Drawing multiple edges between two nodes with d3

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In fact, the original visualization is a prime example of one method to show multiple links between nodes, that is – using arcs rather than direct paths, so you can see both incoming and outgoing links.

This concept can be extended to show multiple of each of these types of links by changing the radius values of subsequent svg path(arc) elements representing the link. A basic example being

dr = 75/d.linknum;

Where d.linknum represents the number of the successive link. dr is later used as the rx and ry amounts for the arc being drawn.

Full implementation here: http://jsfiddle.net/7HZcR/3/

enter image description here

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