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<!DOCTYPE html> |
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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 = "value1", y2Name = "value2", // column name for y-axis in the csv |
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yAxisLabel = "Value", |
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yLabelxPosition = -5, yLabelyPosition = -17, |
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lineColor = "#729fcf", line2Color = "#3366cc"; |
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function transformXdata(data) { |
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var parseTime = d3.timeParse("%Y"); |
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return parseTime(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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var svg = d3.select("svg"), |
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margin = {top: 30, right: 30, bottom: 60, left: 50}, |
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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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g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")"); |
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var x = d3.scaleTime() |
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.rangeRound([0, width]); |
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var y = d3.scaleLinear() |
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.rangeRound([height, 0]); |
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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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y2Data: transformYdata(d[y2Name])}; |
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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.y2Data; }); |
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x.domain(d3.extent(data, function(d) { return d.xData; })); |
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y.domain([0, maxY]); |
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// Add line (y) |
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var line = d3.line() |
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.x(function(d) { return x(d.xData); }) |
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.y(function(d) { return y(d.yData); }); |
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// Add line (y2) |
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var line2 = d3.line() |
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.x(function(d) { return x(d.xData); }) |
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.y(function(d) { return y(d.y2Data); }); |
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g.append("g") |
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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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g.append("g") |
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.call(d3.axisLeft(y)) |
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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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g.append("path") |
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.datum(data) |
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.attr("fill", "none") |
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.attr("stroke", lineColor) |
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.attr("stroke-linejoin", "round") |
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.attr("stroke-linecap", "round") |
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.attr("stroke-width", 2.5) |
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.attr("d", line); |
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g.append("path") |
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.datum(data) |
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.attr("fill", "none") |
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.attr("stroke", line2Color) |
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.attr("stroke-linejoin", "round") |
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.attr("stroke-linecap", "round") |
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.attr("stroke-width", 2.5) |
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.attr("d", line2); |
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}); |
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</script> |