I made this scale with Michael Keller at coffee shop in Brooklyn. It was supposed to take just a few minutes, as a kind of warm up exercise to coding, but consumed practically the entire afternoon.
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Centigrade to Fahrenheit
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| license: cc-by-4.0 |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Centigrade to Fahrenheit</title> | |
| <meta charset="UTF-8"> | |
| <style type="text/css"> | |
| body { | |
| margin: 0; | |
| } | |
| .band { | |
| stroke: #fff; | |
| stroke-width: 0.5px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script src="https://d3js.org/d3.v4.min.js" charset="utf-8"></script> | |
| <script src="https://d3js.org/d3-scale-chromatic.v1.min.js"></script> | |
| <script type="text/javascript"> | |
| 'use strict'; | |
| var width = 960, height = 500, | |
| margin = { top: 40, bottom: 40, left: 20, right: 20 }, | |
| start = -60, finish = 110, | |
| interval = 10 | |
| var c2f = d3.scaleLinear() | |
| .domain([-40, 0]) | |
| .range([-40, 32]); | |
| var values = d3.range(start, finish, interval) | |
| var color = d3.scaleLinear() | |
| .domain([start, 0, finish]) | |
| .range(['#66c', '#fff', '#c66']) | |
| var color = d3.scaleSequential(d3.interpolateRdBu) | |
| .domain([finish, start]) | |
| var svg = d3.select('body').append('svg') | |
| .attr('width', width) | |
| .attr('height', height) | |
| .append('g') | |
| .attr('transform', 'translate(' + [margin.left, margin.top] + ')'); | |
| width -= margin.left + margin.right; | |
| height -= margin.top + margin.bottom; | |
| var scale = d3.scaleLinear() | |
| .domain([ | |
| c2f(values[0]), | |
| c2f(values[values.length-1]+interval) | |
| ]) | |
| .range([0, width]); | |
| var cband = scale(interval) - scale(0); | |
| var fband = scale(c2f(interval)) - scale(c2f(0)); | |
| var axis = d3.axisTop(scale) | |
| .tickFormat(function(d) { return d + '°C'}); | |
| svg.append('g') | |
| .attr('class', 'axis') | |
| .attr('transform', 'translate(0 ' + -1 + ')') | |
| .call(axis); | |
| axis = d3.axisBottom(scale) | |
| .tickFormat(function(d) { return d + '°F'}); | |
| svg.append('g') | |
| .attr('class', 'axis') | |
| .attr('transform', 'translate(0 ' + height + ')') | |
| .call(axis); | |
| svg.selectAll('.band') | |
| .data(values) | |
| .enter() | |
| .append('path') | |
| .attr('class', 'band') | |
| .style('fill', color) | |
| .attr('d', function(d) { | |
| return [ | |
| 'M', scale(d), 0, | |
| ' h', cband, | |
| ' L', scale(c2f(d)) + fband, height, | |
| ' h', -fband, | |
| ' z' | |
| ].join(' ') | |
| }) | |
| </script> | |
| </body> | |
| </html> |
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