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<!DOCTYPE html> |
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<meta charset="utf-8"> |
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<style> |
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body { |
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font: 10px sans-serif; |
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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: #000; |
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shape-rendering: crispEdges; |
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} |
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.x.axis path { |
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display: none; |
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} |
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.line { |
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fill: none; |
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stroke: steelblue; |
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stroke-width: 1.5px; |
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} |
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.overlay { |
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fill: none; |
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pointer-events: all; |
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} |
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.focus { |
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opacity: 0.7; |
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} |
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.focus circle { |
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fill: none; |
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stroke: black; |
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} |
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.focus line { |
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fill: none; |
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stroke: black; |
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stroke-width: 1.5px; |
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stroke-dasharray: 3 3; |
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} |
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</style> |
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<body> |
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<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> |
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<script> |
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var margin = {top: 20, right: 50, 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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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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formatValue = d3.format(",.2f"), |
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formatCurrency = function(d) { return "$" + formatValue(d); }; |
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var x = d3.time.scale() |
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.range([0, width]); |
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var y = d3.scale.linear() |
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.range([height, 0]); |
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var xAxis = d3.svg.axis() |
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.scale(x) |
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.orient("bottom"); |
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var yAxis = d3.svg.axis() |
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.scale(y) |
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.orient("left"); |
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var line = 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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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", "translate(" + margin.left + "," + margin.top + ")"); |
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d3.tsv("data.tsv", function(error, data) { |
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if (error) throw error; |
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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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data.sort(function(a, b) { |
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return a.date - b.date; |
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}); |
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x.domain([data[0].date, data[data.length - 1].date]); |
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y.domain(d3.extent(data, function(d) { return d.close; })); |
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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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svg.append("g") |
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.attr("class", "y axis") |
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.call(yAxis) |
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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", ".71em") |
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.style("text-anchor", "end") |
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.text("Price ($)"); |
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svg.append("path") |
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.datum(data) |
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.attr("class", "line") |
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.attr("d", line); |
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var focus = svg.append("g") |
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.attr("class", "focus") |
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.style("display", "none"); |
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focus.append("circle") |
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.attr("r", 4.5); |
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focus.append("line") |
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.classed("x", true) |
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focus.append("line") |
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.classed("y", true) |
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focus.append("text") |
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.attr("x", 9) |
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.attr("dy", ".35em"); |
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svg.append("rect") |
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.attr("class", "overlay") |
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.attr("width", width) |
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.attr("height", height) |
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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.attr("transform", "translate(" + x(d.date) + "," + y(d.close) + ")"); |
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focus.select("line.x") |
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.attr("x1", 0) |
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.attr("x2", -x(d.date)) |
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.attr("y1", 0) |
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.attr("y2", 0) |
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focus.select("line.y") |
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.attr("x1", 0) |
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.attr("x2", 0) |
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.attr("y1", 0) |
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.attr("y2", height - y(d.close)) |
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focus.select("text").text(formatCurrency(d.close)); |
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} |
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}); |
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</script> |