This fork is to illustrate an answer to the following question on StackOverflow: http://stackoverflow.com/questions/15048885/cannot-read-property-weight-of-undefined-in-d3-force-implementation
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Force directed graph with non-formated data.
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
.node { | |
stroke: #fff; | |
stroke-width: 1.5px; | |
} | |
.link { | |
stroke: #999; | |
stroke-opacity: .6; | |
} | |
</style> | |
<body> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script> | |
<script> | |
var width = 960, | |
height = 500; | |
var color = d3.scale.category20(); | |
var force = d3.layout.force() | |
.charge(-120) | |
.linkDistance(30) | |
.size([width, height]); | |
var svg = d3.select("body").append("svg") | |
.attr("width", width) | |
.attr("height", height); | |
d3.json("papers.json", function(my_data) { | |
// I use jQuery.map() to reformat the data as I want | |
var my_nodes = $.map(d3.range(100), function(d){return {"name": d};}); | |
var my_links = $.map(my_data, function(d){return {"source": d.authorA, "target": d.authorB, "value":d.paperCount, "origin": d};}); | |
force | |
.nodes(my_nodes) | |
.links(my_links) | |
.start(); | |
var link = svg.selectAll(".link") | |
.data(my_links) | |
.enter().append("line") | |
.attr("class", "link") | |
var node = svg.selectAll(".node") | |
.data(my_nodes) | |
.enter().append("circle") | |
.attr("class", "node") | |
.attr("r", 5) | |
.style("fill", function(d) { return "red"; }) | |
.call(force.drag); | |
force.on("tick", function() { | |
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; }); | |
node.attr("cx", function(d) { return d.x; }) | |
.attr("cy", function(d) { return d.y; }); | |
}); | |
}); | |
</script> |
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[ | |
{"paperCount": 1, "PMIDs": [20626970], "authorA": 79, "authorB": 80}, | |
{"paperCount": 1, "PMIDs": [20492581], "authorA": 81, "authorB": 82}, | |
{"paperCount": 1, "PMIDs": [20492581], "authorA": 81, "authorB": 83}, | |
{"paperCount": 1, "PMIDs": [20492581], "authorA": 81, "authorB": 84}, | |
{"paperCount": 1, "PMIDs": [20492581], "authorA": 82, "authorB": 83}, | |
{"paperCount": 1, "PMIDs": [20492581], "authorA": 82, "authorB": 84}, | |
{"paperCount": 1, "PMIDs": [20492581], "authorA": 83, "authorB": 84} | |
] |
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