This variation of a donut chart demonstrates how to update values. Clicking on the radio buttons changes the displayed metric.
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| apples | oranges | |
|---|---|---|
| 53245 | 200 | |
| 28479 | 200 | |
| 19697 | 200 | |
| 24037 | 200 | |
| 40245 | 200 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; | |
| margin: auto; | |
| position: relative; | |
| width: 960px; | |
| } | |
| text { | |
| font: 10px sans-serif; | |
| } | |
| form { | |
| position: absolute; | |
| right: 10px; | |
| top: 10px; | |
| } | |
| </style> | |
| <div id="pie-chart"></div> | |
| <form> | |
| <label><input type="radio" name="dataset" value="apples" checked> Apples</label> | |
| <label><input type="radio" name="dataset" value="oranges"> Oranges</label> | |
| </form> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| function pieChart() { | |
| var width = 960, | |
| height = 500, | |
| radius = Math.min(width, height) / 2, | |
| color = d3.scale.category20(), | |
| accessor, | |
| pie = d3.layout.pie(), | |
| arc = d3.svg.arc(), | |
| path; | |
| function chart(selection) { | |
| selection.each(function(data) { | |
| pie.value(accessor) | |
| .sort(null); | |
| arc.innerRadius(radius - 100) | |
| .outerRadius(radius - 20); | |
| var svg = d3.select(this).selectAll("svg").data([data]); | |
| var gEnter = svg.enter().append("svg").append("g"); | |
| svg | |
| .attr("width", width) | |
| .attr("height", height) | |
| var g = svg.select("g") | |
| .attr("transform", "translate(" + width / 2 + "," + height / 2 + ")"); | |
| path = g.datum(data).selectAll("path") | |
| .data(pie) | |
| .enter().append("path") | |
| .attr("fill", function(d, i) { return color(i); }) | |
| .attr("d", arc); | |
| }); | |
| } | |
| chart.change = function(d, i) { | |
| pie.value(accessor); // change the value function | |
| path = path.data(pie); // compute the new angles | |
| path.attr("d", arc); // redraw the arcs | |
| }; | |
| chart.accessor = function(_) { | |
| if (!arguments.length) return accessor; | |
| accessor = _; | |
| return chart; | |
| }; | |
| return chart; | |
| } | |
| d3.tsv("data.tsv", type, function(error, data) { | |
| var myChart = pieChart() | |
| .accessor(function(d) { return d.apples; }); | |
| d3.select("#pie-chart") | |
| .datum(data) | |
| .call(myChart); | |
| d3.selectAll("input") | |
| .on("change", myChart.change); | |
| var timeout = setTimeout(function() { | |
| myChart.accessor(function(d) { return d.oranges; }) | |
| myChart.change(); | |
| }, 2000); | |
| }); | |
| function type(d) { | |
| d.apples = +d.apples; | |
| d.oranges = +d.oranges; | |
| return d; | |
| } | |
| </script> |
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