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<!DOCTYPE html> |
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<head> |
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<meta charset="utf-8"> |
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<script src="https://d3js.org/d3.v4.min.js"></script> |
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<script src="https://d3js.org/d3-scale-chromatic.v1.min.js"></script> |
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<style> |
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body { margin:0; position:fixed; top:0; right:0; bottom:0; left:0; } |
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body { |
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font-family: monospace; |
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} |
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.y-axis line{ |
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stroke: black; |
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} |
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.annual-growth { |
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fill: black; |
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} |
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.bar-label, .x-axis { |
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font-size: 8px; |
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} |
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.domain, .tick line { |
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opacity: 0.5; |
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} |
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</style> |
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</head> |
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<body> |
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<script> |
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var margin = {top: 40, right: 50, bottom: 60, left: 50}; |
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var width = 960 - margin.left - margin.right, |
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height = 500 - margin.top - margin.bottom; |
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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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// Config |
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var cfg = { |
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labelMargin: 5, |
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xAxisMargin: 10, |
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legendRightMargin: 0 |
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} |
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var x = d3.scaleLinear() |
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.range([0, width]); |
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var colour = d3.scaleSequential(d3.interpolatePRGn); |
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var y = d3.scaleBand() |
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.range([height, 0]) |
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.padding(0.1); |
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function parse(d) { |
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d.rank = +d.rank; |
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d.annual_growth = +d.annual_growth; |
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return d; |
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} |
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var legend = svg.append("g") |
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.attr("class", "legend"); |
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legend.append("text") |
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.attr("x", width - cfg.legendRightMargin) |
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.attr("text-anchor", "end") |
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.text("European Countries by"); |
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legend.append("text") |
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.attr("x", width - cfg.legendRightMargin) |
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.attr("y", 20) |
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.attr("text-anchor", "end") |
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.style("opacity", 0.5) |
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.text("2016 Population Growth Rate (%)"); |
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d3.csv("popgrowth.csv", parse, function(error, data) { |
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if (error) throw error; |
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y.domain(data.map(function(d) { return d.country; })); |
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x.domain(d3.extent(data, function(d) { return d.annual_growth; })); |
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var max = d3.max(data, function(d) { return d.annual_growth; }); |
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colour.domain([-max, max]); |
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var yAxis = svg.append("g") |
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.attr("class", "y-axis") |
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.attr("transform", "translate(" + x(0) + ",0)") |
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.append("line") |
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.attr("y1", 0) |
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.attr("y2", height); |
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var xAxis = svg.append("g") |
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.attr("class", "x-axis") |
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.attr("transform", "translate(0," + (height + cfg.xAxisMargin) + ")") |
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.call(d3.axisBottom(x).tickSizeOuter(0)); |
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var bars = svg.append("g") |
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.attr("class", "bars") |
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bars.selectAll("rect") |
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.data(data) |
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.enter().append("rect") |
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.attr("class", "annual-growth") |
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.attr("x", function(d) { |
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return x(Math.min(0, d.annual_growth)); |
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}) |
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.attr("y", function(d) { return y(d.country); }) |
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.attr("height", y.bandwidth()) |
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.attr("width", function(d) { |
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return Math.abs(x(d.annual_growth) - x(0)) |
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}) |
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.style("fill", function(d) { |
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return colour(d.annual_growth) |
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}); |
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var labels = svg.append("g") |
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.attr("class", "labels"); |
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labels.selectAll("text") |
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.data(data) |
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.enter().append("text") |
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.attr("class", "bar-label") |
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.attr("x", x(0)) |
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.attr("y", function(d) { return y(d.country )}) |
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.attr("dx", function(d) { |
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return d.annual_growth < 0 ? cfg.labelMargin : -cfg.labelMargin; |
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}) |
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.attr("dy", y.bandwidth()) |
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.attr("text-anchor", function(d) { |
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return d.annual_growth < 0 ? "start" : "end"; |
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}) |
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.text(function(d) { return d.country }) |
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.style("fill", function(d) { |
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if (d.country == "European Union") { |
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return "blue"; |
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} |
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}); |
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}); |
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</script> |
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</body> |
