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<!DOCTYPE html> |
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<meta charset="utf-8"> |
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<style> |
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.bar:hover { |
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fill: #729fcf; |
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} |
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.axis--x path { |
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display: none; |
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} |
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svg { |
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font-family: sans-serif; |
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} |
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</style> |
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<svg width="960" height="500"></svg> |
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<script src="https://d3js.org/d3.v4.min.js"></script> |
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<script> |
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// *** EDIT TO CUSTOMISE *** |
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var dataFile = "test-data.csv", |
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xName = "year", // column name for x-axis in the csv |
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xAxisLabel = "Years", |
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xLabelxPosition = 0, xLabelyPosition = 40, |
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yName = "value", // column name for y-axis in the csv |
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yAxisLabel = "Value" |
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yLabelxPosition = 0, yLabelyPosition = -15, |
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barColor= "#3366cc"; |
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function transformXdata(data) { |
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return data; |
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} |
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function transformYdata(data) { |
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return +data; // '+' converts to numbers |
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} |
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// ************************** |
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// Define the svg element, the plot dimensions (and margins) |
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var svg = d3.select("svg"), |
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margin = {top: 40, right: 10, bottom: 60, left: 40}, |
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width = +svg.attr("width") - margin.left - margin.right, |
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height = +svg.attr("height") - margin.top - margin.bottom; |
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var x = d3.scaleBand().rangeRound([0, width]).padding(0.1), |
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y = d3.scaleLinear().rangeRound([height, 0]); |
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// Define the svg subelements 'g' |
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var g = svg.append("g") |
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")"); |
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d3.csv(dataFile, function(d) { |
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return {xData: transformXdata(d[xName]), |
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yData: transformYdata(d[yName])}; |
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}, function(error, data) { |
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if (error) throw error; |
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// Define the span of x and y axis |
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var maxY= d3.max(data, function(d) { return d.yData; }); |
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x.domain(data.map(function(d) { return d.xData; })); |
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y.domain([0, maxY]); |
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// Add the x-axis |
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g.append("g") |
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.attr("class", "axis axis--x") |
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.attr("transform", "translate(0," + height + ")") |
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.call(d3.axisBottom(x)) |
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.append("text") // Add x-axis label |
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.attr("fill", "#000") |
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.attr("x", (width /2) + xLabelxPosition) |
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.attr("y", xLabelyPosition) |
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.style("font-size", "14px") |
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.text(xAxisLabel); |
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// Add the y-axis |
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g.append("g") |
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.attr("class", "axis axis--y") |
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.call(d3.axisLeft(y).ticks(10)) |
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.append("text") // Add y-axis label |
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.attr("fill", "#000") |
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.attr("x", yLabelxPosition) |
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.attr("y", yLabelyPosition) |
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.style("font-size", "14px") |
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.text(yAxisLabel); |
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// Add one bar per data point |
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g.selectAll(".bar") |
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.data(data) |
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.enter().append("rect") |
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.attr("class", "bar") |
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.attr("fill", barColor) |
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.attr("x", function(d) { return x(d.xData); }) |
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.attr("y", function(d) { return y(d.yData); }) |
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.attr("width", x.bandwidth()) |
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.attr("height", function(d) { return height - y(d.yData); }); |
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}); |
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</script> |
