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// Inspired by Lee Byron's test data generator. |
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function bumpLayer(n, o) { |
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function bump(a) { |
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var x = 1 / (.1 + Math.random()), |
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y = 2 * Math.random() - .5, |
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z = 10 / (.1 + Math.random()); |
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for (var i = 0; i < n; i++) { |
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var w = (i / n - y) * z; |
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a[i] += x * Math.exp(-w * w); |
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} |
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} |
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var a = [], i; |
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for (i = 0; i < n; ++i) a[i] = o + o * Math.random(); |
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for (i = 0; i < 5; ++i) bump(a); |
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return a.map(function(d, i) { return {x: i, y: d, w: Math.random()*100}; }); |
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} |
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var n = 4, // number of layers |
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m = 5, // number of samples per layer |
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stack = d3.layout.stack(), |
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layers = stack(d3.range(n).map(function() { return bumpLayer(m, .1); })), |
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yGroupMax = d3.max(layers, function(layer) { return d3.max(layer, function(d) { return d.y; }); }), |
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yStackMax = d3.max(layers, function(layer) { return d3.max(layer, function(d) { return d.y0 + d.y; }); }), |
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wGroupMax = d3.max(layers, function(layer) { return d3.max(layer, function(d) { return d.w; })}); |
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var margin = {top: 40, right: 10, bottom: 20, left: 10}, |
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width = 600 - margin.left - margin.right, |
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height = 600 - margin.top - margin.bottom; |
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var x = d3.scale.ordinal() |
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.domain(d3.range(m)) |
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.rangeRoundBands([0, width], .08); |
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var y = d3.scale.linear() |
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.domain([0, yStackMax]) |
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.range([height, 0]); |
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var color = d3.scale.category10() |
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.domain(d3.range(n - 1)) |
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.range(["#EA8825", "#FCBC6E", "#FF5800", "#F58025"]) |
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var xAxis = d3.svg.axis() |
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.scale(x) |
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.tickSize(0) |
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.tickPadding(6) |
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.orient("bottom"); |
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var svg = d3.select("#chart").append("svg") |
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.attr("width", width + margin.left + margin.right) |
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.attr("height", height + margin.top + margin.bottom) |
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.append("g") |
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")"); |
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var layer = svg.selectAll(".layer") |
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.data(layers) |
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.enter().append("g") |
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.attr("class", "layer") |
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.style("fill", function(d, i) { return color(i); }); |
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var rect = layer.selectAll("rect") |
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.data(function(d) { return d; }) |
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.enter().append("rect") |
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.attr("x", function(d) { return x(d.x) + (x.rangeBand() * (1 - d.w / wGroupMax)) / 2; }) |
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// .attr("x", function(d) { return x(d.x); }) |
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.attr("y", height) |
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.attr("width", function(d) { return x.rangeBand() * d.w / wGroupMax; }) |
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.attr("height", 0); |
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rect.transition() |
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.delay(function(d, i) { return i * 10; }) |
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.attr("y", function(d) { return y(d.y0 + d.y); }) |
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.attr("height", function(d) { return y(d.y0) - y(d.y0 + d.y); }); |
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svg.append("g") |
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.attr("class", "x axis") |
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.attr("transform", "translate(0," + height + ")") |
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.call(xAxis); |
