I am trying to adapt a simple scatterplot program in D3 to accept a CSV file. When I use the data in the file it works just fine, but when I try to load the CSV file it simply won't work. Is there something simple I am missing? The contents of the CSV file "datatest.csv" are the same as the dataset in the code. I have checked that the browser is loading the data, and it seems to all be there. I figure I'm simply missing a step.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>D3 Demo: Linear scales</title>
<script type="text/javascript" src="../d3/d3.v3.js"></script>
<style type="text/css">
/* No style rules here yet */
</style>
</head>
<body>
<script type="text/javascript">
//Width and height
var w = 900;
var h = 500;
var padding = 20;
var dataset = [];
// var dataset = [
// [5, 20], [480, 90], [250, 50], [100, 33], [330, 95],
// [410, 12], [475, 44], [25, 67], [85, 21], [220, 88],
// [600, 150]
// ];
d3.csv("datatest.csv", function(data) {
dataset=data
});
//Create scale functions
var xScale = d3.scale.linear()
.domain([0, d3.max(dataset, function(d) { return d[0]; })])
.range([padding, w - padding * 2]);
var yScale = d3.scale.linear()
.domain([0, d3.max(dataset, function(d) { return d[1]; })])
.range([h - padding, padding]);
var rScale = d3.scale.linear()
.domain([0, d3.max(dataset, function(d) { return d[1]; })])
.range([2, 5]);
//Create SVG element
var svg = d3.select("body")
.append("svg")
.attr("width", w)
.attr("height", h);
svg.selectAll("circle")
.data(dataset)
.enter()
.append("circle")
.attr("cx", function(d) {
return xScale(d[0]);
})
.attr("cy", function(d) {
return yScale(d[1]);
})
.attr("r", function(d) {
return rScale(d[1]);
});
</script>
</body>
</html>
This is the content of the CSV file:
x-coordinate, y-coordinate
5,20
480,90
250,50
100,33
330,95
410,12
475,44
25,67
85,21
220,88
600,150
