
 
+
 <!-- jquery -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous" />
+
 <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script>
 
 <!-- bootstrap-toc -->
@@ -36,15 +38,14 @@
 
 
 
-<meta property="og:title" content="Shiny bindings for sunburst — sunburst-shiny" />
 
+<meta property="og:title" content="Shiny bindings for sunburst — sunburst-shiny" />
 <meta property="og:description" content="Output and render functions for using sunburst within Shiny
 applications and interactive Rmd documents." />
 
 
 
 
-
 <!-- mathjax -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
@@ -72,7 +73,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">sunburstR</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.4</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.6</span>
       </span>
     </div>
 
@@ -80,7 +81,7 @@
       <ul class="nav navbar-nav">
         <li>
   <a href="../index.html">
-    <span class="fas fa fas fa-home fa-lg"></span>
+    <span class="fas fa-home fa-lg"></span>
      
   </a>
 </li>
@@ -103,11 +104,10 @@
   <a href="../news/index.html">Changelog</a>
 </li>
       </ul>
-      
       <ul class="nav navbar-nav navbar-right">
         <li>
   <a href="https://github.com/timelyportfolio/sunburstR/">
-    <span class="fab fa fab fa-github fa-lg"></span>
+    <span class="fab fa-github fa-lg"></span>
      
   </a>
 </li>
@@ -130,16 +130,14 @@ <h1>Shiny bindings for sunburst</h1>
     </div>
 
     <div class="ref-description">
-    
     <p>Output and render functions for using sunburst within Shiny
 applications and interactive Rmd documents.</p>
-    
     </div>
 
-    <pre class="usage"><span class='fu'>sunburstOutput</span>(<span class='no'>outputId</span>, <span class='kw'>width</span> <span class='kw'>=</span> <span class='st'>"100%"</span>, <span class='kw'>height</span> <span class='kw'>=</span> <span class='st'>"400px"</span>)
+    <pre class="usage"><span class='fu'>sunburstOutput</span><span class='op'>(</span><span class='va'>outputId</span>, width <span class='op'>=</span> <span class='st'>"100%"</span>, height <span class='op'>=</span> <span class='st'>"400px"</span><span class='op'>)</span>
+
+<span class='fu'>renderSunburst</span><span class='op'>(</span><span class='va'>expr</span>, env <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/sys.parent.html'>parent.frame</a></span><span class='op'>(</span><span class='op'>)</span>, quoted <span class='op'>=</span> <span class='cn'>FALSE</span><span class='op'>)</span></pre>
 
-<span class='fu'>renderSunburst</span>(<span class='no'>expr</span>, <span class='kw'>env</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/sys.parent.html'>parent.frame</a></span>(), <span class='kw'>quoted</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>)</pre>
-    
     <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arguments</h2>
     <table class="ref-arguments">
     <colgroup><col class="name" /><col class="desc" /></colgroup>
@@ -167,7 +165,7 @@ <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arg
 is useful if you want to save an expression in a variable.</p></td>
     </tr>
     </table>
-    
+
 
   </div>
   <div class="col-md-3 hidden-xs hidden-sm" id="pkgdown-sidebar">
@@ -184,7 +182,7 @@ <h2 data-toc-skip>Contents</h2>
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.5.1.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.6.1.</p>
 </div>
 
       </footer>
diff --git a/docs/reference/sunburst.html b/docs/reference/sunburst.html
index dcc7fd3..ff6e619 100644
--- a/docs/reference/sunburst.html
+++ b/docs/reference/sunburst.html
@@ -8,11 +8,13 @@
 
 <title>`d3.js` Sequence Sunburst Diagrams — sunburst • sunburstR</title>
 
+
 <!-- jquery -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous" />
+
 <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script>
 
 <!-- bootstrap-toc -->
@@ -36,15 +38,14 @@
 
 
 
-<meta property="og:title" content="`d3.js` Sequence Sunburst Diagrams — sunburst" />
 
+<meta property="og:title" content="`d3.js` Sequence Sunburst Diagrams — sunburst" />
 <meta property="og:description" content="Sequences sunburst diagrams provide
    an interactive method of exploring sequence data, such as website navigation paths." />
 
 
 
 
-
 <!-- mathjax -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
@@ -72,7 +73,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">sunburstR</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.4</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.6</span>
       </span>
     </div>
 
@@ -80,7 +81,7 @@
       <ul class="nav navbar-nav">
         <li>
   <a href="../index.html">
-    <span class="fas fa fas fa-home fa-lg"></span>
+    <span class="fas fa-home fa-lg"></span>
      
   </a>
 </li>
@@ -103,11 +104,10 @@
   <a href="../news/index.html">Changelog</a>
 </li>
       </ul>
-      
       <ul class="nav navbar-nav navbar-right">
         <li>
   <a href="https://github.com/timelyportfolio/sunburstR/">
-    <span class="fab fa fab fa-github fa-lg"></span>
+    <span class="fab fa-github fa-lg"></span>
      
   </a>
 </li>
@@ -130,33 +130,31 @@ <h1>`d3.js` Sequence Sunburst Diagrams</h1>
     </div>
 
     <div class="ref-description">
-    
     <p><a href='https://gist.github.com/kerryrodden/7090426'>Sequences sunburst</a> diagrams provide
    an interactive method of exploring sequence data, such as website navigation paths.</p>
-    
     </div>
 
-    <pre class="usage"><span class='fu'>sunburst</span>(
-  <span class='kw'>data</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
-  <span class='kw'>legendOrder</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
-  <span class='kw'>colors</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
-  <span class='kw'>valueField</span> <span class='kw'>=</span> <span class='st'>"size"</span>,
-  <span class='kw'>percent</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>,
-  <span class='kw'>count</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>,
-  <span class='kw'>explanation</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
-  <span class='kw'>breadcrumb</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/list.html'>list</a></span>(),
-  <span class='kw'>legend</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/list.html'>list</a></span>(),
-  <span class='kw'>sortFunction</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
-  <span class='kw'>sumNodes</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>,
-  <span class='kw'>withD3</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>,
-  <span class='kw'>width</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
-  <span class='kw'>height</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
-  <span class='kw'>elementId</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
-  <span class='kw'>sizingPolicy</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
-  <span class='kw'>csvdata</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
-  <span class='kw'>jsondata</span> <span class='kw'>=</span> <span class='kw'>NULL</span>
-)</pre>
-    
+    <pre class="usage"><span class='fu'>sunburst</span><span class='op'>(</span>
+  data <span class='op'>=</span> <span class='cn'>NULL</span>,
+  legendOrder <span class='op'>=</span> <span class='cn'>NULL</span>,
+  colors <span class='op'>=</span> <span class='cn'>NULL</span>,
+  valueField <span class='op'>=</span> <span class='st'>"size"</span>,
+  percent <span class='op'>=</span> <span class='cn'>TRUE</span>,
+  count <span class='op'>=</span> <span class='cn'>FALSE</span>,
+  explanation <span class='op'>=</span> <span class='cn'>NULL</span>,
+  breadcrumb <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/list.html'>list</a></span><span class='op'>(</span><span class='op'>)</span>,
+  legend <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/list.html'>list</a></span><span class='op'>(</span><span class='op'>)</span>,
+  sortFunction <span class='op'>=</span> <span class='cn'>NULL</span>,
+  sumNodes <span class='op'>=</span> <span class='cn'>TRUE</span>,
+  withD3 <span class='op'>=</span> <span class='cn'>FALSE</span>,
+  width <span class='op'>=</span> <span class='cn'>NULL</span>,
+  height <span class='op'>=</span> <span class='cn'>NULL</span>,
+  elementId <span class='op'>=</span> <span class='cn'>NULL</span>,
+  sizingPolicy <span class='op'>=</span> <span class='cn'>NULL</span>,
+  csvdata <span class='op'>=</span> <span class='cn'>NULL</span>,
+  jsondata <span class='op'>=</span> <span class='cn'>NULL</span>
+<span class='op'>)</span></pre>
+
     <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arguments</h2>
     <table class="ref-arguments">
     <colgroup><col class="name" /><col class="desc" /></colgroup>
@@ -256,186 +254,186 @@ <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arg
       <td><p><code>deprecated</code> use data argument instead; data in nested d3 JSON hierarchy with `name:...,  children:[];`</p></td>
     </tr>
     </table>
-    
+
 
     <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
-    <pre class="examples"><div class='input'><span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>sunburstR</span>)
+    <pre class="examples"><div class='input'><span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'><a href='https://github.com/timelyportfolio/sunburstR'>sunburstR</a></span><span class='op'>)</span>
 
