| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <style> |
| |
| svg { |
| font: 10px sans-serif; |
| } |
| |
| .line { |
| fill: none; |
| stroke: darkgreen; |
| stroke-width: 2px; |
| } |
| |
| .axis path, |
| .axis line { |
| fill: none; |
| stroke: #999; |
| stroke-width: 2px; |
| shape-rendering: crispEdges; |
| } |
| |
| </style> |
| <body> |
| <script src="http://d3js.org/d3.v3.min.js"></script> |
| <script> |
| (function () { |
| var cs = 0, |
| samples = [ |
| 89.53, |
| 37515.81, |
| 104609.6, |
| 113105.11, |
| 103194.74, |
| 122151.63, |
| 128623.9, |
| 137325.33, |
| 154897.31, |
| 161235.07, |
| 162025.4, |
| 164902.64, |
| 158196.26, |
| 161072.44, |
| 160792.54, |
| 164692.44, |
| 161979.74, |
| 162137.4, |
| 159325.19, |
| 170465.44, |
| 168186.46, |
| 171152.34, |
| 168221.02, |
| 167440.73, |
| 165003.39, |
| 166855.18, |
| 157268.79, |
| 164087.54, |
| 162265.21, |
| 165990.16, |
| 176364.01, |
| 172064.07, |
| 184872.24, |
| 183249.8, |
| 182282.47, |
| 171475.11, |
| 158880.58, |
| 166016.69, |
| 168233.16, |
| 177759.92, |
| 179742.87, |
| 170819.44, |
| 167577.73, |
| 169479.9, |
| 175544.89, |
| 183792.01, |
| 184689.52, |
| 178503.87, |
| 173219.27, |
| 179085.49, |
| 179700.54, |
| 174281.17, |
| 181353.08, |
| 180173.14, |
| 184093.16, |
| 186011.5, |
| 176952.79, |
| 175319.2, |
| 169001.05, |
| 174545.12, |
| 169156.29, |
| 171804.3, |
| 159155.54, |
| 154709.96, |
| 157263.97 |
| ], |
| theSample, |
| headers = [ "Whole", "Half", "Third" ]; |
| |
| var n = 243, |
| duration = 750, |
| now = new Date(Date.now() - duration), |
| data = []; |
| |
| headers.forEach(function (d, li) { |
| data[li] = d3.range(n).map(function () { return 0; }); |
| }); |
| |
| var margin = {top: 20, right: 100, bottom: 20, left: 100}, |
| width = 960 - margin.right, |
| height = 512 - margin.top - margin.bottom; |
| |
| var x = d3.time.scale() |
| .domain([now - (n - 2) * duration, now - duration]) |
| .range([0, width]); |
| |
| var y = d3.scale.linear() |
| .domain([0, 200000]) |
| .range([height, 0]); |
| |
| var svg = d3.select("body").append("p").append("svg") |
| .attr("width", width + margin.left + margin.right) |
| .attr("height", height + margin.top + margin.bottom) |
| .append("g") |
| .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); |
| |
| svg.append("defs").append("clipPath") |
| .attr("id", "clip") |
| .append("rect") |
| .attr("width", width) |
| .attr("height", height); |
| |
| var axis = svg.append("g") |
| .attr("class", "x axis") |
| .attr("transform", "translate(0," + height + ")") |
| .call(x.axis = d3.svg.axis().scale(x).orient("bottom")); |
| |
| svg.append("g") |
| .attr("class", "y axis") |
| .call(d3.svg.axis().scale(y).orient("left")); |
| |
| svg.append("g") |
| .attr("class", "y axis") |
| .attr("transform", "translate(" + width + " ,0)") |
| .call(d3.svg.axis().scale(y).orient("right")); |
| |
| var lines = [], paths = []; |
| data.forEach(function (p, li) { |
| lines[li]= d3.svg.line() |
| .interpolate("basis") |
| .x(function (d, i) { |
| return x(now - (n - 1 - i) * duration); |
| }) |
| .y(function (d, i) { |
| return y(d); |
| }); |
| |
| paths[li] = svg.append("g") |
| .attr("clip-path", "url(#clip)") |
| .append("path") |
| .datum(function () { return data[li]; }) |
| .attr("id", "line" + li) |
| .attr("class", "line"); |
| }); |
| |
| var transition = d3.select({}).transition() |
| .duration(750) |
| .ease("linear"); |
| |
| function tick() { |
| transition = transition.each(function () { |
| // update the domains |
| now = new Date(); |
| x.domain([now - (n - 2) * duration, now - duration]); |
| |
| data.forEach(function (d, li) { |
| // push the new most recent sample onto the back |
| d.push(theSample[li]); |
| |
| // redraw the line and slide it left |
| paths[li].attr("d", lines[li]).attr("transform", null); |
| paths[li].transition().attr("transform", "translate(" + x(now - (n - 1) * duration) + ")"); |
| |
| // pop the old data point off the front |
| d.shift(); |
| }); |
| |
| // slide the x-axis left |
| axis.call(x.axis); |
| |
| }).transition().each("start", tick); |
| } |
| |
| function setSample() { |
| var v = samples[cs++]; |
| theSample = [ v, v/2, v/3 ]; |
| } |
| |
| setSample(); |
| setInterval(setSample, 1000); |
| tick(); |
| |
| })() |
| </script> |
| </body> |
| </html> |