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Last active December 25, 2015 17:09
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d3js: d3.nest() and filter() using Select box and svg circles.
Raw
README.md

d3js: d3.nest() and filter() using Select box and svg circles.

Raw
index.html
<!DOCTYPE html>
<meta charset='utf-8'>
<html>
<head>
<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<link rel='stylesheet' href='style.css'>
</head>
<body>
<script type='text/javascript' src='script.js'></script>
</body>
</html>
Raw
script.js
var data = [
{
"color" : "red",
"cx" : 25,
"cy" : 25,
"r" : 10
},
{
"color" : "green",
"cx" : 55,
"cy" : 55,
"r" : 20
},
{
"color" : "blue",
"cx" : 75,
"cy" : 75,
"r" : 30
}
]
var dataNested = d3.nest()
.key(function (d) { return d.color; })
.entries(data)
d3.select('body').append('div')
.append('select')
.on('change',change)
.selectAll('option')
.data(dataNested)
.enter()
.append('option')
.attr('value',function (d) { return d.key })
.text(function (d) { return d.key })
var dataFiltered = dataNested.filter(function (d) { return d.key === 'red' })
var svg = d3.select('body').append('svg')
.attr('height',150)
.attr('width',150)
var circles = svg.selectAll('circle')
.data(dataFiltered[0].values)
circles.enter()
.append('circle')
.attr('cx', function (d) { return d.cx })
.attr('cy', function (d) { return d.cy })
.attr('r', function (d) { return d.r })
.attr('fill', function (d) { return d.color })
function change() {
var value = this.value
dataFiltered = dataNested.filter(function (d) { return d.key === value })
circles.data(dataFiltered[0].values)
.transition().duration(1000)
.attr('cx', function (d) { return d.cx })
.attr('cy', function (d) { return d.cy })
.attr('r', function (d) { return d.r })
.attr('fill', function (d) { return d.color })
}
Raw
style.css
/* CSS Here
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