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<!DOCTYPE html> |
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<meta charset="utf-8"> |
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<style> /* set the CSS */ |
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.line { |
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fill: none; |
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stroke: steelblue; |
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stroke-width: 2px; |
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} |
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.axis { |
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stroke: lightgrey; |
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fill: none; |
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} |
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} |
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body { font: 12px Arial;} |
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.legend { |
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font-size: 16px; |
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font-weight: bold; |
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text-anchor: left; |
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cursor: pointer; |
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} |
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</style> |
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<body> |
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<!-- load the d3.js library --> |
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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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<script> |
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// set the dimensions and margins of the graph |
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var margin = {top: 20, right: 150, bottom: 30, left: 50}, |
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width = 960 - margin.left - margin.right, |
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height = 470 - margin.top - margin.bottom; |
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// array of curve functions and tites |
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var curveArray = [ |
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{"d3Curve":d3.curveLinear,"curveTitle":"curveLinear"}, |
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{"d3Curve":d3.curveStep,"curveTitle":"curveStep"}, |
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{"d3Curve":d3.curveStepBefore,"curveTitle":"curveStepBefore"}, |
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{"d3Curve":d3.curveStepAfter,"curveTitle":"curveStepAfter"}, |
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{"d3Curve":d3.curveBasis,"curveTitle":"curveBasis"}, |
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{"d3Curve":d3.curveBundle,"curveTitle": "curveBundle"}, |
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{"d3Curve":d3.curveCardinal,"curveTitle":"curveCardinal"}, |
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{"d3Curve":d3.curveMonotoneX,"curveTitle":"curveMonotoneX"}, |
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{"d3Curve":d3.curveNatural,"curveTitle":"curveNatural"}, |
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{"d3Curve":d3.curveCatmullRom,"curveTitle":"curveCatmullRom"} |
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]; |
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// parse the date / time |
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var parseTime = d3.timeParse("%d-%b-%y"); |
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// set the ranges |
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var x = d3.scaleTime().range([0, width]); |
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var y = d3.scaleLinear().range([height, 0]); |
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// define the line |
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var valueline = d3.line() |
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.curve(d3.curveCatmullRomOpen) |
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.x(function(d) { return x(d.date); }) |
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.y(function(d) { return y(d.close); }); |
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// append the svg obgect to the body of the page |
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// appends a 'group' element to 'svg' |
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// moves the 'group' element to the top left margin |
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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", |
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"translate(" + margin.left + "," + margin.top + ")"); |
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// Get the data |
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d3.csv("data-3.csv", function(error, data) { |
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if (error) throw error; |
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// format the data |
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data.forEach(function(d) { |
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d.date = parseTime(d.date); |
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d.close = +d.close; |
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}); |
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// set the colour scale |
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var color = d3.scaleOrdinal(d3.schemeDark2); |
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curveArray.forEach(function(daCurve,i) { |
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// Scale the range of the data |
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x.domain(d3.extent(data, function(d) { return d.date; })); |
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y.domain(d3.extent(data, function(d) { return d.close; })); |
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// Add the paths with different curves. |
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svg.append("path") |
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.datum(data) |
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.attr("class", "line") |
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.style("stroke", function() { // Add the colours dynamically |
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return daCurve.color = color(daCurve.curveTitle); }) |
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.attr("id", 'tag'+i) // assign ID |
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.attr("d", d3.line() |
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.curve(daCurve.d3Curve) |
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.x(function(d) { return x(d.date); }) |
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.y(function(d) { return y(d.close); }) |
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); |
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// Add the Legend |
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svg.append("text") |
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.attr("x", width+5) // space legend |
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.attr("y", margin.top + 20 + (i * 20)) |
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.attr("class", "legend") // style the legend |
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.style("fill", function() { // Add the colours dynamically |
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return daCurve.color = color(daCurve.curveTitle); }) |
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.on("click", function(){ |
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// Determine if current line is visible |
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var active = daCurve.active ? false : true, |
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newLineOpacity = active ? 0 : 1; |
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newLegendOpacity = active ? 0.4 : 1; |
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// Hide or show the elements based on the ID |
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d3.select("#tag"+i) |
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.transition().duration(100) |
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.style("opacity", newLineOpacity); |
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d3.select(this).style("opacity", newLegendOpacity); |
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// Update whether or not the elements are active |
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daCurve.active = active; |
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}) |
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.text(daCurve.curveTitle); |
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}); |
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// Add the scatterplot |
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svg.selectAll("dot") |
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.data(data) |
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.enter().append("circle") |
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.attr("r", 4) |
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.attr("cx", function(d) { return x(d.date); }) |
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.attr("cy", function(d) { return y(d.close); }); |
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// Add the X Axis |
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svg.append("g") |
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.attr("class", "axis") |
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.attr("transform", "translate(0," + height + ")") |
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.call(d3.axisBottom(x)); |
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// Add the Y Axis |
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svg.append("g") |
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.attr("class", "axis") |
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.call(d3.axisLeft(y)); |
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}); |
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</script> |
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</body> |