 <span class='co'># read in sample visit-sequences.csv data provided in source</span>
 <span class='co'># only use first 100 rows to speed package build and check</span>
 <span class='co'>#   https://gist.github.com/kerryrodden/7090426#file-visit-sequences-csv</span>
-<span class='no'>sequences</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span>(
-  <span class='fu'><a href='https://rdrr.io/r/base/system.file.html'>system.file</a></span>(<span class='st'>"examples/visit-sequences.csv"</span>,<span class='kw'>package</span><span class='kw'>=</span><span class='st'>"sunburstR"</span>)
-  ,<span class='kw'>header</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-  ,<span class='kw'>stringsAsFactors</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-)[<span class='fl'>1</span>:<span class='fl'>100</span>,]
+<span class='va'>sequences</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span><span class='op'>(</span>
+  <span class='fu'><a href='https://rdrr.io/r/base/system.file.html'>system.file</a></span><span class='op'>(</span><span class='st'>"examples/visit-sequences.csv"</span>,package<span class='op'>=</span><span class='st'>"sunburstR"</span><span class='op'>)</span>
+  ,header <span class='op'>=</span> <span class='cn'>FALSE</span>
+  ,stringsAsFactors <span class='op'>=</span> <span class='cn'>FALSE</span>
+<span class='op'>)</span><span class='op'>[</span><span class='fl'>1</span><span class='op'>:</span><span class='fl'>100</span>,<span class='op'>]</span>
 
-<span class='fu'>sunburst</span>(<span class='no'>sequences</span>)
+<span class='fu'>sunburst</span><span class='op'>(</span><span class='va'>sequences</span><span class='op'>)</span>
 
-<span class='kw'>if</span> (<span class='fl'>FALSE</span>) {
+<span class='kw'>if</span> <span class='op'>(</span><span class='cn'>FALSE</span><span class='op'>)</span> <span class='op'>{</span>
 
 <span class='co'># explore some of the arguments</span>
-<span class='fu'>sunburst</span>(
-  <span class='no'>sequences</span>
-  ,<span class='kw'>count</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>
-)
+<span class='fu'>sunburst</span><span class='op'>(</span>
+  <span class='va'>sequences</span>
+  ,count <span class='op'>=</span> <span class='cn'>TRUE</span>
+<span class='op'>)</span>
 
-<span class='fu'>sunburst</span>(
-  <span class='no'>sequences</span>
+<span class='fu'>sunburst</span><span class='op'>(</span>
+  <span class='va'>sequences</span>
   <span class='co'># apply sort order to the legends</span>
-  ,<span class='kw'>legendOrder</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/unique.html'>unique</a></span>(<span class='fu'><a href='https://rdrr.io/r/base/unlist.html'>unlist</a></span>(<span class='fu'><a href='https://rdrr.io/r/base/strsplit.html'>strsplit</a></span>(<span class='no'>sequences</span>[,<span class='fl'>1</span>],<span class='st'>"-"</span>)))
+  ,legendOrder <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/unique.html'>unique</a></span><span class='op'>(</span><span class='fu'><a href='https://rdrr.io/r/base/unlist.html'>unlist</a></span><span class='op'>(</span><span class='fu'><a href='https://rdrr.io/r/base/strsplit.html'>strsplit</a></span><span class='op'>(</span><span class='va'>sequences</span><span class='op'>[</span>,<span class='fl'>1</span><span class='op'>]</span>,<span class='st'>"-"</span><span class='op'>)</span><span class='op'>)</span><span class='op'>)</span>
   <span class='co'># just provide the name in the explanation in the center</span>
-  ,<span class='kw'>explanation</span> <span class='kw'>=</span> <span class='st'>"function(d){return d.data.name}"</span>
-)
+  ,explanation <span class='op'>=</span> <span class='st'>"function(d){return d.data.name}"</span>
+<span class='op'>)</span>
 
 
 <span class='co'># try with json data</span>
-<span class='no'>sequence_json</span> <span class='kw'>&lt;-</span> <span class='kw pkg'>jsonlite</span><span class='kw ns'>::</span><span class='fu'><a href='https://jeroen.cran.dev/jsonlite/reference/fromJSON.html'>fromJSON</a></span>(
-  <span class='fu'><a href='https://rdrr.io/r/base/system.file.html'>system.file</a></span>(<span class='st'>"examples/visit-sequences.json"</span>,<span class='kw'>package</span><span class='kw'>=</span><span class='st'>"sunburstR"</span>),
-  <span class='kw'>simplifyDataFrame</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-)
-<span class='fu'>sunburst</span>(<span class='no'>sequence_json</span>)
+<span class='va'>sequence_json</span> <span class='op'>&lt;-</span> <span class='fu'>jsonlite</span><span class='fu'>::</span><span class='fu'><a href='https://rdrr.io/pkg/jsonlite/man/fromJSON.html'>fromJSON</a></span><span class='op'>(</span>
+  <span class='fu'><a href='https://rdrr.io/r/base/system.file.html'>system.file</a></span><span class='op'>(</span><span class='st'>"examples/visit-sequences.json"</span>,package<span class='op'>=</span><span class='st'>"sunburstR"</span><span class='op'>)</span>,
+  simplifyDataFrame <span class='op'>=</span> <span class='cn'>FALSE</span>
+<span class='op'>)</span>
+<span class='fu'>sunburst</span><span class='op'>(</span><span class='va'>sequence_json</span><span class='op'>)</span>
 
 
 
 <span class='co'># try with csv data from this fork</span>
 <span class='co'>#  https://gist.github.com/mkajava/7515402</span>
 <span class='co'># great use for new breadbrumb wrapping</span>
-<span class='fu'>sunburst</span>(
-  <span class='kw'>csvdata</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span>(
-    <span class='kw'>file</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/paste.html'>paste0</a></span>(
+<span class='fu'>sunburst</span><span class='op'>(</span>
+  csvdata <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span><span class='op'>(</span>
+    file <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/paste.html'>paste0</a></span><span class='op'>(</span>
       <span class='st'>"https://gist.githubusercontent.com/mkajava/"</span>,
       <span class='st'>"7515402/raw/9f80d28094dc9dfed7090f8fb3376ef1539f4fd2/"</span>,
       <span class='st'>"comment-sequences.csv"</span>
-    )
-    ,<span class='kw'>header</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>
-    ,<span class='kw'>stringsAsFactors</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-  )
-)
+    <span class='op'>)</span>
+    ,header <span class='op'>=</span> <span class='cn'>TRUE</span>
+    ,stringsAsFactors <span class='op'>=</span> <span class='cn'>FALSE</span>
+  <span class='op'>)</span>
+<span class='op'>)</span>
 
 
 <span class='co'># try with csv data from this fork</span>
 <span class='co'>#  https://gist.github.com/rileycrane/92a2c36eb932b4f99e51/</span>
-<span class='fu'>sunburst</span>( <span class='kw'>csvdata</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span>(
-  <span class='kw'>file</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/paste.html'>paste0</a></span>(
+<span class='fu'>sunburst</span><span class='op'>(</span> csvdata <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span><span class='op'>(</span>
+  file <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/paste.html'>paste0</a></span><span class='op'>(</span>
     <span class='st'>"https://gist.githubusercontent.com/rileycrane/"</span>,
     <span class='st'>"92a2c36eb932b4f99e51/raw/"</span>,
     <span class='st'>"a0212b4ca8043af47ec82369aa5f023530279aa3/visit-sequences.csv"</span>
-  )
-  ,<span class='kw'>header</span><span class='kw'>=</span><span class='fl'>FALSE</span>
-  ,<span class='kw'>stringsAsFactors</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-))
-}
-<span class='kw'>if</span> (<span class='fl'>FALSE</span>) {
+  <span class='op'>)</span>
+  ,header<span class='op'>=</span><span class='cn'>FALSE</span>
+  ,stringsAsFactors <span class='op'>=</span> <span class='cn'>FALSE</span>
+<span class='op'>)</span><span class='op'>)</span>
+<span class='op'>}</span>
+<span class='kw'>if</span> <span class='op'>(</span><span class='cn'>FALSE</span><span class='op'>)</span> <span class='op'>{</span>
 <span class='co'>#  use sunburst to analyze ngram data from Peter Norvig</span>
 <span class='co'>#    http://norvig.com/mayzner.html</span>
 
-<span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>sunburstR</span>)
-<span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>pipeR</span>)
+<span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'><a href='https://github.com/timelyportfolio/sunburstR'>sunburstR</a></span><span class='op'>)</span>
+<span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'><a href='https://renkun.me/pipeR'>pipeR</a></span><span class='op'>)</span>
 
 <span class='co'>#  read the csv data downloaded from the Google Fusion Table linked in the article</span>
-<span class='no'>ngrams2</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span>(
-  <span class='fu'><a href='https://rdrr.io/r/base/system.file.html'>system.file</a></span>(
+<span class='va'>ngrams2</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span><span class='op'>(</span>
+  <span class='fu'><a href='https://rdrr.io/r/base/system.file.html'>system.file</a></span><span class='op'>(</span>
     <span class='st'>"examples/ngrams2.csv"</span>
-    ,<span class='kw'>package</span><span class='kw'>=</span><span class='st'>"sunburstR"</span>
-  )
-  , <span class='kw'>stringsAsFactors</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-)
+    ,package<span class='op'>=</span><span class='st'>"sunburstR"</span>
+  <span class='op'>)</span>
+  , stringsAsFactors <span class='op'>=</span> <span class='cn'>FALSE</span>
+<span class='op'>)</span>
 
