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pop2010-D3_3.html
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pop2010-D3_3.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 = [1.6,
1.5,
2.1,
2.6,
3.4,
4.5,
5.1,
6.0,
6.6,
7.1,
7.3,
8.1,
8.9,
8.8,
8.6,
8.8,
9.3];
var axisData = [0, 2.5, 5.0, 7.5],
barLabels = ["80 and up",
"75-79",
"70-74",
"65-69",
"60-64",
"55-59",
"50-54",
"45-49",
"40-44",
"35-39",
"30-34",
"25-29",
"20-24",
"15-19",
"10-14",
"5-9",
"0-4"];
var width = 400,
leftMargin = 100,
topMargin = 30,
barHeight = 20,
barGap = 5,
tickGap = 5,
tickHeight = 10,
scaleFactor = width / popData[16],
barSpacing = barHeight + barGap,
translateText = "translate(" + leftMargin + "," + topMargin + ")",
scaleText = "scale(" + scaleFactor + ",1)";
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", leftMargin + "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");
var barGroup = svg.append("g")
.attr("transform", translateText + " " + scaleText)
.attr("class", "bar");
for (var i = 0; i < popData.length; i++) {
barGroup.append("rect")
.attr("x", 0)
.attr("y", i * barSpacing)
.attr("height", barHeight)
.attr("width", popData[i]);
};
var barLabelGroup = svg.append("g")
.attr("transform", translateText)
.attr("class", "bar-label");
for (var i = 0; i < barLabels.length; i++) {
barLabelGroup.append("text")
.attr("x", -10)
.attr("y", i * barSpacing + barHeight*(2/3))
.text(barLabels[i]);
};
var axisTickGroup = svg.append("g")
.attr("transform", translateText)
.attr("stroke", "black");
var axisLabelGroup = svg.append("g")
.attr("transform", "translate(100,30)")
.attr("class", "axis-label");
for (var i = 0; i < axisData.length; i++) {
axisTickGroup.append("line")
.attr("x1", axisData[i] * scaleFactor)
.attr("x2", axisData[i] * scaleFactor)
.attr("y1", 0)
.attr("y2", -tickHeight);
axisLabelGroup.append("text")
.attr("x", axisData[i] * scaleFactor)
.attr("y", -tickHeight - tickGap)
.text(axisData[i] + "%");
};
</script>
</body>
</html>