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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 = "stockholm_may_temp.csv", |
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xName = "day", // column name for x-axis in the csv |
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xAxisLabel = "Days of the month (May 2018)", |
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xLabelxPosition = -60, xLabelyPosition = 80, |
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yName = "maximal", // column name for y-axis (bar) in the csv |
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y2Name = "historical_max", // column name for y-axis (line) in the csv |
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yAxisLabel = "Temperature (°C)", |
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barColor = "#3366cc", lineColor = "#16a085", |
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legendData = [{"name": yName, "color": barColor}, |
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{"name": y2Name, "color": lineColor}]; |
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function transformXdata(data) { |
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return data.substring(0, 2); |
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} |
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function transformYdata(data) { |
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return data; |
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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: 50, right: 20, bottom: 50, left: 30}, |
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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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y2Data: transformYdata(d[y2Name])}; // '+' converts to numbers |
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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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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.y2Data); }); |
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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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svg.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", height + 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") |
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.attr("transform", "rotate(-90)") |
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.attr("y", 6) |
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.attr("dy", "0.71em"); |
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svg.append("text") // Add y-axis label |
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.attr("fill", "#000") |
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.attr("x", 0) |
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.attr("y", maxY) |
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.style("font-size", "14px") |
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.text(yAxisLabel); |
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// Add one bars (y) |
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var widthBar = x.bandwidth(); |
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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", widthBar) |
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.attr("height", function(d) { return height - y(d.yData); }); |
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// Add line (y2) |
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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("transform", "translate(" + widthBar / 2 + ",0)") |
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.attr("stroke-width", 2.5) |
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.attr("d", line); |
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// Add a title |
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svg.append("svg:text") |
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.style("font-size", "18px") |
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.attr("class", "title") |
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.attr("x", 250) |
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.attr("y", maxY) |
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.text("Maximal temperatures in Stockholm in May 2018"); |
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// Add a legend |
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var legend = svg.append("g") |
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.attr("class", "legend") |
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.attr("height", 100) |
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.attr("width", 100) |
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.attr("transform", "translate(-790,60)"); |
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legend.selectAll("rect") |
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.data(legendData) |
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.enter() |
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.append("rect") |
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.attr("x", width - 65) |
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.attr("y", function(d, i){ return i * 20;}) |
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.attr("width", 10) |
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.attr("height", 10) |
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.style("fill", function(d) { |
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return d.color; |
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}); |
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legend.selectAll("text") |
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.data(legendData) |
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.enter() |
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.append("text") |
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.attr("fill", "#000") |
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.attr("x", width - 52) |
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.attr("y", function(d, i){ return i * 20 + 9;}) |
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.text(function(d) { |
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return d.name; |
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}); |
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}); |
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</script> |