-<span class='no'>ngrams2</span> <span class='kw'>%&gt;&gt;%</span>
+<span class='va'>ngrams2</span> <span class='op'>%&gt;&gt;%</span>
   <span class='co'>#  let's look at ngrams at the start of a word, so columns 1 and 3</span>
-  (<span class='no'>.</span>[,<span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span>(<span class='fl'>1</span>,<span class='fl'>3</span>)]) <span class='kw'>%&gt;&gt;%</span>
+  <span class='op'>(</span><span class='va'>.</span><span class='op'>[</span>,<span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span><span class='op'>(</span><span class='fl'>1</span>,<span class='fl'>3</span><span class='op'>)</span><span class='op'>]</span><span class='op'>)</span> <span class='op'>%&gt;&gt;%</span>
   <span class='co'>#  split the ngrams into a sequence by splitting each letter and adding -</span>
-  (
-    <span class='fu'><a href='https://rdrr.io/r/base/data.frame.html'>data.frame</a></span>(
-      <span class='kw'>sequence</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/strsplit.html'>strsplit</a></span>(<span class='no'>.</span>[,<span class='fl'>1</span>],<span class='st'>""</span>) <span class='kw'>%&gt;&gt;%</span>
-        <span class='fu'><a href='https://rdrr.io/r/base/lapply.html'>lapply</a></span>( <span class='kw'>function</span>(<span class='no'>ng</span>){ <span class='fu'><a href='https://rdrr.io/r/base/paste.html'>paste0</a></span>(<span class='no'>ng</span>,<span class='kw'>collapse</span> <span class='kw'>=</span> <span class='st'>"-"</span>) } ) <span class='kw'>%&gt;&gt;%</span>
-        <span class='no'>unlist</span>
-      ,<span class='kw'>freq</span> <span class='kw'>=</span> <span class='no'>.</span>[,<span class='fl'>2</span>]
-      ,<span class='kw'>stringsAsFactors</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-    )
-  ) <span class='kw'>%&gt;&gt;%</span>
-  <span class='no'>sunburst</span>
-
-
-<span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>htmltools</span>)
-
-<span class='no'>ngrams2</span> <span class='kw'>%&gt;&gt;%</span>
-  (
-    <span class='fu'><a href='https://rdrr.io/r/base/lapply.html'>lapply</a></span>(
-      <span class='fu'><a href='https://rdrr.io/r/base/seq.html'>seq.int</a></span>(<span class='fl'>3</span>,<span class='fu'><a href='https://rdrr.io/r/base/nrow.html'>ncol</a></span>(<span class='no'>.</span>))
-      ,<span class='kw'>function</span>(<span class='no'>letpos</span>){
-        (<span class='no'>.</span>[,<span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span>(<span class='fl'>1</span>,<span class='no'>letpos</span>)]) <span class='kw'>%&gt;&gt;%</span>
+  <span class='op'>(</span>
+    <span class='fu'><a href='https://rdrr.io/r/base/data.frame.html'>data.frame</a></span><span class='op'>(</span>
+      sequence <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/strsplit.html'>strsplit</a></span><span class='op'>(</span><span class='va'>.</span><span class='op'>[</span>,<span class='fl'>1</span><span class='op'>]</span>,<span class='st'>""</span><span class='op'>)</span> <span class='op'>%&gt;&gt;%</span>
+        <span class='fu'><a href='https://rdrr.io/r/base/lapply.html'>lapply</a></span><span class='op'>(</span> <span class='kw'>function</span><span class='op'>(</span><span class='va'>ng</span><span class='op'>)</span><span class='op'>{</span> <span class='fu'><a href='https://rdrr.io/r/base/paste.html'>paste0</a></span><span class='op'>(</span><span class='va'>ng</span>,collapse <span class='op'>=</span> <span class='st'>"-"</span><span class='op'>)</span> <span class='op'>}</span> <span class='op'>)</span> <span class='op'>%&gt;&gt;%</span>
+        <span class='va'>unlist</span>
+      ,freq <span class='op'>=</span> <span class='va'>.</span><span class='op'>[</span>,<span class='fl'>2</span><span class='op'>]</span>
+      ,stringsAsFactors <span class='op'>=</span> <span class='cn'>FALSE</span>
+    <span class='op'>)</span>
+  <span class='op'>)</span> <span class='op'>%&gt;&gt;%</span>
+  <span class='va'>sunburst</span>
+
+
+<span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'><a href='https://github.com/rstudio/htmltools'>htmltools</a></span><span class='op'>)</span>
+
+<span class='va'>ngrams2</span> <span class='op'>%&gt;&gt;%</span>
+  <span class='op'>(</span>
+    <span class='fu'><a href='https://rdrr.io/r/base/lapply.html'>lapply</a></span><span class='op'>(</span>
+      <span class='fu'><a href='https://rdrr.io/r/base/seq.html'>seq.int</a></span><span class='op'>(</span><span class='fl'>3</span>,<span class='fu'><a href='https://rdrr.io/r/base/nrow.html'>ncol</a></span><span class='op'>(</span><span class='va'>.</span><span class='op'>)</span><span class='op'>)</span>
+      ,<span class='kw'>function</span><span class='op'>(</span><span class='va'>letpos</span><span class='op'>)</span><span class='op'>{</span>
+        <span class='op'>(</span><span class='va'>.</span><span class='op'>[</span>,<span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span><span class='op'>(</span><span class='fl'>1</span>,<span class='va'>letpos</span><span class='op'>)</span><span class='op'>]</span><span class='op'>)</span> <span class='op'>%&gt;&gt;%</span>
           <span class='co'>#  split the ngrams into a sequence by splitting each letter and adding -</span>
-          (
-            <span class='fu'><a href='https://rdrr.io/r/base/data.frame.html'>data.frame</a></span>(
-              <span class='kw'>sequence</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/strsplit.html'>strsplit</a></span>(<span class='no'>.</span>[,<span class='fl'>1</span>],<span class='st'>""</span>) <span class='kw'>%&gt;&gt;%</span>
-                <span class='fu'><a href='https://rdrr.io/r/base/lapply.html'>lapply</a></span>( <span class='kw'>function</span>(<span class='no'>ng</span>){ <span class='fu'><a href='https://rdrr.io/r/base/paste.html'>paste0</a></span>(<span class='no'>ng</span>,<span class='kw'>collapse</span> <span class='kw'>=</span> <span class='st'>"-"</span>) } ) <span class='kw'>%&gt;&gt;%</span>
-                <span class='no'>unlist</span>
-              ,<span class='kw'>freq</span> <span class='kw'>=</span> <span class='no'>.</span>[,<span class='fl'>2</span>]
-              ,<span class='kw'>stringsAsFactors</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-            )
-          ) <span class='kw'>%&gt;&gt;%</span>
-          ( <span class='no'>tags</span>$<span class='fu'><a href='https://rdrr.io/pkg/htmltools/man/builder.html'>div</a></span>(<span class='kw'>style</span><span class='kw'>=</span><span class='st'>"float:left;"</span>,<span class='fu'>sunburst</span>( <span class='no'>.</span>, <span class='kw'>height</span> <span class='kw'>=</span> <span class='fl'>300</span>, <span class='kw'>width</span> <span class='kw'>=</span> <span class='fl'>300</span> )) )
-      }
-    )
-  ) <span class='kw'>%&gt;&gt;%</span>
-  <span class='no'>tagList</span> <span class='kw'>%&gt;&gt;%</span>
-  <span class='no'>browsable</span>
-}
-<span class='kw'>if</span> (<span class='fl'>FALSE</span>) {
-  <span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>treemap</span>)
-  <span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>sunburstR</span>)
-  <span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>d3r</span>)
+          <span class='op'>(</span>
+            <span class='fu'><a href='https://rdrr.io/r/base/data.frame.html'>data.frame</a></span><span class='op'>(</span>
+              sequence <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/strsplit.html'>strsplit</a></span><span class='op'>(</span><span class='va'>.</span><span class='op'>[</span>,<span class='fl'>1</span><span class='op'>]</span>,<span class='st'>""</span><span class='op'>)</span> <span class='op'>%&gt;&gt;%</span>
+                <span class='fu'><a href='https://rdrr.io/r/base/lapply.html'>lapply</a></span><span class='op'>(</span> <span class='kw'>function</span><span class='op'>(</span><span class='va'>ng</span><span class='op'>)</span><span class='op'>{</span> <span class='fu'><a href='https://rdrr.io/r/base/paste.html'>paste0</a></span><span class='op'>(</span><span class='va'>ng</span>,collapse <span class='op'>=</span> <span class='st'>"-"</span><span class='op'>)</span> <span class='op'>}</span> <span class='op'>)</span> <span class='op'>%&gt;&gt;%</span>
+                <span class='va'>unlist</span>
+              ,freq <span class='op'>=</span> <span class='va'>.</span><span class='op'>[</span>,<span class='fl'>2</span><span class='op'>]</span>
+              ,stringsAsFactors <span class='op'>=</span> <span class='cn'>FALSE</span>
+            <span class='op'>)</span>
+          <span class='op'>)</span> <span class='op'>%&gt;&gt;%</span>
+          <span class='op'>(</span> <span class='va'>tags</span><span class='op'>$</span><span class='fu'>div</span><span class='op'>(</span>style<span class='op'>=</span><span class='st'>"float:left;"</span>,<span class='fu'>sunburst</span><span class='op'>(</span> <span class='va'>.</span>, height <span class='op'>=</span> <span class='fl'>300</span>, width <span class='op'>=</span> <span class='fl'>300</span> <span class='op'>)</span><span class='op'>)</span> <span class='op'>)</span>
+      <span class='op'>}</span>
+    <span class='op'>)</span>
+  <span class='op'>)</span> <span class='op'>%&gt;&gt;%</span>
+  <span class='va'>tagList</span> <span class='op'>%&gt;&gt;%</span>
+  <span class='va'>browsable</span>
+<span class='op'>}</span>
+<span class='kw'>if</span> <span class='op'>(</span><span class='cn'>FALSE</span><span class='op'>)</span> <span class='op'>{</span>
+  <span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'>treemap</span><span class='op'>)</span>
+  <span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'><a href='https://github.com/timelyportfolio/sunburstR'>sunburstR</a></span><span class='op'>)</span>
+  <span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'><a href='https://github.com/timelyportfolio/d3r'>d3r</a></span><span class='op'>)</span>
 
