bar to pie
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August 29, 2015 14:02
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .axis text { | |
| font: 10px sans-serif; | |
| } | |
| .axis line, | |
| .axis path { | |
| fill: none; | |
| stroke: #000; | |
| shape-rendering: crispEdges; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var dispatch = d3.dispatch("load", "statechange"); | |
| var groups = [ | |
| "Under 5 Years", | |
| "5 to 13 Years", | |
| "14 to 17 Years", | |
| "18 to 24 Years", | |
| "25 to 44 Years", | |
| "45 to 64 Years", | |
| "65 Years and Over" | |
| ]; | |
| d3.csv("data.csv", type, function(error, states) { | |
| if (error) throw error; | |
| var stateById = d3.map(); | |
| states.forEach(function(d) { stateById.set(d.id, d); }); | |
| dispatch.load(stateById); | |
| dispatch.statechange(stateById.get("CA")); | |
| }); | |
| // A drop-down menu for selecting a state; uses the "menu" namespace. | |
| dispatch.on("load.menu", function(stateById) { | |
| var select = d3.select("body") | |
| .append("div") | |
| .append("select") | |
| .on("change", function() { dispatch.statechange(stateById.get(this.value)); }); | |
| select.selectAll("option") | |
| .data(stateById.values()) | |
| .enter().append("option") | |
| .attr("value", function(d) { return d.id; }) | |
| .text(function(d) { return d.id; }); | |
| dispatch.on("statechange.menu", function(state) { | |
| select.property("value", state.id); | |
| }); | |
| }); | |
| // A bar chart to show total population; uses the "bar" namespace. | |
| dispatch.on("load.bar", function(stateById) { | |
| var margin = {top: 20, right: 20, bottom: 30, left: 40}, | |
| width = 80 - margin.left - margin.right, | |
| height = 460 - margin.top - margin.bottom; | |
| var y = d3.scale.linear() | |
| .domain([0, d3.max(stateById.values(), function(d) { return d.total; })]) | |
| .rangeRound([height, 0]) | |
| .nice(); | |
| var yAxis = d3.svg.axis() | |
| .scale(y) | |
| .orient("left") | |
| .tickFormat(d3.format(".2s")); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width + margin.left + margin.right) | |
| .attr("height", height + margin.top + margin.bottom) | |
| .append("g") | |
| .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); | |
| svg.append("g") | |
| .attr("class", "y axis") | |
| .call(yAxis); | |
| var rect = svg.append("rect") | |
| .attr("x", 4) | |
| .attr("width", width - 4) | |
| .attr("y", height) | |
| .attr("height", 0) | |
| .style("fill", "#aaa"); | |
| dispatch.on("statechange.bar", function(d) { | |
| rect.transition() | |
| .attr("y", y(d.total)) | |
| .attr("height", y(0) - y(d.total)); | |
| }); | |
| }); | |
| // A pie chart to show population by age group; uses the "pie" namespace. | |
| dispatch.on("load.pie", function(stateById) { | |
| var width = 880, | |
| height = 460, | |
| radius = Math.min(width, height) / 2; | |
| var color = d3.scale.ordinal() | |
| .domain(groups) | |
| .range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]); | |
| var arc = d3.svg.arc() | |
| .outerRadius(radius - 10) | |
| .innerRadius(radius - 70); | |
| var pie = d3.layout.pie() | |
| .sort(null); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .append("g") | |
| .attr("transform", "translate(" + width / 2 + "," + height / 2 + ")"); | |
| var path = svg.selectAll("path") | |
| .data(groups) | |
| .enter().append("path") | |
| .style("fill", color) | |
| .each(function() { this._current = {startAngle: 0, endAngle: 0}; }); | |
| dispatch.on("statechange.pie", function(d) { | |
| path.data(pie.value(function(g) { return d[g]; })(groups)).transition() | |
| .attrTween("d", function(d) { | |
| var interpolate = d3.interpolate(this._current, d); | |
| this._current = interpolate(0); | |
| return function(t) { | |
| return arc(interpolate(t)); | |
| }; | |
| }); | |
| }); | |
| }); | |
| // Coerce population counts to numbers and compute total per state. | |
| function type(d) { | |
| d.total = d3.sum(groups, function(k) { return d[k] = +d[k]; }); | |
| return d; | |
| } | |
| </script> |
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