Skip to content

Instantly share code, notes, and snippets.

@mbostock mbostock/.block
Last active Feb 8, 2016

Embed
What would you like to do?
Grouped Bar Chart
license: gpl-3.0
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.axis text {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.x.axis path {
display: none;
}
</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>
var n = 20, // number of samples
m = 4; // number of series
var data = d3.range(m).map(function() { return d3.range(n).map(Math.random); });
var margin = {top: 20, right: 30, bottom: 30, left: 40},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var y = d3.scale.linear()
.domain([0, 1])
.range([height, 0]);
var x0 = d3.scale.ordinal()
.domain(d3.range(n))
.rangeBands([0, width], .2);
var x1 = d3.scale.ordinal()
.domain(d3.range(m))
.rangeBands([0, x0.rangeBand()]);
var z = d3.scale.category10();
var xAxis = d3.svg.axis()
.scale(x0)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("svg:g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
svg.append("g")
.attr("class", "y axis")
.call(yAxis);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g").selectAll("g")
.data(data)
.enter().append("g")
.style("fill", function(d, i) { return z(i); })
.attr("transform", function(d, i) { return "translate(" + x1(i) + ",0)"; })
.selectAll("rect")
.data(function(d) { return d; })
.enter().append("rect")
.attr("width", x1.rangeBand())
.attr("height", y)
.attr("x", function(d, i) { return x0(i); })
.attr("y", function(d) { return height - y(d); });
</script>
@djjr

This comment has been minimized.

Copy link

commented May 10, 2013

Is there a logic that eludes me on why "y" is used for horizontal and "x" for vertical in this snippet?

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.