   <span class='co'># use example from ?treemap::treemap</span>
-  <span class='fu'><a href='https://rdrr.io/r/utils/data.html'>data</a></span>(<span class='no'>GNI2014</span>)
-  <span class='no'>tm</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/pkg/treemap/man/treemap.html'>treemap</a></span>(<span class='no'>GNI2014</span>,
-          <span class='kw'>index</span><span class='kw'>=</span><span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span>(<span class='st'>"continent"</span>, <span class='st'>"iso3"</span>),
-          <span class='kw'>vSize</span><span class='kw'>=</span><span class='st'>"population"</span>,
-          <span class='kw'>vColor</span><span class='kw'>=</span><span class='st'>"continent"</span>,
-          <span class='kw'>type</span><span class='kw'>=</span><span class='st'>"index"</span>)
-
-  <span class='no'>tm_nest</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/pkg/d3r/man/d3_nest.html'>d3_nest</a></span>(
-    <span class='no'>tm</span>$<span class='no'>tm</span>[,<span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span>(<span class='st'>"continent"</span>, <span class='st'>"iso3"</span>, <span class='st'>"vSize"</span>, <span class='st'>"color"</span>)],
-    <span class='kw'>value_cols</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span>(<span class='st'>"vSize"</span>, <span class='st'>"color"</span>)
-  )
-
-  <span class='fu'>sunburst</span>(
-    <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>tm_nest</span>,
-    <span class='kw'>valueField</span> <span class='kw'>=</span> <span class='st'>"vSize"</span>,
-    <span class='kw'>count</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>,
+  <span class='fu'><a href='https://rdrr.io/r/utils/data.html'>data</a></span><span class='op'>(</span><span class='va'>GNI2014</span><span class='op'>)</span>
+  <span class='va'>tm</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/pkg/treemap/man/treemap.html'>treemap</a></span><span class='op'>(</span><span class='va'>GNI2014</span>,
+          index<span class='op'>=</span><span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span><span class='op'>(</span><span class='st'>"continent"</span>, <span class='st'>"iso3"</span><span class='op'>)</span>,
+          vSize<span class='op'>=</span><span class='st'>"population"</span>,
+          vColor<span class='op'>=</span><span class='st'>"continent"</span>,
+          type<span class='op'>=</span><span class='st'>"index"</span><span class='op'>)</span>
+
+  <span class='va'>tm_nest</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/pkg/d3r/man/d3_nest.html'>d3_nest</a></span><span class='op'>(</span>
+    <span class='va'>tm</span><span class='op'>$</span><span class='va'>tm</span><span class='op'>[</span>,<span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span><span class='op'>(</span><span class='st'>"continent"</span>, <span class='st'>"iso3"</span>, <span class='st'>"vSize"</span>, <span class='st'>"color"</span><span class='op'>)</span><span class='op'>]</span>,
+    value_cols <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span><span class='op'>(</span><span class='st'>"vSize"</span>, <span class='st'>"color"</span><span class='op'>)</span>
+  <span class='op'>)</span>
+
+  <span class='fu'>sunburst</span><span class='op'>(</span>
+    data <span class='op'>=</span> <span class='va'>tm_nest</span>,
+    valueField <span class='op'>=</span> <span class='st'>"vSize"</span>,
+    count <span class='op'>=</span> <span class='cn'>TRUE</span>,
     <span class='co'># to avoid double counting with pre-summed trees</span>
     <span class='co'># use sumNodes = FALSE</span>
-    <span class='kw'>sumNodes</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>,
-    <span class='kw'>colors</span> <span class='kw'>=</span> <span class='kw pkg'>htmlwidgets</span><span class='kw ns'>::</span><span class='fu'><a href='https://rdrr.io/pkg/htmlwidgets/man/JS.html'>JS</a></span>(<span class='st'>"function(d){return d3.select(this).datum().data.color;}"</span>),
-    <span class='kw'>withD3</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>
-  )
-}
+    sumNodes <span class='op'>=</span> <span class='cn'>FALSE</span>,
+    colors <span class='op'>=</span> <span class='fu'>htmlwidgets</span><span class='fu'>::</span><span class='fu'><a href='https://rdrr.io/pkg/htmlwidgets/man/JS.html'>JS</a></span><span class='op'>(</span><span class='st'>"function(d){return d3.select(this).datum().data.color;}"</span><span class='op'>)</span>,
+    withD3 <span class='op'>=</span> <span class='cn'>TRUE</span>
+  <span class='op'>)</span>
+<span class='op'>}</span>
 <span class='co'># calendar sunburst example</span>
 
-<span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>sunburstR</span>)
-
-<span class='no'>df</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/base/data.frame.html'>data.frame</a></span>(
-  <span class='kw'>date</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/seq.Date.html'>seq.Date</a></span>(
-    <span class='fu'><a href='https://rdrr.io/r/base/as.Date.html'>as.Date</a></span>(<span class='st'>'2014-01-01'</span>),
-    <span class='fu'><a href='https://rdrr.io/r/base/as.Date.html'>as.Date</a></span>(<span class='st'>'2016-12-31'</span>),
-    <span class='kw'>by</span> <span class='kw'>=</span> <span class='st'>"days"</span>
-  ),
-  <span class='kw'>stringsAsFactors</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-)
-
-<span class='no'>df</span>$<span class='no'>year</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/format.html'>format</a></span>(<span class='no'>df</span>$<span class='no'>date</span>, <span class='st'>"%Y"</span>)
-<span class='no'>df</span>$<span class='no'>quarter</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/paste.html'>paste0</a></span>(<span class='st'>"Q"</span>, <span class='fu'><a href='https://rdrr.io/r/base/Round.html'>ceiling</a></span>(<span class='fu'><a href='https://rdrr.io/r/base/numeric.html'>as.numeric</a></span>(<span class='fu'><a href='https://rdrr.io/r/base/format.html'>format</a></span>(<span class='no'>df</span>$<span class='no'>date</span>,<span class='st'>"%m"</span>))/<span class='fl'>3</span>))
-<span class='no'>df</span>$<span class='no'>month</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/format.html'>format</a></span>(<span class='no'>df</span>$<span class='no'>date</span>, <span class='st'>"%b"</span>)
-<span class='no'>df</span>$<span class='no'>path</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/paste.html'>paste</a></span>(<span class='no'>df</span>$<span class='no'>year</span>, <span class='no'>df</span>$<span class='no'>quarter</span>, <span class='no'>df</span>$<span class='no'>month</span>, <span class='kw'>sep</span><span class='kw'>=</span><span class='st'>"-"</span>)
-<span class='no'>df</span>$<span class='no'>count</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/rep.html'>rep</a></span>(<span class='fl'>1</span>, <span class='fu'><a href='https://rdrr.io/r/base/nrow.html'>nrow</a></span>(<span class='no'>df</span>))
-
-<span class='fu'>sunburst</span>(
-  <span class='fu'><a href='https://rdrr.io/r/base/data.frame.html'>data.frame</a></span>(<span class='fu'><a href='https://rdrr.io/r/stats/xtabs.html'>xtabs</a></span>(<span class='no'>count</span>~<span class='no'>path</span>,<span class='no'>df</span>)),
+<span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'><a href='https://github.com/timelyportfolio/sunburstR'>sunburstR</a></span><span class='op'>)</span>
+
+<span class='va'>df</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/base/data.frame.html'>data.frame</a></span><span class='op'>(</span>
+  date <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/seq.Date.html'>seq.Date</a></span><span class='op'>(</span>
+    <span class='fu'><a href='https://rdrr.io/r/base/as.Date.html'>as.Date</a></span><span class='op'>(</span><span class='st'>'2014-01-01'</span><span class='op'>)</span>,
+    <span class='fu'><a href='https://rdrr.io/r/base/as.Date.html'>as.Date</a></span><span class='op'>(</span><span class='st'>'2016-12-31'</span><span class='op'>)</span>,
+    by <span class='op'>=</span> <span class='st'>"days"</span>
+  <span class='op'>)</span>,
+  stringsAsFactors <span class='op'>=</span> <span class='cn'>FALSE</span>
+<span class='op'>)</span>
+
+<span class='va'>df</span><span class='op'>$</span><span class='va'>year</span> <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/format.html'>format</a></span><span class='op'>(</span><span class='va'>df</span><span class='op'>$</span><span class='va'>date</span>, <span class='st'>"%Y"</span><span class='op'>)</span>
+<span class='va'>df</span><span class='op'>$</span><span class='va'>quarter</span> <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/paste.html'>paste0</a></span><span class='op'>(</span><span class='st'>"Q"</span>, <span class='fu'><a href='https://rdrr.io/r/base/Round.html'>ceiling</a></span><span class='op'>(</span><span class='fu'><a href='https://rdrr.io/r/base/numeric.html'>as.numeric</a></span><span class='op'>(</span><span class='fu'><a href='https://rdrr.io/r/base/format.html'>format</a></span><span class='op'>(</span><span class='va'>df</span><span class='op'>$</span><span class='va'>date</span>,<span class='st'>"%m"</span><span class='op'>)</span><span class='op'>)</span><span class='op'>/</span><span class='fl'>3</span><span class='op'>)</span><span class='op'>)</span>
+<span class='va'>df</span><span class='op'>$</span><span class='va'>month</span> <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/format.html'>format</a></span><span class='op'>(</span><span class='va'>df</span><span class='op'>$</span><span class='va'>date</span>, <span class='st'>"%b"</span><span class='op'>)</span>
+<span class='va'>df</span><span class='op'>$</span><span class='va'>path</span> <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/paste.html'>paste</a></span><span class='op'>(</span><span class='va'>df</span><span class='op'>$</span><span class='va'>year</span>, <span class='va'>df</span><span class='op'>$</span><span class='va'>quarter</span>, <span class='va'>df</span><span class='op'>$</span><span class='va'>month</span>, sep<span class='op'>=</span><span class='st'>"-"</span><span class='op'>)</span>
+<span class='va'>df</span><span class='op'>$</span><span class='va'>count</span> <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/rep.html'>rep</a></span><span class='op'>(</span><span class='fl'>1</span>, <span class='fu'><a href='https://rdrr.io/r/base/nrow.html'>nrow</a></span><span class='op'>(</span><span class='va'>df</span><span class='op'>)</span><span class='op'>)</span>
+
+<span class='fu'>sunburst</span><span class='op'>(</span>
+  <span class='fu'><a href='https://rdrr.io/r/base/data.frame.html'>data.frame</a></span><span class='op'>(</span><span class='fu'><a href='https://rdrr.io/r/stats/xtabs.html'>xtabs</a></span><span class='op'>(</span><span class='va'>count</span><span class='op'>~</span><span class='va'>path</span>,<span class='va'>df</span><span class='op'>)</span><span class='op'>)</span>,
   <span class='co'># added a degree of difficulty by providing</span>
   <span class='co'>#  not easily sortable names</span>
-  <span class='kw'>sortFunction</span> <span class='kw'>=</span> <span class='kw pkg'>htmlwidgets</span><span class='kw ns'>::</span><span class='fu'><a href='https://rdrr.io/pkg/htmlwidgets/man/JS.html'>JS</a></span>(
+  sortFunction <span class='op'>=</span> <span class='fu'>htmlwidgets</span><span class='fu'>::</span><span class='fu'><a href='https://rdrr.io/pkg/htmlwidgets/man/JS.html'>JS</a></span><span class='op'>(</span>
 <span class='st'>"
 function(a,b){
   abb = {
@@ -462,24 +460,26 @@ <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examp
   return abb[a.data.name] - abb[b.data.name];
 }
 "</span>
-  )
-)
+  <span class='op'>)</span>
+<span class='op'>)</span>
 <span class='co'># sorting example: place data in order of occurence</span>
 
