Quick example demonstrating how to sort a bar chart and animate the reordering. The staggered delay makes it easier to follow individual bars, per Heer & Robertson. Built with d3.js.
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Sortable Bar Chart
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| license: gpl-3.0 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <body> | |
| <style> | |
| body { | |
| font: 10px sans-serif; | |
| } | |
| .bar rect { | |
| fill: steelblue; | |
| } | |
| .bar text { | |
| fill: white; | |
| } | |
| .axis path, .axis line { | |
| fill: none; | |
| stroke: black; | |
| shape-rendering: crispEdges; | |
| } | |
| </style> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var margin = {top: 0, right: 10, bottom: 20, left: 10}, | |
| width = 960 - margin.left - margin.right, | |
| height = 500 - margin.top - margin.bottom; | |
| var index = d3.range(24), | |
| data = index.map(d3.random.normal(100, 10)); | |
| var x = d3.scale.linear() | |
| .domain([0, d3.max(data)]) | |
| .range([0, width]); | |
| var y = d3.scale.ordinal() | |
| .domain(index) | |
| .rangeRoundBands([0, height], .1); | |
| 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 + ")"); | |
| var bar = svg.selectAll(".bar") | |
| .data(data) | |
| .enter().append("g") | |
| .attr("class", "bar") | |
| .attr("transform", function(d, i) { return "translate(0," + y(i) + ")"; }); | |
| bar.append("rect") | |
| .attr("height", y.rangeBand()) | |
| .attr("width", x); | |
| bar.append("text") | |
| .attr("text-anchor", "end") | |
| .attr("x", function(d) { return x(d) - 6; }) | |
| .attr("y", y.rangeBand() / 2) | |
| .attr("dy", ".35em") | |
| .text(function(d, i) { return i; }); | |
| svg.append("g") | |
| .attr("class", "x axis") | |
| .attr("transform", "translate(0," + height + ")") | |
| .call(d3.svg.axis() | |
| .scale(x) | |
| .orient("bottom")); | |
| var sort = false; | |
| setInterval(function() { | |
| if (sort = !sort) { | |
| index.sort(function(a, b) { return data[a] - data[b]; }); | |
| } else { | |
| index = d3.range(24); | |
| } | |
| y.domain(index); | |
| bar.transition() | |
| .duration(750) | |
| .delay(function(d, i) { return i * 50; }) | |
| .attr("transform", function(d, i) { return "translate(0," + y(i) + ")"; }); | |
| }, 5000); | |
| </script> |
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