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@base698 base698/chord.html
Last active Feb 17, 2017

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Sample chord diagram. Look at L235 to change the data.
<html>
<script>
// CSV file for link visits
// if there are 3 links here , then the data for the matrix is 3x3 for the links.
var uris = "link,visits,color\n" +
"/discover,1000,#E41A1C\n" +
"/tv,800,#FFFF33\n" +
"/channels,150,#FF7F00\n";
// Visitors from one page to another, eg this says 4 visitors went /discover -> /tv
var matrix = [[0,4,1], // links for /discover
[1,0,3], // links for /tv
[3,2,0]];// links for /channels
</script>
<style>
@import url(http://fonts.googleapis.com/css?family=PT+Serif|PT+Serif:b|PT+Serif:i|PT+Sans|PT+Sans:b);
html {
min-width: 1040px;
}
.ocks-org body {
background: #fcfcfa;
color: #333;
font-family: "PT Serif", serif;
margin: 1em auto 4em auto;
position: relative;
width: 960px;
}
.ocks-org header,
.ocks-org footer,
.ocks-org aside,
.ocks-org h1,
.ocks-org h2,
.ocks-org h3,
.ocks-org h4 {
font-family: "PT Sans", sans-serif;
}
.ocks-org h1,
.ocks-org h2,
.ocks-org h3,
.ocks-org h4 {
color: #000;
}
.ocks-org header,
.ocks-org footer {
color: #636363;
}
h1 {
font-size: 64px;
font-weight: 300;
letter-spacing: -2px;
margin: .3em 0 .1em 0;
}
h2 {
margin-top: 2em;
}
h1, h2 {
text-rendering: optimizeLegibility;
}
h2 a[name],
h2 a[id] {
color: #ccc;
right: 100%;
padding: 0 .3em;
position: absolute;
}
header,
footer {
font-size: small;
}
.ocks-org header aside,
.ocks-org footer aside {
float: left;
margin-right: .5em;
}
.ocks-org header aside:after,
.ocks-org footer aside:after {
padding-left: .5em;
content: "/";
}
footer {
margin-top: 8em;
}
h1 ~ aside {
font-size: small;
right: 0;
position: absolute;
width: 180px;
}
.attribution {
font-size: small;
margin-bottom: 2em;
}
body > p, li > p {
line-height: 1.5em;
}
body > p {
width: 720px;
}
body > blockquote {
width: 640px;
}
blockquote q {
display: block;
font-style: oblique;
}
ul {
padding: 0;
}
li {
width: 690px;
margin-left: 30px;
}
a {
color: steelblue;
}
a:not(:hover) {
text-decoration: none;
}
pre, code, textarea {
font-family: "Menlo", monospace;
}
code {
line-height: 1em;
}
textarea {
font-size: 100%;
}
body > pre {
border-left: solid 2px #ccc;
padding-left: 18px;
margin: 2em 0 2em -20px;
}
.html .value,
.javascript .string,
.javascript .regexp {
color: #756bb1;
}
.html .tag,
.css .tag,
.javascript .keyword {
color: #3182bd;
}
.comment {
color: #636363;
}
.html .doctype,
.javascript .number {
color: #31a354;
}
.html .attribute,
.css .attribute,
.javascript .class,
.javascript .special {
color: #e6550d;
}
svg {
font: 10px sans-serif;
}
.axis path, .axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
sup, sub {
line-height: 0;
}
q:before {
content: "";
}
q:after {
content: "";
}
blockquote q {
line-height: 1.5em;
display: inline;
}
blockquote q:before,
blockquote q:after {
content: "";
}
#circle circle {
fill: none;
pointer-events: all;
}
.group path {
fill-opacity: .5;
}
path.chord {
stroke: #000;
stroke-width: .25px;
}
#circle:hover path.fade {
display: none;
}
</style>
<body></body>
<script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script src="https://d3js.org/queue.v1.min.js"></script>
<script>
var width = 720,
height = 720,
outerRadius = Math.min(width, height) / 2 - 10,
innerRadius = outerRadius - 24;
var formatPercent = d3.format(".1%");
var arc = d3.svg.arc()
.innerRadius(innerRadius)
.outerRadius(outerRadius);
var layout = d3.layout.chord()
.padding(.04)
.sortSubgroups(d3.descending)
.sortChords(d3.ascending);
var path = d3.svg.chord()
.radius(innerRadius);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("id", "circle")
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");
svg.append("circle")
.attr("r", outerRadius);
ready(null, d3.csv.parse(uris), matrix);
function ready(error, uris, matrix) {
if (error) throw error;
// Compute the chord layout.
layout.matrix(matrix);
// Add a group per neighborhood.
var group = svg.selectAll(".group")
.data(layout.groups)
.enter().append("g")
.attr("class", "group")
.on("mouseover", mouseover);
// Add a mouseover title.
group.append("title").text(function(d, i) {
return uris[i].link + ": " + d.value + " visits";
});
// Add the group arc.
var groupPath = group.append("path")
.attr("id", function(d, i) { return "group" + i; })
.attr("d", arc)
.style("fill", function(d, i) { return uris[i].color; });
// Add a text label.
var groupText = group.append("text")
.attr("x", 6)
.attr("dy", 15);
groupText.append("textPath")
.attr("xlink:href", function(d, i) { return "#group" + i; })
.text(function(d, i) { return uris[i].link; });
// Remove the labels that don't fit. :(
groupText.filter(function(d, i) { return groupPath[0][i].getTotalLength() / 2 - 16 < this.getComputedTextLength(); })
.remove();
// Add the chords.
var chord = svg.selectAll(".chord")
.data(layout.chords)
.enter().append("path")
.attr("class", "chord")
.style("fill", function(d) { return uris[d.source.index].color; })
.attr("d", path);
// Add an elaborate mouseover title for each chord.
chord.append("title").text(function(d) {
return uris[d.source.index].link
+ "" + uris[d.target.index].link
+ ": " + d.source.value
+ "\n" + uris[d.target.index].link
+ "" + uris[d.source.index].link
+ ": " + d.target.value;
});
function mouseover(d, i) {
chord.classed("fade", function(p) {
return p.source.index != i
&& p.target.index != i;
});
}
}
</script>
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