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nodeTutorial.html
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nodeTutorial.html
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<!DOCTYPE html>
<html>
<meta charset="utf-8">
<!--<head>-->
<style>
.node {
stroke: #fff;
stroke-width: 1.5px;
}
.link {
stroke: #999;
stroke-opacity: 0.6;
}
</style>
<!--</head>-->
<body>
<script src="d3.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);
//main function is within the d3 call to open the src file
d3.json("my5000Entries.json", function(error, graph){
if (error) throw error;
force.nodes(graph.nodes).links(graph.links).start();
var link = svg.selectAll(".link")
.data(graph.links)
.enter().append("line")
.attr("class", "link")
.style("stroke-width", function(d){
return Math.sqrt(d.occurs); //value, perform operations on number of occurrences
});
var node = svg.selectAll(".node")
.data(graph.nodes)
.enter().append("circle")
.attr("class", "node")
.style("fill", function(d){
return color(d.race_ethn); //group, color of what?
})
.call(force.drag);
node.append("title").text(function(d){
return d.node_ID; //name
});
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>
</body>
</html>