Attempt at a chord diagram of language translation
Created
May 3, 2017 13:02
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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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