09_scales.html

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>D3: various scales</title>
		
<head><style>
body{margin:0px;}
svg {
  //border: solid 1px #666;
  overflow: hidden;
}

path {
  fill: yellow;
  stroke: #000;
  stroke-width: .5px;
}

circle {
  fill: #ccc;
  stroke: #000;
  pointer-events: none;
}

p {font: 48px "Sans Serif" ;margin-left:36px;}
select {font: 24px "Sans Serif";margin-left:36px;}
</style></head>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<div id="chart" style="width:1280px;height:620px"></div>
<select>
  <option value="linear">Linear</option>
  <option value="sqrt">Square root</option>
  <option value="log">Logarithmic</option>
  <option value="pow">Power scale (square)</option>
</select>

<p>Scales</hp>
<script>
var width = 1280,
    height = 620;

var points=d3.range(0,1.01,.01);

var x=d3.scale.linear().range([10,width-10]);

var moveCircle;

var lines = {linear:d3.svg.line()
    .x(x).interpolate("basis")
    .y(d3.scale.linear().range([height-50,50])),
    sqrt:d3.svg.line()
    .x(x).interpolate("basis")
    .y(d3.scale.sqrt().range([height-50,50])),
    pow:d3.svg.line()
    .x(x).interpolate("basis")
    .y(d3.scale.pow().exponent(2).range([height-50,50])),
    log:d3.svg.line()
    .x(x).interpolate("basis")
    .y(function(d) {return d3.scale.log().range([height-50,50])(d*9+1)})}

var svg = d3.select("#chart")
  .append("svg")
    .attr("width", width)
    .attr("height", height)

svg.append("path").attr("d","M10,50v"+(height-100)+"h"+(width-20)).style("stroke","black").style("stroke-width",.25).style("fill","none")


svg.selectAll(".curve").data([points])
  .enter().append("path").classed("curve",1)
    .style("fill","none").style("stroke-width",3)
    .style("stroke","black")
    .attr("d", lines.linear);


d3.select("select").on("change",function() {d3.select(".curve").transition().attr("d",lines[d3.select(this).property("value")])})


</script>


</body>

</html>