hello guys, this question is more d3 centric than neo4j based. I copied the
example from neo4j website for visualization and it does not seem to work.
I am using latest version of d3.js to prototype visualization using neo4j.
Error seems to be from d3.js library itself
Uncaught TypeError: Cannot read property 'weight' of undefined d3.min.js:4
here is the code i copied from neo4j site ("dependencyManager" is the id of
svg element)
res =
{"nodes":[{name:"Peter",label:"Person",id:1},{name:"Michael",label:"Person",id:2},
{name:"Neo4j",label:"Database",id:3}],
"links":[{start:0, end:1, type:"KNOWS", since:2010},{start:0, end:2,
type:"FOUNDED"},
{start:1, end:2, type:"WORKS_ON"}]};
var graph =
{"nodes":[{name:"Peter",label:"Person",id:1},{name:"Michael",label:"Person",id:2},
{name:"Neo4j",label:"Database",id:3}],
"links":[{start:0, end:1, type:"KNOWS", since:2010},{start:0, end:2,
type:"FOUNDED"},
{start:1, end:2, type:"WORKS_ON"}]};
var width = 800, height = 800;
// force layout setup
var force = d3.layout.force()
.charge(-200).linkDistance(30).size([width, height]);
// setup svg div
var svg = d3.select("#dependencyManager")
.attr("width", "100%").attr("height", "100%")
.attr("pointer-events", "all");
// load graph (nodes,links) json from /graph endpoint
force.nodes(graph.nodes).links(graph.links).start();
// render relationships as lines
var link = svg.selectAll(".link")
.data(graph.links).enter()
.append("line").attr("class", "link");
// render nodes as circles, css-class from label
var node = svg.selectAll(".node")
.data(graph.nodes).enter()
.append("circle")
.attr("class", function (d) { return "node "+d.label })
.attr("r", 10)
.call(force.drag);
// html title attribute for title node-attribute
node.append("title")
.text(function (d) { return d.title; })
// force feed algo ticks for coordinate computation
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; });
});
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