/* ------------------------------------------------------------------------------ * * # D3.js - basic chord diagram * * Demo chord diagram setup with mouseover interaction * * Version: 1.0 * Latest update: August 1, 2015 * * ---------------------------------------------------------------------------- */ $(function () { // Basic setup // ------------------------------ // Data set var data = [ [6,32,47,81,31,89,24,68,50,39], [37,83,57,80,87,7,85,7,68,17], [50,15,31,3,1,85,36,95,83,99], [37,25,37,81,72,98,32,13,70,25], [19,99,97,79,74,43,78,18,4,57], [77,2,87,41,93,52,6,42,11,76], [44,54,60,69,36,44,76,58,50,16] ]; // Construct layout // ------------------------------ d3.chart = d3.chart || {}; d3.chart.chord = function(container) { var self = {}; // Main variables var w = 400, h = 400, r0 = Math.min(w, h) * .37, r1 = r0 * 1.1; // Colors var fill = d3.scale.category20c(); // Add chord layout var chord = d3.layout.chord() .padding(.05) .sortSubgroups(d3.descending) // Update chart self.update = function(data) { chord.matrix(data); self.render(); }; // Clear chart self.clear = function() { d3.select(container).selectAll('svg').remove(); }; // Render chart self.render = function() { self.clear(); // Create chart var svg = d3.select(container) .append("svg") .attr("width", w) .attr("height", h) .append("g") .attr("transform", "translate(" + w / 2 + "," + h / 2 + ")"); // Bind data and add chord path svg.append("g") .selectAll(".chord-path") .data(chord.groups) .enter() .append("path") .attr("class", "chord-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(.1, svg)) .on("mouseout", fade(1, svg)); // Add ticks // ------------------------------ // Group 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)"; }); // Add tick lines ticks.append("line") .attr("x1", 1) .attr("y1", 0) .attr("x2", 5) .attr("y2", 0) .style("stroke", "#000"); // Add tick text 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; }) .style("font-size", 12) .text(function(d) { return d.label; }); // Add chord // ------------------------------ svg.append("g") .attr("class", "d3-chord") .selectAll("path") .data(chord.chords) .enter() .append("path") .style("fill", function(d) { return fill(d.target.index); }) .style("stroke", "#000") .style("stroke-width", 0.5) .style("fill-opacity", 0.7) .attr("d", d3.svg.chord().radius(r0)) .style("opacity", 1); }; return self; }; // Utility functions // ------------------------------ // 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, 50).map(function(v, i) { return { angle: v * k + d.startAngle, label: i % 2 ? null : v }; }); } // Returns an event handler for fading a given chord group function fade(opacity, svg) { return function(g, i) { svg.selectAll(".d3-chord path").filter(function(d) { return d.source.index != i && d.target.index != i; }) .transition() .style("opacity", opacity); }; } // Initialize chart // ------------------------------ initChord(); function initChord() { var chord = d3.chart.chord("#d3-chord-basic"); chord.update(data); d3.select("#clear-basic").on("click", function() { chord.clear(); }); d3.select("#render-basic").on("click", function() { chord.render(); }); } });