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@j-funk

j-funk/Chord Prototype

Forked from mbostock/.block
Last active February 21, 2018 16:25
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  • Save j-funk/fe26b33c7e67338edb484c574acbd0ca to your computer and use it in GitHub Desktop.
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Download ZIP
Chord Diagram
Raw
README.md
Raw
Chord Prototype
license: gpl-3.0
height: 960
border: no
Raw
index.html
<!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>
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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) {
console.log('chord matrix');
console.log(chord(matrix));
console.log('chords');
console.log(chords);
console.log('chord groups');
console.log(chords.groups);
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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