-<span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>sunburstR</span>)
+<span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'><a href='https://github.com/timelyportfolio/sunburstR'>sunburstR</a></span><span class='op'>)</span>
 
-<span class='no'>df</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/base/data.frame.html'>data.frame</a></span>(
-  <span class='kw'>group</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span>(<span class='st'>"foo"</span>, <span class='st'>"bar"</span>, <span class='st'>"xyz"</span>),
-  <span class='kw'>value</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span>(<span class='fl'>1</span>, <span class='fl'>3</span>, <span class='fl'>2</span>)
-)
+<span class='va'>df</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/base/data.frame.html'>data.frame</a></span><span class='op'>(</span>
+  group <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span><span class='op'>(</span><span class='st'>"foo"</span>, <span class='st'>"bar"</span>, <span class='st'>"xyz"</span><span class='op'>)</span>,
+  value <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span><span class='op'>(</span><span class='fl'>1</span>, <span class='fl'>3</span>, <span class='fl'>2</span><span class='op'>)</span>
+<span class='op'>)</span>
 
-<span class='fu'>sunburst</span>(<span class='no'>df</span>,
+<span class='fu'>sunburst</span><span class='op'>(</span><span class='va'>df</span>,
          <span class='co'># create a trivial sort function</span>
-         <span class='kw'>sortFunction</span> <span class='kw'>=</span> <span class='kw pkg'>htmlwidgets</span><span class='kw ns'>::</span><span class='fu'><a href='https://rdrr.io/pkg/htmlwidgets/man/JS.html'>JS</a></span>(<span class='st'>'function(x) {return x;}'</span>))
+         sortFunction <span class='op'>=</span> <span class='fu'>htmlwidgets</span><span class='fu'>::</span><span class='fu'><a href='https://rdrr.io/pkg/htmlwidgets/man/JS.html'>JS</a></span><span class='op'>(</span><span class='st'>'function(x) {return x;}'</span><span class='op'>)</span><span class='op'>)</span>
+
+<span class='va'>new_order</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span><span class='op'>(</span><span class='fl'>3</span>,<span class='fl'>2</span>,<span class='fl'>1</span><span class='op'>)</span>
+<span class='fu'>sunburst</span><span class='op'>(</span><span class='va'>df</span><span class='op'>[</span><span class='va'>new_order</span>,<span class='op'>]</span>,
+         sortFunction <span class='op'>=</span> <span class='fu'>htmlwidgets</span><span class='fu'>::</span><span class='fu'><a href='https://rdrr.io/pkg/htmlwidgets/man/JS.html'>JS</a></span><span class='op'>(</span><span class='st'>'function(x) {return x;}'</span><span class='op'>)</span><span class='op'>)</span>
 
-<span class='no'>new_order</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span>(<span class='fl'>3</span>,<span class='fl'>2</span>,<span class='fl'>1</span>)
-<span class='fu'>sunburst</span>(<span class='no'>df</span>[<span class='no'>new_order</span>,],
-         <span class='kw'>sortFunction</span> <span class='kw'>=</span> <span class='kw pkg'>htmlwidgets</span><span class='kw ns'>::</span><span class='fu'><a href='https://rdrr.io/pkg/htmlwidgets/man/JS.html'>JS</a></span>(<span class='st'>'function(x) {return x;}'</span>))</div></pre>
+</div></pre>
   </div>
   <div class="col-md-3 hidden-xs hidden-sm" id="pkgdown-sidebar">
     <nav id="toc" data-toggle="toc" class="sticky-top">
@@ -495,7 +495,7 @@ <h2 data-toc-skip>Contents</h2>
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.5.1.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.6.1.</p>
 </div>
 
       </footer>
diff --git a/docs/reference/sund2b.html b/docs/reference/sund2b.html
index 3f31073..7a7cbf9 100644
--- a/docs/reference/sund2b.html
+++ b/docs/reference/sund2b.html
@@ -8,11 +8,13 @@
 
 <title>Sunburst Using 'd2b' — sund2b • sunburstR</title>
 
+
 <!-- jquery -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous" />
+
 <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script>
 
 <!-- bootstrap-toc -->
@@ -36,14 +38,13 @@
 
 
 
-<meta property="og:title" content="Sunburst Using 'd2b' — sund2b" />
 
+<meta property="og:title" content="Sunburst Using 'd2b' — sund2b" />
 <meta property="og:description" content="Create interactive sunburst chart with the 'd2b' charting library." />
 
 
 
 
-
 <!-- mathjax -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
@@ -71,7 +72,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">sunburstR</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.4</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.6</span>
       </span>
     </div>
 
@@ -79,7 +80,7 @@
       <ul class="nav navbar-nav">
         <li>
   <a href="../index.html">
-    <span class="fas fa fas fa-home fa-lg"></span>
+    <span class="fas fa-home fa-lg"></span>
      
   </a>
 </li>
@@ -102,11 +103,10 @@
   <a href="../news/index.html">Changelog</a>
 </li>
       </ul>
-      
       <ul class="nav navbar-nav navbar-right">
         <li>
   <a href="https://github.com/timelyportfolio/sunburstR/">
-    <span class="fab fa fab fa-github fa-lg"></span>
+    <span class="fab fa-github fa-lg"></span>
      
   </a>
 </li>
@@ -129,24 +129,22 @@ <h1>Sunburst Using 'd2b'</h1>
     </div>
 
     <div class="ref-description">
-    
     <p>Create interactive sunburst chart with the 'd2b' charting library.</p>
-    
     </div>
 
