Using Unicode superscripts to format ticks for a natural-log y-scale.
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November 15, 2017 16:28
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Natural Log Scale
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| license: gpl-3.0 |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .line { | |
| fill: none; | |
| stroke: steelblue; | |
| stroke-width: 1.5px; | |
| } | |
| .axis--x text { | |
| font: 10px sans-serif; | |
| } | |
| .axis--y text { | |
| font: oblique 15px Georgia, 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 superscript = "⁰¹²³⁴⁵⁶⁷⁸⁹", | |
| formatPower = function(d) { return (d + "").split("").map(function(c) { return superscript[c]; }).join(""); }; | |
| var margin = {top: 40.5, right: 40.5, bottom: 50.5, left: 60.5}, | |
| width = 960 - margin.left - margin.right, | |
| height = 500 - margin.top - margin.bottom; | |
| var x = d3.scale.linear() | |
| .domain([0, 100]) | |
| .range([0, width]); | |
| var y = d3.scale.log() | |
| .base(Math.E) | |
| .domain([Math.exp(0), Math.exp(9)]) | |
| .range([height, 0]); | |
| var xAxis = d3.svg.axis() | |
| .scale(x) | |
| .orient("bottom"); | |
| var yAxis = d3.svg.axis() | |
| .scale(y) | |
| .orient("left") | |
| .tickFormat(function(d) { return "e" + formatPower(Math.round(Math.log(d))); }); | |
| var line = d3.svg.line() | |
| .x(function(d) { return x(d[0]); }) | |
| .y(function(d) { return y(d[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 + ")"); | |
| svg.append("g") | |
| .attr("class", "axis axis--y") | |
| .attr("transform", "translate(-10,0)") | |
| .call(yAxis); | |
| svg.append("g") | |
| .attr("class", "axis axis--x") | |
| .attr("transform", "translate(0," + (height + 10) + ")") | |
| .call(xAxis); | |
| svg.append("path") | |
| .datum(d3.range(100).map(function(x) { return [x, x * x + x + 1]; })) | |
| .attr("class", "line") | |
| .attr("d", line); | |
| </script> |
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