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<!DOCTYPE html> |
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<meta charset="utf-8"> |
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<style> |
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.axis text { |
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font: 10px sans-serif; |
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} |
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.axis line, |
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.axis path { |
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fill: none; |
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stroke: #000; |
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shape-rendering: crispEdges; |
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} |
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</style> |
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<body> |
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<script src="//d3js.org/d3.v3.min.js"></script> |
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<script> |
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var dispatch = d3.dispatch("load", "statechange"); |
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var groups = [ |
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"Under 5 Years", |
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"5 to 13 Years", |
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"14 to 17 Years", |
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"18 to 24 Years", |
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"25 to 44 Years", |
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"45 to 64 Years", |
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"65 Years and Over" |
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]; |
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d3.csv("data.csv", type, function(error, states) { |
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if (error) throw error; |
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var stateById = d3.map(); |
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states.forEach(function(d) { stateById.set(d.id, d); }); |
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dispatch.load(stateById); |
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dispatch.statechange(stateById.get("CA")); |
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}); |
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// A drop-down menu for selecting a state; uses the "menu" namespace. |
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dispatch.on("load.menu", function(stateById) { |
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var select = d3.select("body") |
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.append("div") |
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.append("select") |
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.on("change", function() { dispatch.statechange(stateById.get(this.value)); }); |
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select.selectAll("option") |
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.data(stateById.values()) |
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.enter().append("option") |
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.attr("value", function(d) { return d.id; }) |
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.text(function(d) { return d.id; }); |
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dispatch.on("statechange.menu", function(state) { |
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select.property("value", state.id); |
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}); |
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}); |
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// A bar chart to show total population; uses the "bar" namespace. |
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dispatch.on("load.bar", function(stateById) { |
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var margin = {top: 20, right: 20, bottom: 30, left: 40}, |
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width = 80 - margin.left - margin.right, |
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height = 460 - margin.top - margin.bottom; |
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var y = d3.scale.linear() |
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.domain([0, d3.max(stateById.values(), function(d) { return d.total; })]) |
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.rangeRound([height, 0]) |
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.nice(); |
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var yAxis = d3.svg.axis() |
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.scale(y) |
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.orient("left") |
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.tickFormat(d3.format(".2s")); |
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var svg = d3.select("body").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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svg.append("g") |
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.attr("class", "y axis") |
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.call(yAxis); |
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var rect = svg.append("rect") |
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.attr("x", 4) |
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.attr("width", width - 4) |
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.attr("y", height) |
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.attr("height", 0) |
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.style("fill", "#aaa"); |
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dispatch.on("statechange.bar", function(d) { |
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rect.transition() |
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.attr("y", y(d.total)) |
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.attr("height", y(0) - y(d.total)); |
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}); |
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}); |
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// A pie chart to show population by age group; uses the "pie" namespace. |
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dispatch.on("load.pie", function(stateById) { |
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var width = 880, |
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height = 460, |
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radius = Math.min(width, height) / 2; |
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var color = d3.scale.ordinal() |
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.domain(groups) |
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.range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]); |
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var arc = d3.svg.arc() |
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.outerRadius(radius - 10) |
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.innerRadius(radius - 70); |
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var pie = d3.layout.pie() |
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.sort(null); |
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var svg = d3.select("body").append("svg") |
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.attr("width", width) |
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.attr("height", height) |
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.append("g") |
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.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")"); |
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var path = svg.selectAll("path") |
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.data(groups) |
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.enter().append("path") |
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.style("fill", color) |
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.each(function() { this._current = {startAngle: 0, endAngle: 0}; }); |
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dispatch.on("statechange.pie", function(d) { |
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path.data(pie.value(function(g) { return d[g]; })(groups)).transition() |
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.attrTween("d", function(d) { |
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var interpolate = d3.interpolate(this._current, d); |
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this._current = interpolate(0); |
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return function(t) { |
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return arc(interpolate(t)); |
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}; |
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}); |
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}); |
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}); |
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// Coerce population counts to numbers and compute total per state. |
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function type(d) { |
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d.total = d3.sum(groups, function(k) { return d[k] = +d[k]; }); |
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return d; |
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} |
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</script> |
