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index.html
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<!DOCTYPE html>
<meta charset="utf-8">
<title>Education at a Glance 2014</title>
<style>
@import url(style.css);
#circle circle {
fill: none;
pointer-events: all;
}
.group path {
fill-opacity: .5;
}
path.chord {
stroke: #000;
stroke-width: .25px;
}
#circle:hover path.fade {
display: none;
}
</style>
<header>
<p> </p>
</header>
<h1>Education at a Glance 2014</h1>
<p>Data: Education at a Glance: OECD 2014 </p>
<p>Built with <a href="http://d3js.org/">d3.js</a>.</p>
<script src="http://d3js.org/d3.v2.min.js?2.8.1"></script>
<script>
var width = 720,
height = 720,
outerRadius = Math.min(width, height) / 2 - 10,
innerRadius = outerRadius - 24;
var formatPercent = d3.format("");
var arc = d3.svg.arc()
.innerRadius(innerRadius)
.outerRadius(outerRadius);
var layout = d3.layout.chord()
.padding(.04)
.sortSubgroups(d3.descending)
.sortChords(d3.ascending);
var path = d3.svg.chord()
.radius(innerRadius);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("id", "circle")
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");
svg.append("circle")
.attr("r", outerRadius);
d3.csv("teams.csv", function(cities) {
d3.json("matrix.json", function(matrix) {
// Compute the chord layout.
layout.matrix(matrix);
// Add a group per neighborhood.
var group = svg.selectAll(".group")
.data(layout.groups)
.enter().append("g")
.attr("class", "group")
.on("mouseover", mouseover);
// Add a mouseover title.
// group.append("title").text(function(d, i) {
// return cities[i].name + ": " + formatPercent(d.value) + " of origins";
// });
// Add the group arc.
var groupPath = group.append("path")
.attr("id", function(d, i) { return "group" + i; })
.attr("d", arc)
.style("fill", function(d, i) { return cities[i].color; });
// Add a text label.
var groupText = group.append("text")
.attr("x", 6)
.attr("dy", 15);
groupText.append("textPath")
.attr("xlink:href", function(d, i) { return "#group" + i; })
.text(function(d, i) { return cities[i].name; });
// Remove the labels that don't fit. :(
groupText.filter(function(d, i) { return groupPath[0][i].getTotalLength() / 2 - 16 < this.getComputedTextLength(); })
.remove();
// Add the chords.
var chord = svg.selectAll(".chord")
.data(layout.chords)
.enter().append("path")
.attr("class", "chord")
.style("fill", function(d) { return cities[d.source.index].color; })
.attr("d", path);
// Add an elaborate mouseover title for each chord.
chord.append("title").text(function(d) {
return cities[d.source.index].name
+ " → " + cities[d.target.index].name
+ ": " + formatPercent(d3.round(d.source.value, 2)) + "%"
+ "\n" + cities[d.target.index].name
+ " → " + cities[d.source.index].name
+ ": " + formatPercent(d3.round(d.target.value, 2)) + "%";
});
function mouseover(d, i) {
chord.classed("fade", function(p) {
return p.source.index != i
&& p.target.index != i;
});
}
});
});
</script>
<footer>
<p>Created by Dr Konstantinos Daras (c) 2014 - Source code available in <a href="https://github.com/gisdarcon/world_circos">GitHub</a></p>
<p>Modified from Mike Bostock's <a href="http://bost.ocks.org/mike/uberdata/">Uber Rides by Neighborhood</a></p>
</footer>