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<!DOCTYPE html> |
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<meta charset="utf-8"> |
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<style> |
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body { |
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font-family: helvetica; |
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} |
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.label { |
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font-size: 10px; |
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text-anchor: middle; |
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} |
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.arc path { |
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stroke: #fff; |
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} |
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</style> |
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<body> |
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<svg width="960" height="500"></svg> |
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</body> |
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<script src="https://d3js.org/d3.v4.min.js"></script> |
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<script> |
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var svg = d3.select("svg"), |
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width = +svg.attr("width"), |
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height = +svg.attr("height"), |
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radius = Math.min(width, height) / 2.1, |
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g = svg.append("g").attr("transform", "translate(" + width / 1.8 + "," + ((height / 2) + 10) + ")"); |
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var color = d3.scaleOrdinal(d3.schemeCategory20); |
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var pie = d3.pie() |
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.sort(null) |
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.value(function(d) { return d.percent; }); |
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var path = d3.arc() |
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.outerRadius(radius - 10) |
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.innerRadius(0); |
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var label = d3.arc() |
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.outerRadius(radius + 10) |
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.innerRadius(radius + 10); |
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svg.append("text") |
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.attr("transform", "translate(20,30)") |
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.attr("font-size", "2em") |
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.text("American Pie"); |
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svg.append("text") |
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.attr("transform", "translate(20,60)") |
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.attr("font-size", "1em") |
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.text("(where do US individual income tax dollars go)"); |
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d3.csv("data.csv", function(d) { |
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d.percent = +d.percent; |
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return d; |
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}, function(error, data) { |
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if (error) throw error; |
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var arc = g.selectAll(".arc") |
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.data(pie(data)) |
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.enter().append("g") |
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.attr("class", "arc"); |
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arc.append("path") |
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.attr("d", path) |
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.attr("fill", function(d) { return color(d.data.category); }); |
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g.selectAll("text").data(pie(data)) |
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.enter().append("text") |
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.attr("class", "label") |
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.attr("transform", function(d) { return "translate(" + label.centroid(d) + ")"; }) |
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.attr("dy", "0.35em") |
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.text(function(d) { return (100*d.data.percent).toPrecision(2) + "%"; }); |
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// Setup legend |
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var legendDotSize = 30; |
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var legendWrapper = svg.append("g") |
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.attr("class", "legend") |
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.attr("transform", function(d) { return "translate(20,110)"; }) |
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// The text of the legend |
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var legendText = legendWrapper.selectAll("text") |
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.data(data); |
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legendText.enter().append("text") |
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.attr("y", function(d, i) { return i * legendDotSize + 12; }) |
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.attr("x", 20) |
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.merge(legendText) |
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.text(function(d) { |
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return d.category; |
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}); |
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legendText.exit().remove(); |
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// The dots of the legend |
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var legendDot = legendWrapper.selectAll("rect") |
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.data(data); |
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legendDot.enter().append("rect") |
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.attr("y", function(d, i) { return i * legendDotSize; }) |
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.attr("rx", legendDotSize * 0.5) |
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.attr("ry", legendDotSize * 0.5) |
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.attr("width", legendDotSize * 0.5) |
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.attr("height", legendDotSize * 0.5) |
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.merge(legendDot) |
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.style("fill", function(d) { return color(d.category); }); |
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legendDot.exit().remove(); |
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}); |
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</script> |
