This variation of a simple bar chart adds sorting with staggered delay and translucency to improve readability during the transition. This technique is recommended by Heer & Robertson. Use the checkbox in the top right to turn sorting on or off.
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Sortable Bar Chart
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| letter | frequency | |
|---|---|---|
| A | .08167 | |
| B | .01492 | |
| C | .02780 | |
| D | .04253 | |
| E | .12702 | |
| F | .02288 | |
| G | .02022 | |
| H | .06094 | |
| I | .06973 | |
| J | .00153 | |
| K | .00747 | |
| L | .04025 | |
| M | .02517 | |
| N | .06749 | |
| O | .07507 | |
| P | .01929 | |
| Q | .00098 | |
| R | .05987 | |
| S | .06333 | |
| T | .09056 | |
| U | .02758 | |
| V | .01037 | |
| W | .02465 | |
| X | .00150 | |
| Y | .01971 | |
| Z | .00074 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; | |
| position: relative; | |
| width: 960px; | |
| } | |
| .axis text { | |
| font: 10px sans-serif; | |
| } | |
| .axis path, | |
| .axis line { | |
| fill: none; | |
| stroke: #000; | |
| shape-rendering: crispEdges; | |
| } | |
| .bar { | |
| fill: steelblue; | |
| fill-opacity: .9; | |
| } | |
| .x.axis path { | |
| display: none; | |
| } | |
| label { | |
| position: absolute; | |
| top: 10px; | |
| right: 10px; | |
| } | |
| </style> | |
| <label><input type="checkbox"> Sort values</label> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var margin = {top: 20, right: 20, bottom: 30, left: 40}, | |
| width = 960 - margin.left - margin.right, | |
| height = 500 - margin.top - margin.bottom; | |
| var formatPercent = d3.format(".0%"); | |
| var x = d3.scale.ordinal() | |
| .rangeRoundBands([0, width], .1, 1); | |
| 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") | |
| .tickFormat(formatPercent); | |
| 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 + ")"); | |
| d3.tsv("data.tsv", function(error, data) { | |
| data.forEach(function(d) { | |
| d.frequency = +d.frequency; | |
| }); | |
| x.domain(data.map(function(d) { return d.letter; })); | |
| y.domain([0, d3.max(data, function(d) { return d.frequency; })]); | |
| 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("Frequency"); | |
| svg.selectAll(".bar") | |
| .data(data) | |
| .enter().append("rect") | |
| .attr("class", "bar") | |
| .attr("x", function(d) { return x(d.letter); }) | |
| .attr("width", x.rangeBand()) | |
| .attr("y", function(d) { return y(d.frequency); }) | |
| .attr("height", function(d) { return height - y(d.frequency); }); | |
| d3.select("input").on("change", change); | |
| var sortTimeout = setTimeout(function() { | |
| d3.select("input").property("checked", true).each(change); | |
| }, 2000); | |
| function change() { | |
| clearTimeout(sortTimeout); | |
| // Copy-on-write since tweens are evaluated after a delay. | |
| var x0 = x.domain(data.sort(this.checked | |
| ? function(a, b) { return b.frequency - a.frequency; } | |
| : function(a, b) { return d3.ascending(a.letter, b.letter); }) | |
| .map(function(d) { return d.letter; })) | |
| .copy(); | |
| svg.selectAll(".bar") | |
| .sort(function(a, b) { return x0(a.letter) - x0(b.letter); }); | |
| var transition = svg.transition().duration(750), | |
| delay = function(d, i) { return i * 50; }; | |
| transition.selectAll(".bar") | |
| .delay(delay) | |
| .attr("x", function(d) { return x0(d.letter); }); | |
| } | |
| }); | |
| </script> |
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