> If I am computing the betweenness of a vertex that doesn't connect to any
> other node. Shouldn't the betweenness be 0?
Yes, it should. It seems to be the case in a small example that I constructed
now in IPython:
In [1]: g=Graph.Formula("A--B--C--D--A, E, F")
In [2]: g.betweenness()
Out[2]: [0.5, 0.5, 0.5, 0.5, 0.0, 0.0]
So if you are getting non-zero values for isolated nodes then this does not
seem right.
T.
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