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@pbadenski
Created August 6, 2012 19:10
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created by livecoding - http://livecoding.gabrielflor.it
// from http://mbostock.github.com/d3/ex/chord.html
var chord = d3.layout.chord()
.padding(0.05)
.sortSubgroups(d3.descending)
.matrix([
[11975, 5871, 8916, 2868],
[ 1951, 10048, 2060, 6171],
[ 8010, 16145, 8090, 8045],
[ 1013, 990, 940, 6907]
]);
var w = $('svg#livecoding').width(),
h = $('svg#livecoding').height(),
r0 = Math.min(w, h) * 0.41,
r1 = r0 * 1.1;
var fill = d3.scale.ordinal()
.domain(d3.range(4))
.range(["#CF6A4C", "#CDA869", "#8F9D6A", "#7587A6"]);
var svg = d3.select('svg#livecoding')
.append("g")
.attr("transform", "translate(" + w / 2 + "," + h / 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(r0).outerRadius(r1))
.on("mouseover", fade(0.1))
.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(" + r1 + ",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("text-anchor", function(d) {
return d.angle > Math.PI ? "end" : null;
})
.attr("transform", function(d) {
return d.angle > Math.PI ? "rotate(180)translate(-16)" : null;
})
.text(function(d) { return d.label; });
svg.append("g")
.attr("class", "chord")
.selectAll("path")
.data(chord.chords)
.enter().append("path")
.style("fill", function(d) { return fill(d.target.index); })
.attr("d", d3.svg.chord().radius(r0))
.style("opacity", 1);
$('.chord path').css('fill-opacity', 0.67);
$('.chord path').css('stroke', '#000');
$('.chord path').css('stroke-width', 0.5);
/** 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("g.chord path")
.filter(function(d) {
return d.source.index != i && d.target.index != i;
})
.transition()
.style("opacity", opacity);
};
}
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