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December 10, 2015 08:48
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An example of scales
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
body { | |
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; | |
width: 960px; | |
height: 500px; | |
position: relative; | |
font-weight: 300; | |
} | |
.container { | |
margin-left: 20px; | |
} | |
.controls { | |
margin-top: 10px; | |
} | |
</style> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<div class="container"> | |
<div id="domain"></div> | |
<div id="range"></div> | |
<div class="controls"> | |
<label for="input">Input: </label> | |
<input name="input" type="text" id="input"/> | |
<button type="submit" id="submit">Scale!</button> | |
<div id="output"></div> | |
</div> | |
</div> | |
<script> | |
var scale = d3.scale.linear() | |
// Let's add a domain, a.k.a. what is the input into the scale | |
scale.domain([0, 100]) | |
// Adding a range that will map a number to this output range | |
scale.range([0, 1]) | |
d3.select("#domain") | |
.text("Domain: [" + scale.domain()[0] + ", " + scale.domain()[1] + "]") | |
d3.select("#range") | |
.text("Range: [" + scale.range()[0] + ", " + scale.range()[1] + "]") | |
d3.select("#submit") | |
.on("click", function() { | |
var input = parseInt(d3.select("#input")[0][0].value) | |
var output = scale(input) | |
d3.select("#output") | |
.text("Output: " + output) | |
}) | |
</script> |
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