/
pop2010-scales_02.html
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pop2010-scales_02.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<style>
body {
font-family: Helvetica, Arial;
}
svg {
width: 500px;
height: 500px;
}
.top-label {
font-size: 13px;
font-style: italic;
text-transform: uppercase;
float: left;
}
.age-label {
text-align: right;
font-weight: bold;
width: 90px;
padding-right: 10px;
}
.clearfix {
clear: both;
}
.bar {
fill: DarkSlateBlue;
}
.bar-label {
text-anchor: end;
}
.axis-label {
text-anchor: middle;
font-size: 13px;
}
</style>
</head>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var popData = [
{age:"80 and up", value:1.6, position:0},
{age:"75-79", value:1.5, position:1},
{age:"70-74", value:2.1, position:2},
{age:"65-69", value:2.6, position:3},
{age:"60-64", value:3.4, position:4},
{age:"55-59", value:4.5, position:5},
{age:"50-54", value:5.1, position:6},
{age:"45-49", value:6.0, position:7},
{age:"40-44", value:6.6, position:8},
{age:"35-39", value:7.1, position:9},
{age:"30-34", value:7.3, position:10},
{age:"25-29", value:8.1, position:11},
{age:"20-24", value:8.9, position:12},
{age:"15-19", value:8.8, position:13},
{age:"10-14", value:8.6, position:14},
{age:"5-9", value:8.8, position:15},
{age:"0-4", value:9.3, position:16}
];
var axisData = [0, 2.5, 5.0, 7.5];
var margin = {top: 30, right: 0, bottom: 0, left: 100},
width = 500 - margin.left - margin.right,
height = 450 - margin.top - margin.bottom;
var barHeight = 20,
barGap = 5,
tickGap = 5,
tickHeight = 10,
barSpacing = barHeight + barGap;
var x = d3.scale.linear()
.domain([0, d3.max(popData, function(element) { return element.value; } ) ] )
.range([0, width]);
var body = d3.select("body");
body.append("h2")
.text("Age distribution of the world, 2010");
body.append("div")
.attr("class", "top-label age-label")
.style("width", margin.left + "px")
.append("p")
.text("age group");
body.append("div")
.attr("class", "top-label")
.append("p")
.text("portion of the population")
body.append("div")
.attr("class", "clearfix");
var svg = body.append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var barGroup = svg.append("g")
.attr("class", "bar");
barGroup.selectAll("rect")
.data(popData)
.enter().append("rect")
.attr("x", 0)
.attr("y", function(d) { return d.position * barSpacing; } )
.attr("width", function(d) { return x(d.value); } )
.attr("height", barHeight);
var barLabelGroup = svg.append("g")
.attr("class", "bar-label");
barLabelGroup.selectAll("text")
.data(popData)
.enter().append("text")
.attr("x", -10)
.attr("y", function (d) { return d.position * barSpacing + barHeight*(2/3); } )
.text(function (d) { return d.age; } );
var axisTickGroup = svg.append("g")
.attr("stroke", "black");
axisTickGroup.selectAll("line")
.data(axisData)
.enter().append("line")
.attr("x1", function (d) { return x(d); } )
.attr("x2", function (d) { return x(d); } )
.attr("y1", 0)
.attr("y2", -tickHeight);
var axisLabelGroup = svg.append("g")
.attr("class", "axis-label");
axisLabelGroup.selectAll("text")
.data(axisData)
.enter().append("text")
.attr("x", function (d) { return x(d); } )
.attr("y", -tickHeight - tickGap)
.text(function (d) { return d + "%"; } );
</script>
</body>
</html>