Chord diagrams show directed relationships among a group of entities. This example also demonstrates simple interactivity by using mouseover filtering. Layout inspired by Martin Krzywinski's beautiful work on Circos.
-
-
Save renecnielsen/9903845 to your computer and use it in GitHub Desktop.
Chord diagram
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| font: 10px sans-serif; | |
| } | |
| .chord path { | |
| fill-opacity: .67; | |
| stroke: #000; | |
| stroke-width: .5px; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| // From http://mkweb.bcgsc.ca/circos/guide/tables/ | |
| var matrix = [ | |
| [11975, 5871, 8916, 2868], | |
| [ 1951, 10048, 2060, 6171], | |
| [ 8010, 16145, 8090, 8045], | |
| [ 1013, 990, 940, 6907] | |
| ]; | |
| var chord = d3.layout.chord() | |
| .padding(.05) | |
| .sortSubgroups(d3.descending) | |
| .matrix(matrix); | |
| var width = 960, | |
| height = 500, | |
| innerRadius = Math.min(width, height) * .41, | |
| outerRadius = innerRadius * 1.1; | |
| var fill = d3.scale.ordinal() | |
| .domain(d3.range(4)) | |
| .range(["#00aeef", "#e1f4fd", "#000000", "#96999b", "#5d6263", "#e1d8ad", "#cf5c42", "#00447c", "#f4d5e3"]); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .append("g") | |
| .attr("transform", "translate(" + width / 2 + "," + height / 2 + ")"); | |
| svg.append("g").selectAll("path") | |
| .data(chord.groups) | |
| .enter().append("path") | |
| .style("fill", function(d) { return fill(d.index); }) | |
| .style("stroke", function(d) { return fill(d.index); }) | |
| .attr("d", d3.svg.arc().innerRadius(innerRadius).outerRadius(outerRadius)) | |
| .on("mouseover", fade(.1)) | |
| .on("mouseout", fade(1)); | |
| var ticks = svg.append("g").selectAll("g") | |
| .data(chord.groups) | |
| .enter().append("g").selectAll("g") | |
| .data(groupTicks) | |
| .enter().append("g") | |
| .attr("transform", function(d) { | |
| return "rotate(" + (d.angle * 180 / Math.PI - 90) + ")" | |
| + "translate(" + outerRadius + ",0)"; | |
| }); | |
| ticks.append("line") | |
| .attr("x1", 1) | |
| .attr("y1", 0) | |
| .attr("x2", 5) | |
| .attr("y2", 0) | |
| .style("stroke", "#000"); | |
| ticks.append("text") | |
| .attr("x", 8) | |
| .attr("dy", ".35em") | |
| .attr("transform", function(d) { return d.angle > Math.PI ? "rotate(180)translate(-16)" : null; }) | |
| .style("text-anchor", function(d) { return d.angle > Math.PI ? "end" : null; }) | |
| .text(function(d) { return d.label; }); | |
| svg.append("g") | |
| .attr("class", "chord") | |
| .selectAll("path") | |
| .data(chord.chords) | |
| .enter().append("path") | |
| .attr("d", d3.svg.chord().radius(innerRadius)) | |
| .style("fill", function(d) { return fill(d.target.index); }) | |
| .style("opacity", 1); | |
| // Returns an array of tick angles and labels, given a group. | |
| function groupTicks(d) { | |
| var k = (d.endAngle - d.startAngle) / d.value; | |
| return d3.range(0, d.value, 1000).map(function(v, i) { | |
| return { | |
| angle: v * k + d.startAngle, | |
| label: i % 5 ? null : v / 1000 + "k" | |
| }; | |
| }); | |
| } | |
| // Returns an event handler for fading a given chord group. | |
| function fade(opacity) { | |
| return function(g, i) { | |
| svg.selectAll(".chord path") | |
| .filter(function(d) { return d.source.index != i && d.target.index != i; }) | |
| .transition() | |
| .style("opacity", opacity); | |
| }; | |
| } | |
| </script> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment