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Force-Directed Parallel Coordinates
license: gpl-3.0
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
<title>Force-Directed Parallel Coordinates</title>
<style type="text/css">
html {
margin: 0;
}
body {
font-family: sans-serif;
font-size: 12px;
background: #fcfcfc;
color: #666;
margin: 12px 0 0 80px;
overflow: hidden;
}
h1 {
font-size: 15px;
margin: 16px;
}
p {
margin: 16px;
}
#chart-left,
#chart-right {
float: left;
}
.link {
stroke: rgba(50,50,50,0.03);
}
.axis line, .axis path {
fill: none;
stroke: #666;
shape-rendering: crispEdges;
}
.axis text {
fill: #666;
text-shadow: 0 1px 0 #fff;
}
text.title {
font-weight: bold;
}
path.node {
fill: none;
}
strong {
color: #222;
font-weight: bold;
}
</style>
</head>
<body>
<div id="chart-left"></div>
<div id="chart-right"></div>
<div style="clear:both;"></div>
<p>The parallel coordinates track the x and y positions of the circles in the force-directed graph.</p>
<p><strong>Click and drag the circles</strong> to see the parallel representation shift.</p>
<p>In SVG, the y axis begins at the top, which is why it's been reversed in parallel coordinates.</p>
</body>
<script src="http://mbostock.github.com/d3/d3.v2.js"></script>
<script src="http://documentcloud.github.com/underscore/underscore.js"></script>
<script src="parallel.js"></script>
</html>
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var width = 400,
height = 400;
var color = d3.scale.category20();
var line = d3.svg.line()
.x(function(d) { return d.x; })
.y(function(d) { return d.y; });
var axis = d3.svg.axis().orient("left");
var x = d3.scale.linear().domain([0,width]).range([width-30,30]),
y = d3.scale.linear().domain([0,height]).range([30,height-30])
groups = d3.scale.linear().domain([0,10]).range([30,height-30]);
var force = d3.layout.force()
.charge(-120)
.linkDistance(30)
.friction(0.8)
.size([width, height]);
var right = d3.select("#chart-right").append("svg")
.attr("width", width)
.attr("height", height);
var left = d3.select("#chart-left").append("svg")
.attr("width", width)
.attr("height", height);
d3.json("miserables.json", function(json) {
force
.nodes(json.nodes)
.links(json.links)
.start();
var lines = left.selectAll("path.node")
.data(json.nodes, function(d) { return d.name })
.enter().append("path")
.attr("class", "node")
.style("stroke", function(d) { return color(d.group); });
// Add an axis and title.
var g = left.selectAll("g.trait")
.data(['x','y','groups'])
.enter().append("svg:g")
.attr("class", "trait")
.attr("transform", function(d,i) { return "translate(" + (40+160*i) + ")"; })
g.append("svg:g")
.attr("class", "axis")
.each(function(d) { d3.select(this).call(axis.scale(window[d])); })
.append("svg:text")
.attr("class", "title")
.attr("text-anchor", "middle")
.attr("y", 12)
.text(String);
var link = right.selectAll("line.link")
.data(json.links)
.enter().append("line")
.attr("class", "link")
.style("stroke-width", function(d) { return Math.sqrt(d.value); });
var circles = right.selectAll("circle.node")
.data(json.nodes, function(d) { return d.name })
.enter().append("circle")
.attr("class", "node")
.attr("r", 5)
.style("fill", function(d) { return color(d.group); })
.on("mouseover", function() {
d3.selectAll("path.node")
.data(d3.select(this).data())
.style("stroke-width", 5)
.style("stroke", function(d) { return color(d.group); });
d3.select(this).attr('r', 12);
})
.on("mouseout", function() {
d3.selectAll("path.node")
.data(d3.select(this).data())
.style("stroke-width", null)
.style("stroke", function(d) { return color(d.group); });
d3.select(this).attr('r', 5);
})
.call(force.drag);
var circles = right.selectAll("circle.node")
.data(json.nodes, function(d) { return d.name })
circles.append("title")
.text(function(d) { return d.name; });
force.on("tick", function() {
lines.attr("d", function(d,i) {
return line([
{x:40, y:x(d.x)},
{x:200, y:y(d.y)},
{x:360, y:groups(d.group)}
]);
});
link.attr("x1", function(d) { return d.source.x; })
.attr("y1", function(d) { return d.source.y; })
.attr("x2", function(d) { return d.target.x; })
.attr("y2", function(d) { return d.target.y; });
circles.attr("cx", function(d) { return d.x; })
.attr("cy", function(d) { return d.y; });
});
});
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