-    <pre class="usage"><span class='fu'>sund2b</span>(
-  <span class='kw'>data</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
-  <span class='kw'>colors</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
-  <span class='kw'>valueField</span> <span class='kw'>=</span> <span class='st'>"size"</span>,
-  <span class='kw'>tooltip</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
-  <span class='kw'>breadcrumbs</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
-  <span class='kw'>rootLabel</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
-  <span class='kw'>showLabels</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>,
-  <span class='kw'>width</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
-  <span class='kw'>height</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
-  <span class='kw'>elementId</span> <span class='kw'>=</span> <span class='kw'>NULL</span>
-)</pre>
-    
+    <pre class="usage"><span class='fu'>sund2b</span><span class='op'>(</span>
+  data <span class='op'>=</span> <span class='cn'>NULL</span>,
+  colors <span class='op'>=</span> <span class='cn'>NULL</span>,
+  valueField <span class='op'>=</span> <span class='st'>"size"</span>,
+  tooltip <span class='op'>=</span> <span class='cn'>NULL</span>,
+  breadcrumbs <span class='op'>=</span> <span class='cn'>NULL</span>,
+  rootLabel <span class='op'>=</span> <span class='cn'>NULL</span>,
+  showLabels <span class='op'>=</span> <span class='cn'>FALSE</span>,
+  width <span class='op'>=</span> <span class='cn'>NULL</span>,
+  height <span class='op'>=</span> <span class='cn'>NULL</span>,
+  elementId <span class='op'>=</span> <span class='cn'>NULL</span>
+<span class='op'>)</span></pre>
+
     <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arguments</h2>
     <table class="ref-arguments">
     <colgroup><col class="name" /><col class="desc" /></colgroup>
@@ -198,75 +196,76 @@ <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arg
       <td><p>string id as a valid <code>CSS</code> element id.</p></td>
     </tr>
     </table>
-    
+
 
     <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
-    <pre class="examples"><div class='input'><span class='kw'>if</span>(<span class='fu'><a href='https://rdrr.io/r/base/interactive.html'>interactive</a></span>()){
+    <pre class="examples"><div class='input'><span class='kw'>if</span><span class='op'>(</span><span class='fu'><a href='https://rdrr.io/r/base/interactive.html'>interactive</a></span><span class='op'>(</span><span class='op'>)</span><span class='op'>)</span><span class='op'>{</span>
 
   <span class='co'># The sund2b() API mirrors sunburst() with fewer arguments.</span>
 
-  <span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>sunburstR</span>)
+  <span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'><a href='https://github.com/timelyportfolio/sunburstR'>sunburstR</a></span><span class='op'>)</span>
 
   <span class='co'># use a sample of the sequences csv data</span>
-  <span class='no'>sequences</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span>(
-    <span class='fu'><a href='https://rdrr.io/r/base/system.file.html'>system.file</a></span>(<span class='st'>"examples/visit-sequences.csv"</span>,<span class='kw'>package</span><span class='kw'>=</span><span class='st'>"sunburstR"</span>)
-    ,<span class='kw'>header</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-    ,<span class='kw'>stringsAsFactors</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-  )[<span class='fl'>1</span>:<span class='fl'>200</span>,]
+  <span class='va'>sequences</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span><span class='op'>(</span>
+    <span class='fu'><a href='https://rdrr.io/r/base/system.file.html'>system.file</a></span><span class='op'>(</span><span class='st'>"examples/visit-sequences.csv"</span>,package<span class='op'>=</span><span class='st'>"sunburstR"</span><span class='op'>)</span>
+    ,header <span class='op'>=</span> <span class='cn'>FALSE</span>
+    ,stringsAsFactors <span class='op'>=</span> <span class='cn'>FALSE</span>
+  <span class='op'>)</span><span class='op'>[</span><span class='fl'>1</span><span class='op'>:</span><span class='fl'>200</span>,<span class='op'>]</span>
 
   <span class='co'># create a d2b sunburst</span>
-  <span class='fu'>sund2b</span>(<span class='no'>sequences</span>)
+  <span class='fu'>sund2b</span><span class='op'>(</span><span class='va'>sequences</span><span class='op'>)</span>
 
   <span class='co'># show labels</span>
-  <span class='fu'>sund2b</span>(<span class='no'>sequences</span>, <span class='kw'>showLabels</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>)
+  <span class='fu'>sund2b</span><span class='op'>(</span><span class='va'>sequences</span>, showLabels <span class='op'>=</span> <span class='cn'>TRUE</span><span class='op'>)</span>
 
   <span class='co'># change the colors</span>
   <span class='co'>#   using d3.js categorical color scheme</span>
-  <span class='fu'>sund2b</span>(
-    <span class='no'>sequences</span>,
-    <span class='kw'>colors</span> <span class='kw'>=</span> <span class='kw pkg'>htmlwidgets</span><span class='kw ns'>::</span><span class='fu'><a href='https://rdrr.io/pkg/htmlwidgets/man/JS.html'>JS</a></span>(<span class='st'>"d3.scaleOrdinal(d3.schemeCategory20b)"</span>)
-  )
-}
+  <span class='fu'>sund2b</span><span class='op'>(</span>
+    <span class='va'>sequences</span>,
+    colors <span class='op'>=</span> <span class='fu'>htmlwidgets</span><span class='fu'>::</span><span class='fu'><a href='https://rdrr.io/pkg/htmlwidgets/man/JS.html'>JS</a></span><span class='op'>(</span><span class='st'>"d3.scaleOrdinal(d3.schemeCategory20b)"</span><span class='op'>)</span>
+  <span class='op'>)</span>
+<span class='op'>}</span>
 
-<span class='kw'>if</span> (<span class='fl'>FALSE</span>) {
+<span class='kw'>if</span> <span class='op'>(</span><span class='cn'>FALSE</span><span class='op'>)</span> <span class='op'>{</span>
 <span class='co'>#  using RColorBrewer palette</span>
-<span class='fu'>sund2b</span>(
-  <span class='no'>sequences</span>,
-  <span class='kw'>colors</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/list.html'>list</a></span>(<span class='kw'>range</span> <span class='kw'>=</span> <span class='kw pkg'>RColorBrewer</span><span class='kw ns'>::</span><span class='fu'><a href='https://rdrr.io/pkg/RColorBrewer/man/ColorBrewer.html'>brewer.pal</a></span>(<span class='fl'>9</span>, <span class='st'>"Set3"</span>))
-)
+<span class='fu'>sund2b</span><span class='op'>(</span>
+  <span class='va'>sequences</span>,
+  colors <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/list.html'>list</a></span><span class='op'>(</span>range <span class='op'>=</span> <span class='fu'>RColorBrewer</span><span class='fu'>::</span><span class='fu'><a href='https://rdrr.io/pkg/RColorBrewer/man/ColorBrewer.html'>brewer.pal</a></span><span class='op'>(</span><span class='fl'>9</span>, <span class='st'>"Set3"</span><span class='op'>)</span><span class='op'>)</span>
+<span class='op'>)</span>
 <span class='co'>#  using a color column from the R dataset</span>
 <span class='co'>#  treemap has an amazing treecolors ability</span>
-<span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>treemap</span>)
-<span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>d3r</span>)
-<span class='no'>rhd</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/pkg/treemap/man/random.hierarchical.data.html'>random.hierarchical.data</a></span>()
-<span class='no'>tm</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/pkg/treemap/man/treemap.html'>treemap</a></span>(
-  <span class='no'>rhd</span>,
-  <span class='kw'>index</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/paste.html'>paste0</a></span>(<span class='st'>"index"</span>, <span class='fl'>1</span>:<span class='fl'>3</span>),
-  <span class='kw'>vSize</span> <span class='kw'>=</span> <span class='st'>"x"</span>,
-  <span class='kw'>draw</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-)$<span class='no'>tm</span>
-<span class='fu'>sund2b</span>(
-  <span class='fu'><a href='https://rdrr.io/pkg/d3r/man/d3_nest.html'>d3_nest</a></span>(<span class='no'>tm</span>, <span class='kw'>value_cols</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/colnames.html'>colnames</a></span>(<span class='no'>tm</span>)[-(<span class='fl'>1</span>:<span class='fl'>3</span>)]),
-  <span class='kw'>colors</span> <span class='kw'>=</span> <span class='kw pkg'>htmlwidgets</span><span class='kw ns'>::</span><span class='fu'><a href='https://rdrr.io/pkg/htmlwidgets/man/JS.html'>JS</a></span>(
+<span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'>treemap</span><span class='op'>)</span>
+<span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'><a href='https://github.com/timelyportfolio/d3r'>d3r</a></span><span class='op'>)</span>
+<span class='va'>rhd</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/pkg/treemap/man/random.hierarchical.data.html'>random.hierarchical.data</a></span><span class='op'>(</span><span class='op'>)</span>
+<span class='va'>tm</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/pkg/treemap/man/treemap.html'>treemap</a></span><span class='op'>(</span>
+  <span class='va'>rhd</span>,
+  index <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/paste.html'>paste0</a></span><span class='op'>(</span><span class='st'>"index"</span>, <span class='fl'>1</span><span class='op'>:</span><span class='fl'>3</span><span class='op'>)</span>,
+  vSize <span class='op'>=</span> <span class='st'>"x"</span>,
+  draw <span class='op'>=</span> <span class='cn'>FALSE</span>
+<span class='op'>)</span><span class='op'>$</span><span class='va'>tm</span>
+<span class='fu'>sund2b</span><span class='op'>(</span>
+  <span class='fu'><a href='https://rdrr.io/pkg/d3r/man/d3_nest.html'>d3_nest</a></span><span class='op'>(</span><span class='va'>tm</span>, value_cols <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/colnames.html'>colnames</a></span><span class='op'>(</span><span class='va'>tm</span><span class='op'>)</span><span class='op'>[</span><span class='op'>-</span><span class='op'>(</span><span class='fl'>1</span><span class='op'>:</span><span class='fl'>3</span><span class='op'>)</span><span class='op'>]</span><span class='op'>)</span>,
+  colors <span class='op'>=</span> <span class='fu'>htmlwidgets</span><span class='fu'>::</span><span class='fu'><a href='https://rdrr.io/pkg/htmlwidgets/man/JS.html'>JS</a></span><span class='op'>(</span>
     <span class='co'># yes this is a little different, so please pay attention</span>
     <span class='co'>#  "function(d) {return d.color}" will not work</span>
     <span class='st'>"function(name, d){return d.color || '#ccc';}"</span>
-  ),
-  <span class='kw'>valueField</span> <span class='kw'>=</span> <span class='st'>"vSize"</span>
-)
+  <span class='op'>)</span>,
+  valueField <span class='op'>=</span> <span class='st'>"vSize"</span>
+<span class='op'>)</span>
 
