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ch7-3.html
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ch7-3.html
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<html>
<head>
<title>NYC Budget</title>
<meta name="description" content="Practical D3">
<meta name="author" content="Tarek Amr, @gr33ndata">
</head>
<style>
</style>
<body>
</body>
<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script type="text/javascript">
// Budget data (nybudget) source:
// http://www.nyc.gov/html/omb/downloads/pdf/fp6_15.pdf
var nybudget = {
'name': 'NYC Budget 2015' , 'children': [
{'name': 'Personal Services', 'children': [
{'name': 'Salaries and Wages', 'value': 24023},
{'name': 'Pensions', 'value': 8621},
{'name': 'Fringe Benefits', 'value': 8635},
{'name': 'Retiree Health Benefits', 'value': 955},
]
},
{'name': 'Other Services', 'children': [
{'name': 'Medical Assistance', 'value': 6275},
{'name': 'Public Assistance', 'value': 1472},
{'name': 'All Other ', 'value': 25149},
]
},
{'name': 'Debt Service', 'value': 5971},
]
};
var w= 400, h = 400;
var margin = 20;
var svg = d3.select('body').append('svg')
.style("background", "#FFF")
.attr('width', w+2*margin)
.attr('height', h+2*margin);
// You can use preset colors:
// var colours = d3.scale.category10();
// But, I'd rather use my own colors this time
var colours = d3.scale.ordinal().range(["#d9d9d9","#74c476","#6baed6","#9e9ac8"]);
// Using partition layout
var partition = d3.layout.partition();
// Try changing values for domains
var radiusScale = d3.scale.linear()
.domain([0, 1])
.range([80, Math.min(w,h)/2]);
var angleScale = d3.scale.linear()
.domain([0, 1])
.range([0.5*Math.PI, 2*Math.PI]);
var arc = d3.svg.arc()
.innerRadius(function(d){
return radiusScale(d.y);
})
.outerRadius(function(d){
return radiusScale(d.y+d.dy);
})
.startAngle(function(d){
return angleScale(d.x);
})
.endAngle(function(d){
return angleScale(d.x+d.dx);
});
svg.selectAll("path")
.data(partition(nybudget))
.enter()
.append("path")
.attr("d", arc)
.attr("fill", function(d,i){
if (d.depth < 2){
return colours(d.name);
} else {
return colours(d.parent.name);
}
})
.attr("stroke", "#FFFFFF")
.attr("stroke-width", "4px")
.on("click", function(d,i){
console.log(d.name);
})
.attr("transform", "translate("+(margin+w/2)+","+(margin+h/2)+")");
</script>
<html>