Chord diagrams show directed relationships among a group of entities. Layout inspired by Martin Krzywinski's beautiful work on Circos.
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Chord Diagram
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| license: gpl-3.0 | |
| height: 960 | |
| border: no |
This file contains hidden or 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.
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| font: 10px sans-serif; | |
| } | |
| .group-tick line { | |
| stroke: #000; | |
| } | |
| .ribbons { | |
| fill-opacity: 0.67; | |
| } | |
| </style> | |
| <svg width="960" height="960"></svg> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script> | |
| var matrix = [ | |
| [11975, 5871, 8916, 2868], | |
| [ 1951, 10048, 2060, 6171], | |
| [ 8010, 16145, 8090, 8045], | |
| [ 1013, 990, 940, 6907] | |
| ]; | |
| var svg = d3.select("svg"), | |
| width = +svg.attr("width"), | |
| height = +svg.attr("height"), | |
| outerRadius = Math.min(width, height) * 0.5 - 40, | |
| innerRadius = outerRadius - 30; | |
| var formatValue = d3.formatPrefix(",.0", 1e3); | |
| var chord = d3.chord() | |
| .padAngle(0.05) | |
| .sortSubgroups(d3.descending); | |
| var arc = d3.arc() | |
| .innerRadius(innerRadius) | |
| .outerRadius(outerRadius); | |
| var ribbon = d3.ribbon() | |
| .radius(innerRadius); | |
| var color = d3.scaleOrdinal() | |
| .domain(d3.range(4)) | |
| .range(["#000000", "#FFDD89", "#957244", "#F26223"]); | |
| var g = svg.append("g") | |
| .attr("transform", "translate(" + width / 2 + "," + height / 2 + ")") | |
| .datum(chord(matrix)); | |
| var group = g.append("g") | |
| .attr("class", "groups") | |
| .selectAll("g") | |
| .data(function(chords) { return chords.groups; }) | |
| .enter().append("g"); | |
| group.append("path") | |
| .style("fill", function(d) { return color(d.index); }) | |
| .style("stroke", function(d) { return d3.rgb(color(d.index)).darker(); }) | |
| .attr("d", arc); | |
| var groupTick = group.selectAll(".group-tick") | |
| .data(function(d) { return groupTicks(d, 1e3); }) | |
| .enter().append("g") | |
| .attr("class", "group-tick") | |
| .attr("transform", function(d) { return "rotate(" + (d.angle * 180 / Math.PI - 90) + ") translate(" + outerRadius + ",0)"; }); | |
| groupTick.append("line") | |
| .attr("x2", 6); | |
| groupTick | |
| .filter(function(d) { return d.value % 5e3 === 0; }) | |
| .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 formatValue(d.value); }); | |
| g.append("g") | |
| .attr("class", "ribbons") | |
| .selectAll("path") | |
| .data(function(chords) { return chords; }) | |
| .enter().append("path") | |
| .attr("d", ribbon) | |
| .style("fill", function(d) { return color(d.target.index); }) | |
| .style("stroke", function(d) { return d3.rgb(color(d.target.index)).darker(); }); | |
| // Returns an array of tick angles and values for a given group and step. | |
| function groupTicks(d, step) { | |
| var k = (d.endAngle - d.startAngle) / d.value; | |
| return d3.range(0, d.value, step).map(function(value) { | |
| return {value: value, angle: value * k + d.startAngle}; | |
| }); | |
| } | |
| </script> |
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