 
 <span class='co'># use sund2b in Shiny</span>
-<span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>shiny</span>)
-<span class='no'>ui</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='d2b-shiny.html'>sund2bOutput</a></span>(<span class='st'>"sun"</span>)
-<span class='no'>server</span> <span class='kw'>&lt;-</span> <span class='kw'>function</span>(<span class='no'>input</span>, <span class='no'>output</span>, <span class='no'>session</span>) {
-  <span class='no'>output</span>$<span class='no'>sun</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='d2b-shiny.html'>renderSund2b</a></span>({
-    <span class='fu'>sund2b</span>(<span class='no'>sequences</span>)
-  })
-}
-<span class='fu'><a href='https://rdrr.io/pkg/shiny/man/shinyApp.html'>shinyApp</a></span>(<span class='no'>ui</span>, <span class='no'>server</span>)
-
-}</div></pre>
+<span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'><a href='https://shiny.rstudio.com/'>shiny</a></span><span class='op'>)</span>
+<span class='va'>ui</span> <span class='op'>&lt;-</span> <span class='fu'><a href='d2b-shiny.html'>sund2bOutput</a></span><span class='op'>(</span><span class='st'>"sun"</span><span class='op'>)</span>
+<span class='va'>server</span> <span class='op'>&lt;-</span> <span class='kw'>function</span><span class='op'>(</span><span class='va'>input</span>, <span class='va'>output</span>, <span class='va'>session</span><span class='op'>)</span> <span class='op'>{</span>
+  <span class='va'>output</span><span class='op'>$</span><span class='va'>sun</span> <span class='op'>&lt;-</span> <span class='fu'><a href='d2b-shiny.html'>renderSund2b</a></span><span class='op'>(</span><span class='op'>{</span>
+    <span class='fu'>sund2b</span><span class='op'>(</span><span class='va'>sequences</span><span class='op'>)</span>
+  <span class='op'>}</span><span class='op'>)</span>
+<span class='op'>}</span>
+<span class='fu'><a href='https://rdrr.io/pkg/shiny/man/shinyApp.html'>shinyApp</a></span><span class='op'>(</span><span class='va'>ui</span>, <span class='va'>server</span><span class='op'>)</span>
+
+<span class='op'>}</span>
+</div></pre>
   </div>
   <div class="col-md-3 hidden-xs hidden-sm" id="pkgdown-sidebar">
     <nav id="toc" data-toggle="toc" class="sticky-top">
@@ -282,7 +281,7 @@ <h2 data-toc-skip>Contents</h2>
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.5.1.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.6.1.</p>
 </div>
 
       </footer>
diff --git a/docs/reference/sund2bBreadcrumb.html b/docs/reference/sund2bBreadcrumb.html
index a827407..319ba67 100644
--- a/docs/reference/sund2bBreadcrumb.html
+++ b/docs/reference/sund2bBreadcrumb.html
@@ -8,11 +8,13 @@
 
 <title>Advanced Customization of 'd2b' Breadcrumb — sund2bBreadcrumb • sunburstR</title>
 
+
 <!-- jquery -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous" />
+
 <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script>
 
 <!-- bootstrap-toc -->
@@ -36,14 +38,13 @@
 
 
 
-<meta property="og:title" content="Advanced Customization of 'd2b' Breadcrumb — sund2bBreadcrumb" />
 
+<meta property="og:title" content="Advanced Customization of 'd2b' Breadcrumb — sund2bBreadcrumb" />
 <meta property="og:description" content="Advanced Customization of 'd2b' Breadcrumb" />
 
 
 
 
-
 <!-- mathjax -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
@@ -71,7 +72,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">sunburstR</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.4</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.6</span>
       </span>
     </div>
 
@@ -79,7 +80,7 @@
       <ul class="nav navbar-nav">
         <li>
   <a href="../index.html">
-    <span class="fas fa fas fa-home fa-lg"></span>
+    <span class="fas fa-home fa-lg"></span>
      
   </a>
 </li>
@@ -102,11 +103,10 @@
   <a href="../news/index.html">Changelog</a>
 </li>
       </ul>
-      
       <ul class="nav navbar-nav navbar-right">
         <li>
   <a href="https://github.com/timelyportfolio/sunburstR/">
-    <span class="fab fa fab fa-github fa-lg"></span>
+    <span class="fab fa-github fa-lg"></span>
      
   </a>
 </li>
@@ -129,13 +129,11 @@ <h1>Advanced Customization of 'd2b' Breadcrumb</h1>
     </div>
 
     <div class="ref-description">
-    
     <p>Advanced Customization of 'd2b' Breadcrumb</p>
-    
     </div>
 
-    <pre class="usage"><span class='fu'>sund2bBreadcrumb</span>(<span class='kw'>enabled</span> <span class='kw'>=</span> <span class='kw'>NULL</span>, <span class='kw'>html</span> <span class='kw'>=</span> <span class='kw'>NULL</span>, <span class='kw'>orient</span> <span class='kw'>=</span> <span class='kw'>NULL</span>)</pre>
-    
+    <pre class="usage"><span class='fu'>sund2bBreadcrumb</span><span class='op'>(</span>enabled <span class='op'>=</span> <span class='cn'>NULL</span>, html <span class='op'>=</span> <span class='cn'>NULL</span>, orient <span class='op'>=</span> <span class='cn'>NULL</span><span class='op'>)</span></pre>
+
     <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arguments</h2>
     <table class="ref-arguments">
     <colgroup><col class="name" /><col class="desc" /></colgroup>
@@ -156,46 +154,46 @@ <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arg
 to control the orientation of the breadcrumb relative to the chart.</p></td>
     </tr>
     </table>
-    
+
     <h2 class="hasAnchor" id="value"><a class="anchor" href="#value"></a>Value</h2>
 
     <p><code>list</code></p>
-    
 
     <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
-    <pre class="examples"><div class='input'><span class='kw'>if</span>(<span class='fu'><a href='https://rdrr.io/r/base/interactive.html'>interactive</a></span>()){
+    <pre class="examples"><div class='input'><span class='kw'>if</span><span class='op'>(</span><span class='fu'><a href='https://rdrr.io/r/base/interactive.html'>interactive</a></span><span class='op'>(</span><span class='op'>)</span><span class='op'>)</span><span class='op'>{</span>
 
-<span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>sunburstR</span>)
+<span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'><a href='https://github.com/timelyportfolio/sunburstR'>sunburstR</a></span><span class='op'>)</span>
 
 <span class='co'># use a sample of the sequences csv data</span>
-<span class='no'>sequences</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span>(
-  <span class='fu'><a href='https://rdrr.io/r/base/system.file.html'>system.file</a></span>(<span class='st'>"examples/visit-sequences.csv"</span>,<span class='kw'>package</span><span class='kw'>=</span><span class='st'>"sunburstR"</span>)
-  ,<span class='kw'>header</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-  ,<span class='kw'>stringsAsFactors</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-)[<span class='fl'>1</span>:<span class='fl'>200</span>,]
+<span class='va'>sequences</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span><span class='op'>(</span>
+  <span class='fu'><a href='https://rdrr.io/r/base/system.file.html'>system.file</a></span><span class='op'>(</span><span class='st'>"examples/visit-sequences.csv"</span>,package<span class='op'>=</span><span class='st'>"sunburstR"</span><span class='op'>)</span>
+  ,header <span class='op'>=</span> <span class='cn'>FALSE</span>
+  ,stringsAsFactors <span class='op'>=</span> <span class='cn'>FALSE</span>
+<span class='op'>)</span><span class='op'>[</span><span class='fl'>1</span><span class='op'>:</span><span class='fl'>200</span>,<span class='op'>]</span>
 
 <span class='co'># disable the breadcrumb</span>
-<span class='fu'><a href='sund2b.html'>sund2b</a></span>(
-  <span class='no'>sequences</span>,
-  <span class='kw'>breadcrumbs</span> <span class='kw'>=</span> <span class='fu'>sund2bBreadcrumb</span>(
-    <span class='kw'>enabled</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-  )
-)
+<span class='fu'><a href='sund2b.html'>sund2b</a></span><span class='op'>(</span>
+  <span class='va'>sequences</span>,
+  breadcrumbs <span class='op'>=</span> <span class='fu'>sund2bBreadcrumb</span><span class='op'>(</span>
+    enabled <span class='op'>=</span> <span class='cn'>FALSE</span>
+  <span class='op'>)</span>
+<span class='op'>)</span>
 
 <span class='co'># change the breadcrumb content</span>
-<span class='fu'><a href='sund2b.html'>sund2b</a></span>(
-  <span class='no'>sequences</span>,
-  <span class='kw'>breadcrumbs</span> <span class='kw'>=</span> <span class='fu'>sund2bBreadcrumb</span>(
-    <span class='kw'>html</span> <span class='kw'>=</span> <span class='kw pkg'>htmlwidgets</span><span class='kw ns'>::</span><span class='fu'><a href='https://rdrr.io/pkg/htmlwidgets/man/JS.html'>JS</a></span>(<span class='st'>"
+<span class='fu'><a href='sund2b.html'>sund2b</a></span><span class='op'>(</span>
+  <span class='va'>sequences</span>,
+  breadcrumbs <span class='op'>=</span> <span class='fu'>sund2bBreadcrumb</span><span class='op'>(</span>
+    html <span class='op'>=</span> <span class='fu'>htmlwidgets</span><span class='fu'>::</span><span class='fu'><a href='https://rdrr.io/pkg/htmlwidgets/man/JS.html'>JS</a></span><span class='op'>(</span><span class='st'>"
 function(nodedata, size, percent) {
   return '&lt;span style=\"font-weight: bold;\"&gt;' + nodedata.name + '&lt;/span&gt;' + ' ' + size
 }
-    "</span>)
-  )
-)
+    "</span><span class='op'>)</span>
+  <span class='op'>)</span>
+<span class='op'>)</span>
 
 
-}</div></pre>
+<span class='op'>}</span>
+</div></pre>
   </div>
   <div class="col-md-3 hidden-xs hidden-sm" id="pkgdown-sidebar">
     <nav id="toc" data-toggle="toc" class="sticky-top">
@@ -211,7 +209,7 @@ <h2 data-toc-skip>Contents</h2>
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.5.1.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.6.1.</p>
 </div>
 
       </footer>
diff --git a/docs/reference/sund2bTooltip.html b/docs/reference/sund2bTooltip.html
index feed771..242c22d 100644
--- a/docs/reference/sund2bTooltip.html
+++ b/docs/reference/sund2bTooltip.html
@@ -8,11 +8,13 @@
 
 <title>Advanced Customization of 'd2b' Tooltip — sund2bTooltip • sunburstR</title>
 
+
 <!-- jquery -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
 <!-- Bootstrap -->
 
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous" />
+
 <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script>
 
 <!-- bootstrap-toc -->
@@ -36,14 +38,13 @@
 
 
 
-<meta property="og:title" content="Advanced Customization of 'd2b' Tooltip — sund2bTooltip" />
 
+<meta property="og:title" content="Advanced Customization of 'd2b' Tooltip — sund2bTooltip" />
 <meta property="og:description" content="Advanced Customization of 'd2b' Tooltip" />
 
 
 
 
-
 <!-- mathjax -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script>
@@ -71,7 +72,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">sunburstR</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.4</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">2.1.6</span>
       </span>
     </div>
 
@@ -79,7 +80,7 @@
       <ul class="nav navbar-nav">
         <li>
   <a href="../index.html">
-    <span class="fas fa fas fa-home fa-lg"></span>
+    <span class="fas fa-home fa-lg"></span>
      
   </a>
 </li>
@@ -102,11 +103,10 @@
   <a href="../news/index.html">Changelog</a>
 </li>
       </ul>
-      
       <ul class="nav navbar-nav navbar-right">
         <li>
   <a href="https://github.com/timelyportfolio/sunburstR/">
-    <span class="fab fa fab fa-github fa-lg"></span>
+    <span class="fab fa-github fa-lg"></span>
      
   </a>
 </li>
@@ -129,13 +129,11 @@ <h1>Advanced Customization of 'd2b' Tooltip</h1>
     </div>
 
     <div class="ref-description">
-    
     <p>Advanced Customization of 'd2b' Tooltip</p>
-    
     </div>
 
-    <pre class="usage"><span class='fu'>sund2bTooltip</span>(<span class='kw'>at</span> <span class='kw'>=</span> <span class='kw'>NULL</span>, <span class='kw'>followMouse</span> <span class='kw'>=</span> <span class='kw'>NULL</span>, <span class='kw'>html</span> <span class='kw'>=</span> <span class='kw'>NULL</span>, <span class='kw'>my</span> <span class='kw'>=</span> <span class='kw'>NULL</span>)</pre>
-    
+    <pre class="usage"><span class='fu'>sund2bTooltip</span><span class='op'>(</span>at <span class='op'>=</span> <span class='cn'>NULL</span>, followMouse <span class='op'>=</span> <span class='cn'>NULL</span>, html <span class='op'>=</span> <span class='cn'>NULL</span>, my <span class='op'>=</span> <span class='cn'>NULL</span><span class='op'>)</span></pre>
+
     <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arguments</h2>
     <table class="ref-arguments">
     <colgroup><col class="name" /><col class="desc" /></colgroup>
@@ -165,38 +163,38 @@ <h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arg
 to control the orientation of the tooltip.</p></td>
     </tr>
     </table>
-    
+
     <h2 class="hasAnchor" id="value"><a class="anchor" href="#value"></a>Value</h2>
 
     <p><code>list</code></p>
-    
 
     <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
-    <pre class="examples"><div class='input'><span class='kw'>if</span>(<span class='fu'><a href='https://rdrr.io/r/base/interactive.html'>interactive</a></span>()){
+    <pre class="examples"><div class='input'><span class='kw'>if</span><span class='op'>(</span><span class='fu'><a href='https://rdrr.io/r/base/interactive.html'>interactive</a></span><span class='op'>(</span><span class='op'>)</span><span class='op'>)</span><span class='op'>{</span>
 
-<span class='fu'><a href='https://rdrr.io/r/base/library.html'>library</a></span>(<span class='no'>sunburstR</span>)
+<span class='kw'><a href='https://rdrr.io/r/base/library.html'>library</a></span><span class='op'>(</span><span class='va'><a href='https://github.com/timelyportfolio/sunburstR'>sunburstR</a></span><span class='op'>)</span>
 
 <span class='co'># use a sample of the sequences csv data</span>
-<span class='no'>sequences</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span>(
-  <span class='fu'><a href='https://rdrr.io/r/base/system.file.html'>system.file</a></span>(<span class='st'>"examples/visit-sequences.csv"</span>,<span class='kw'>package</span><span class='kw'>=</span><span class='st'>"sunburstR"</span>)
-  ,<span class='kw'>header</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-  ,<span class='kw'>stringsAsFactors</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>
-)[<span class='fl'>1</span>:<span class='fl'>200</span>,]
+<span class='va'>sequences</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/utils/read.table.html'>read.csv</a></span><span class='op'>(</span>
+  <span class='fu'><a href='https://rdrr.io/r/base/system.file.html'>system.file</a></span><span class='op'>(</span><span class='st'>"examples/visit-sequences.csv"</span>,package<span class='op'>=</span><span class='st'>"sunburstR"</span><span class='op'>)</span>
+  ,header <span class='op'>=</span> <span class='cn'>FALSE</span>
+  ,stringsAsFactors <span class='op'>=</span> <span class='cn'>FALSE</span>
+<span class='op'>)</span><span class='op'>[</span><span class='fl'>1</span><span class='op'>:</span><span class='fl'>200</span>,<span class='op'>]</span>
 
 <span class='co'># change the tooltip</span>
-<span class='fu'><a href='sund2b.html'>sund2b</a></span>(
-  <span class='no'>sequences</span>,
-  <span class='kw'>tooltip</span> <span class='kw'>=</span> <span class='fu'>sund2bTooltip</span>(
-    <span class='kw'>html</span> <span class='kw'>=</span> <span class='kw pkg'>htmlwidgets</span><span class='kw ns'>::</span><span class='fu'><a href='https://rdrr.io/pkg/htmlwidgets/man/JS.html'>JS</a></span>(<span class='st'>"
+<span class='fu'><a href='sund2b.html'>sund2b</a></span><span class='op'>(</span>
+  <span class='va'>sequences</span>,
+  tooltip <span class='op'>=</span> <span class='fu'>sund2bTooltip</span><span class='op'>(</span>
+    html <span class='op'>=</span> <span class='fu'>htmlwidgets</span><span class='fu'>::</span><span class='fu'><a href='https://rdrr.io/pkg/htmlwidgets/man/JS.html'>JS</a></span><span class='op'>(</span><span class='st'>"
 function(nodedata, size, percent) {
   return '&lt;span style=\"font-weight: bold;\"&gt;' + nodedata.name + '&lt;/span&gt;' + ' ' + size
 }
-    "</span>)
-  )
-)
+    "</span><span class='op'>)</span>
+  <span class='op'>)</span>
+<span class='op'>)</span>
 
 
-}</div></pre>
+<span class='op'>}</span>
+</div></pre>
   </div>
   <div class="col-md-3 hidden-xs hidden-sm" id="pkgdown-sidebar">
     <nav id="toc" data-toggle="toc" class="sticky-top">
@@ -212,7 +210,7 @@ <h2 data-toc-skip>Contents</h2>
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.5.1.</p>
+  <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.6.1.</p>
 </div>
 
       </footer>