Simple Bar and XY line graph in D3.JS
A basic bargraph, as simple as it can be made, largely hacked from various tutorials. It looks like this:
<html>
<body>
<svg class="output" width="500" height="500">
</svg>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var svg = d3.select(".output")
var mydata = [127, 61, 256, 71];
var selection = svg.selectAll("rect")
.data(mydata)
selection.enter().append("rect")
.attr("x", 0)
.attr("y", function(d,i) { return i*90+50 })
.attr("width", function(d,i) { return d; })
.attr("height", 20)
.style("fill", "steelblue")
</script>
</body>
</html>
The linegraph looks like this:
And is again as simple as I could get it. The data contains no X axis coordinate, and is just a flat array. In order to plot this a function provided to D3 infers the X axis from the datapoints index.
<html>
<style>
path {
stroke: steelblue;
stroke-width: 2;
fill: none; //important
}
</style>
<body>
<svg class="output" width="500" height="500">
</svg>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var svg = d3.select(".output")
var mydata = [127, 61, 256, 71, 10,10,10,10,10,10,100];
var selection = svg.selectAll("line")
.data(mydata)
var valueline = d3.svg.line()
.x(function(d,i) { return i*10; })
.y(function(d,i) { return d; });
selection.enter().append("path")
.attr("class", "line")
.attr("d", valueline(mydata))
</script>
</body>
</html>
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