An example of a sqrtScale which is particularly useful for sizing circles by area.
From D3 in Depth book by Peter Cook.
Last active
March 12, 2021 15:18
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scaleSqrt example
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| license: gpl-3.0 | |
| height: 90 | |
| border: no |
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"> | |
| <head> | |
| <title>scaleSqrt example</title> | |
| </head> | |
| <style> | |
| body { | |
| font-family: "Helvetica Neue", Helvetica, sans-serif; | |
| font-size: 14px; | |
| color: #333; | |
| } | |
| circle { | |
| fill: #888; | |
| } | |
| </style> | |
| <body> | |
| <svg width="800" height="80"> | |
| <g id="wrapper" transform="translate(40, 40)"> | |
| </g> | |
| </svg> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.2/d3.min.js"></script> | |
| <script> | |
| var linearScale = d3.scaleLinear() | |
| .domain([0, 100]) | |
| .range([0, 700]); | |
| var sqrtScale = d3.scaleSqrt() | |
| .domain([0, 100]) | |
| .range([0, 30]); | |
| var myData = [0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100]; | |
| d3.select('#wrapper') | |
| .selectAll('circle') | |
| .data(myData) | |
| .enter() | |
| .append('circle') | |
| .attr('r', function(d) { | |
| return sqrtScale(d); | |
| }) | |
| .attr('cx', function(d) { | |
| return linearScale(d); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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