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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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.axisSteelBlue text{ |
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fill: steelblue; |
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} |
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.axisRed text{ |
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fill: red; |
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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> |
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// set the dimensions and margins of the graph |
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var margin = {top: 20, right: 40, bottom: 30, left: 50}, |
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width = 960 - margin.left - margin.right, |
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height = 500 - margin.top - margin.bottom; |
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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 y0 = d3.scaleLinear().range([height, 0]); |
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var y1 = d3.scaleLinear().range([height, 0]); |
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// define the 1st line |
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var valueline = d3.line() |
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.x(function(d) { return x(d.date); }) |
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.y(function(d) { return y0(d.close); }); |
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// define the 2nd line |
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var valueline2 = d3.line() |
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.x(function(d) { return x(d.date); }) |
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.y(function(d) { return y1(d.open); }); |
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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("data4.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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d.open = +d.open; |
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}); |
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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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y0.domain([0, d3.max(data, function(d) {return Math.max(d.close);})]); |
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y1.domain([0, d3.max(data, function(d) {return Math.max(d.open); })]); |
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// Add the valueline path. |
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svg.append("path") |
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.data([data]) |
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.attr("class", "line") |
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.attr("d", valueline); |
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// Add the valueline2 path. |
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svg.append("path") |
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.data([data]) |
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.attr("class", "line") |
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.style("stroke", "red") |
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.attr("d", valueline2); |
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// Add the X Axis |
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svg.append("g") |
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.attr("transform", "translate(0," + height + ")") |
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.call(d3.axisBottom(x)); |
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// Add the Y0 Axis |
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svg.append("g") |
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.attr("class", "axisSteelBlue") |
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.call(d3.axisLeft(y0)); |
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// Add the Y1 Axis |
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svg.append("g") |
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.attr("class", "axisRed") |
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.attr("transform", "translate( " + width + ", 0 )") |
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.call(d3.axisRight(y1)); |
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}); |
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</script> |
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</body> |
