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basic waffle chart
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license: mit |
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age | population | |
---|---|---|
<10 | 2704659 | |
10-20 | 4499890 | |
21-30 | 2159981 | |
31-40 | 3853788 | |
41-50 | 14106543 | |
51-60 | 8819342 | |
61-70 | 612463 | |
71-80 | 144320 | |
81-90 | 3730220 | |
>90 | 5234961 |
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta charset="utf-8"> | |
<style> | |
body { | |
font: 18px Arial; | |
} | |
p { | |
margin: 0; | |
} | |
#waffle { | |
margin-bottom: 30px; | |
} | |
#legend { | |
font: 13px Arial; | |
} | |
</style> | |
</head> | |
<body> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<div id="title"> | |
<p>A measure, by age population</p> | |
</div> | |
<div id="waffle"> | |
</div> | |
<div id="legend"> | |
</div> | |
</body> | |
<script> | |
var total = 0; | |
var width, | |
height, | |
widthSquares = 20, | |
heightSquares = 5, | |
squareSize = 25, | |
squareValue = 0, | |
gap = 1, | |
theData = []; | |
var color = d3.scale.category20(); | |
d3.csv("data.csv", function(error, data) | |
{ | |
//total | |
total = d3.sum(data, function(d) { return d.population; }); | |
//value of a square | |
squareValue = total / (widthSquares*heightSquares); | |
//remap data | |
data.forEach(function(d, i) | |
{ | |
d.population = +d.population; | |
d.units = Math.floor(d.population/squareValue); | |
theData = theData.concat( | |
Array(d.units+1).join(1).split('').map(function() | |
{ | |
return { squareValue:squareValue, | |
units: d.units, | |
population: d.population, | |
groupIndex: i}; | |
}) | |
); | |
}); | |
width = (squareSize*widthSquares) + widthSquares*gap + 25; | |
height = (squareSize*heightSquares) + heightSquares*gap + 25; | |
var waffle = d3.select("#waffle") | |
.append("svg") | |
.attr("width", width) | |
.attr("height", height) | |
.append("g") | |
.selectAll("div") | |
.data(theData) | |
.enter() | |
.append("rect") | |
.attr("width", squareSize) | |
.attr("height", squareSize) | |
.attr("fill", function(d) | |
{ | |
return color(d.groupIndex); | |
}) | |
.attr("x", function(d, i) | |
{ | |
//group n squares for column | |
col = Math.floor(i/heightSquares); | |
return (col*squareSize) + (col*gap); | |
}) | |
.attr("y", function(d, i) | |
{ | |
row = i%heightSquares; | |
return (heightSquares*squareSize) - ((row*squareSize) + (row*gap)) | |
}) | |
.append("title") | |
.text(function (d,i) | |
{ | |
return "Age range: " + data[d.groupIndex].age + " | " + d.population + " , " + d.units + "%" | |
}); | |
//add legend with categorical data | |
var legend = d3.select("#legend") | |
.append("svg") | |
.attr('width', 300) | |
.attr('height', 200) | |
.append('g') | |
.selectAll("div") | |
.data(data) | |
.enter() | |
.append("g") | |
.attr('transform', function(d,i){ return "translate(0," + i*20 + ")";}); | |
legend.append("rect") | |
.attr("width", 18) | |
.attr("height", 18) | |
.style("fill", function(d, i) { return color(i)}); | |
legend.append("text") | |
.attr("x", 25) | |
.attr("y", 13) | |
.text( function(d) { return d.age}); | |
//add value of a unit square | |
var legend2 = d3.select("#legend") | |
.select('svg') | |
.append('g') | |
.attr('transform', "translate(100,0)"); | |
legend2.append("text") | |
.attr('y', '14') | |
.attr('font-size', '18px') | |
.text("Total: " + total) | |
.attr("fill", "#444444"); | |
}); | |
</script> | |
</html> |
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