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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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body { font: 12px Arial;} |
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path { |
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stroke: steelblue; |
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stroke-width: 2; |
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fill: none; |
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} |
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.axis path, |
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.axis line { |
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fill: none; |
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stroke: grey; |
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stroke-width: 1; |
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shape-rendering: crispEdges; |
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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://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.min.js"></script> |
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<script> |
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// Set the dimensions of the canvas / graph |
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var margin = {top: 30, right: 20, bottom: 30, left: 50}, |
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width = 600 - margin.left - margin.right, |
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height = 270 - margin.top - margin.bottom; |
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// Parse the date / time |
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var parseDate = d3.time.format("%d-%b-%y").parse; |
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bisectDate = d3.bisector(function(d) { return d.date; }).left; |
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// Set the ranges |
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var x = d3.time.scale().range([0, width]); |
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var y = d3.scale.linear().range([height, 0]); |
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// Define the axes |
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var xAxis = d3.svg.axis().scale(x) |
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.orient("bottom").ticks(5); |
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var yAxis = d3.svg.axis().scale(y) |
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.orient("left").ticks(5); |
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// Define the line |
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var valueline = d3.svg.line() |
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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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// Adds the svg canvas |
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var svg = d3.select("body") |
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.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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var lineSvg = svg.append("g"); |
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var focus = svg.append("g") |
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.style("display", "none"); |
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// Get the data |
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d3.csv("atad.csv", function(error, data) { |
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data.forEach(function(d) { |
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d.date = parseDate(d.date); |
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d.close = +d.close; |
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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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y.domain([0, d3.max(data, function(d) { return d.close; })]); |
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// Add the valueline path. |
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lineSvg.append("path") |
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.attr("class", "line") |
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.attr("d", valueline(data)); |
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// Add the X Axis |
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svg.append("g") |
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.attr("class", "x axis") |
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.attr("transform", "translate(0," + height + ")") |
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.call(xAxis); |
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// Add the Y Axis |
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svg.append("g") |
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.attr("class", "y axis") |
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.call(yAxis); |
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// append the circle at the intersection |
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focus.append("circle") |
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.attr("class", "y") |
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.style("fill", "none") |
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.style("stroke", "blue") |
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.attr("r", 4); |
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// append the rectangle to capture mouse |
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svg.append("rect") |
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.attr("width", width) |
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.attr("height", height) |
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.style("fill", "none") |
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.style("pointer-events", "all") |
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.on("mouseover", function() { focus.style("display", null); }) |
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.on("mouseout", function() { focus.style("display", "none"); }) |
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.on("mousemove", mousemove); |
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function mousemove() { |
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var x0 = x.invert(d3.mouse(this)[0]), |
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i = bisectDate(data, x0, 1), |
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d0 = data[i - 1], |
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d1 = data[i], |
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d = x0 - d0.date > d1.date - x0 ? d1 : d0; |
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focus.select("circle.y") |
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.attr("transform", |
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"translate(" + x(d.date) + "," + |
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y(d.close) + ")"); |
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} |
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}); |
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</script> |
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</body> |
