You might reserve a special place to render zeroes when using a log axis, since normally these will be displayed at infinity. However, since this represents a discontinuity in the encoding, it’s important to show the discontinuity visually.
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February 9, 2016 02:05
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Log Axis with Zero
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| license: gpl-3.0 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .axis text { | |
| font: 10px sans-serif; | |
| } | |
| .axis path, | |
| .axis line { | |
| fill: none; | |
| stroke: #000; | |
| shape-rendering: crispEdges; | |
| } | |
| </style> | |
| <body> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var margin = {top: 210, right: 20, bottom: 220, left: 60}, | |
| width = 960 - margin.left - margin.right, | |
| height = 500 - margin.top - margin.bottom; | |
| var x = d3.scale.log() | |
| .domain([1e-1, 1e4]) | |
| .range([0, width]); | |
| var x0 = d3.scale.ordinal() | |
| .domain([0]) | |
| .range([-30]); | |
| var xAxis = d3.svg.axis() | |
| .scale(x) | |
| .orient("bottom") | |
| .ticks(20, d3.format(",.1s")); | |
| var x0Axis = d3.svg.axis() | |
| .scale(x0) | |
| .orient("bottom"); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width + margin.left + margin.right) | |
| .attr("height", height + margin.right + margin.bottom) | |
| .append("g") | |
| .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); | |
| svg.append("g") | |
| .attr("class", "x axis") | |
| .call(xAxis); | |
| svg.append("g") | |
| .attr("class", "x-zero axis") | |
| .call(x0Axis); | |
| </script> |
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