I'm using the force layout to represent a directed unweighted network. My inspiration comes from the following example: http://bl.ocks.org/mbostock/1153292

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I tried to make nodes of different sizes, but I have a little problem. The marker used to draw the arrow on each link points to the center of the circle. If the circle is too big it covers completely the arrow.

How can I handle this?

d3.js force-layout
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