Adapted example from Line Chart and Animated Line Graphs / Sparklines using SVG Path and d3.js. The objective is to examine what happens when new data points can arrive at any position of the graph.
Created
July 21, 2014 08:26
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Adapted line chart
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| date | close | |
|---|---|---|
| 1-May-12 | 0.114 | |
| 27-Apr-12 | 0.12 |
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| date | close | |
|---|---|---|
| 1-May-12 | 0.114 | |
| 30-Apr-12 | 0.112 | |
| 27-Apr-12 | 0.12 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| font: 10px sans-serif; | |
| } | |
| .axis path, | |
| .axis line { | |
| fill: none; | |
| stroke: #000; | |
| shape-rendering: crispEdges; | |
| } | |
| .x.axis path { | |
| display: none; | |
| } | |
| .line { | |
| fill: none; | |
| stroke: steelblue; | |
| stroke-width: 1.5px; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.js"></script> | |
| <script> | |
| var margin = {top: 20, right: 20, bottom: 30, left: 50}, | |
| width = 960 - margin.left - margin.right, | |
| height = 500 - margin.top - margin.bottom; | |
| var parseDate = d3.time.format("%d-%b-%y").parse; | |
| var x = d3.time.scale() | |
| .range([0, width]); | |
| var y = d3.scale.linear() | |
| .range([height, 0]); | |
| var xAxis = d3.svg.axis() | |
| .scale(x) | |
| .orient("bottom"); | |
| var yAxis = d3.svg.axis() | |
| .scale(y) | |
| .orient("left"); | |
| var line = d3.svg.line() | |
| .x(function(d) { return x(d.date); }) | |
| .y(function(d) { return y(d.close); }); | |
| var svg = d3.select("body").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("g") | |
| .attr("class", "x axis") | |
| .attr("transform", "translate(0," + height + ")") | |
| .call(xAxis); | |
| svg.append("g") | |
| .attr("class", "y axis") | |
| .call(yAxis) | |
| .append("text") | |
| .attr("transform", "rotate(-90)") | |
| .attr("y", 6) | |
| .attr("dy", ".71em") | |
| .style("text-anchor", "end") | |
| .text("Rate"); | |
| var first = true; | |
| var update = function(error, data) { | |
| data.forEach(function(d) { | |
| d.date = parseDate(d.date); | |
| d.close = +d.close; | |
| }); | |
| x.domain(d3.extent(data, function(d) { return d.date; })); | |
| y.domain(d3.extent(data, function(d) { return d.close; })); | |
| svg.select(".x.axis") | |
| .transition() | |
| .call(xAxis); | |
| svg.select(".y.axis") | |
| .transition() | |
| .call(yAxis); | |
| if (first) { | |
| svg.append("svg:path") | |
| .datum(data) | |
| .attr("class", "line") | |
| .attr("d", line); | |
| first = false; | |
| } | |
| else { | |
| svg.selectAll(".line") | |
| .datum(data) | |
| .transition() | |
| .ease("linear") | |
| .attr("d", line); | |
| } | |
| }; | |
| d3.tsv("data.tsv", update); | |
| setTimeout(function() { d3.tsv("data2.tsv", update)}, 3000); | |
| </script> |
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