"source" and "target" Properties in Edge about d3-network

[aaronkw]

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[dongbohu]

Sorry, I submitted the issue by accident before I finished it. I have updated it.

[aaronkw]

I see your point! So actually I did this to follow the d3 convention. According to the documentation, the values of 'source' and 'target' may be initialized with the index of the node in the node array (and in fact our backend remaps the ids to accommodate this):

Note: the values of the source and target attributes may be initially specified as indexes into the nodes array; these will be replaced by references after the call to start. Link objects may have additional fields that you specify; this data can be used to compute link strength and distance on a per-link basis using an accessor function.

Reference

The d3 force layout code actually does this exact binding:

      for (i = 0; i < m; ++i) {
        o = links[i];
        if (typeof o.source == "number") o.source = nodes[o.source];
        if (typeof o.target == "number") o.target = nodes[o.target];
        ++o.source.weight;
        ++o.target.weight;
      }

I bind the nodes explicitly because I need it before the force layout.

[aaronkw]

Also, note that the only thing you would have to change is this:

genes_in = [ { id: 123, name: "foo" }, { id: 456, name: "bar" } ];
edges_in = [ { source: 0, target: 1, weight: 3.14} ];

[dongbohu]

I got it. Thank you very much for the clarification.