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Interactive Streamgraph D3
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| # Editor backup files | |
| *.bak | |
| *~ |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Streamgraph</title> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.v2.js?2.8.0"></script> | |
| <script type="text/javascript" src="stream_layers.js"></script> | |
| <script type="text/javascript" src="stream-chart.js"></script> | |
| </head> | |
| <body> | |
| <div id="chart"> | |
| <button class="first last" onclick="transition()"> | |
| Update | |
| </button><p> | |
| </div> | |
| <script> | |
| var n = 20, // number of layers | |
| m = 200; // number of samples per layer | |
| var data1 = stream_layers(n, m); | |
| var data0 = stream_layers(n, m); | |
| var colors = d3.range(n).map(function() { return d3.interpolateRgb("#aad", "#556")(Math.random()); }); | |
| var streamgraph = streamgraphChart() | |
| .margin({top: 10, right: 10, bottom: 10, left: 10}) | |
| .color(function(d, i) { return colors[i]; }) // use same colors for both data sets | |
| .transitionDuration(1500) | |
| .on("mouseover", fade(.2)) | |
| .on("mouseout", fade(1)); | |
| d3.select("#chart") | |
| .datum(data0) | |
| .call(streamgraph); | |
| function transition() { | |
| d3.select("#chart") | |
| .datum(function() { | |
| var d = data1; | |
| data1 = data0; | |
| return data0 = d; | |
| }) | |
| .call(streamgraph); | |
| } | |
| function fade(opacity) { | |
| return function(g, i) { | |
| streamgraph.layers() | |
| .filter(function(h, j) { | |
| return j != i; | |
| }) | |
| .transition(1000) | |
| .style("opacity", opacity); | |
| } | |
| } | |
| </script> | |
| </body> | |
| </html> |
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| function streamgraphChart() { | |
| var margin = {top: 0, right: 0, bottom: 0, left: 0}, | |
| width = 960, | |
| height = 500, | |
| transitionDuration = 1000, | |
| color = function() { return d3.interpolateRgb("#aad", "#556")(Math.random()); }, | |
| eventHandlers = [], | |
| layers = undefined; | |
| var streamgraph = d3.layout.stack().offset("wiggle"); | |
| function chart(selection) { | |
| selection.each(function(data) { | |
| // Compute the streamgraph. | |
| data = streamgraph(data); | |
| var mx = data[0].length - 1, // assumes that all layers have same # of samples & that there is at least one layer | |
| my = d3.max(data, function(d) { | |
| return d3.max(d, function(d) { | |
| return d.y0 + d.y; | |
| }); | |
| }); | |
| // Select the svg element, if it exists. | |
| var svg = d3.select(this).selectAll("svg").data([data]); | |
| // Otherwise, create the skeletal chart. | |
| var gEnter = svg.enter().append("svg").append("g"); | |
| // Update the outer dimensions. | |
| svg .attr("width", width) | |
| .attr("height", height); | |
| // Update the inner dimensions. | |
| var g = svg.select("g") | |
| .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); | |
| // Update the streamgraph | |
| var availableWidth = width - margin.left - margin.right, | |
| availableHeight = height - margin.top - margin.bottom; | |
| var area = d3.svg.area() | |
| .x(function(d) { return d.x * availableWidth / mx; }) | |
| .y0(function(d) { return availableHeight - d.y0 * availableHeight / my; }) | |
| .y1(function(d) { return availableHeight - (d.y + d.y0) * availableHeight / my; }); | |
| layers = g.selectAll("path").data(data); | |
| var enterPath = layers.enter().append("path"); | |
| eventHandlers.forEach(function(d){ | |
| enterPath.on(d.type, d.handler); | |
| }); | |
| layers.exit().remove(); | |
| layers.style("fill", color).transition().duration(transitionDuration).attr("d", area); | |
| }); | |
| } | |
| chart.on = function(_) { | |
| // TODO needs further work | |
| eventHandlers.push({ | |
| "type": arguments[0], | |
| "handler": arguments[1] | |
| }); | |
| return chart; | |
| } | |
| chart.color = function(_) { | |
| if (!arguments.length) return color; | |
| color = _; | |
| return chart; | |
| }; | |
| chart.transitionDuration = function(_) { | |
| if (!arguments.length) return transitionDuration; | |
| transitionDuration = _; | |
| return chart; | |
| }; | |
| chart.layers = function() { | |
| return layers; | |
| } | |
| chart.margin = function(_) { | |
| if (!arguments.length) return margin; | |
| margin = _; | |
| return chart; | |
| }; | |
| chart.width = function(_) { | |
| if (!arguments.length) return width; | |
| width = _; | |
| return chart; | |
| }; | |
| chart.height = function(_) { | |
| if (!arguments.length) return height; | |
| height = _; | |
| return chart; | |
| }; | |
| return chart; | |
| } |
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| /* Inspired by Lee Byron's test data generator. */ | |
| function stream_layers(n, m, o) { | |
| if (arguments.length < 3) o = 0; | |
| function bump(a) { | |
| var x = 1 / (.1 + Math.random()), | |
| y = 2 * Math.random() - .5, | |
| z = 10 / (.1 + Math.random()); | |
| for (var i = 0; i < m; i++) { | |
| var w = (i / m - y) * z; | |
| a[i] += x * Math.exp(-w * w); | |
| } | |
| } | |
| return d3.range(n).map(function() { | |
| var a = [], i; | |
| for (i = 0; i < m; i++) a[i] = o + o * Math.random(); | |
| for (i = 0; i < 5; i++) bump(a); | |
| return a.map(stream_index); | |
| }); | |
| } | |
| function stream_index(d, i) { | |
| return {x: i, y: Math.max(0, d)}; | |
| } |
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