An example of a sqrtScale which is particularly useful for sizing circles by area.
From D3 in Depth book by Peter Cook.
license: gpl-3.0 | |
height: 90 | |
border: no |
An example of a sqrtScale which is particularly useful for sizing circles by area.
From D3 in Depth book by Peter Cook.
<!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> |