On Sun, Feb 13, 2011 at 1:21 PM, Tamás Nepusz
<address@hidden> wrote:
> I get an alpha = 2.8 , which is different from the power I used in building the graph. Does anyone have any explanation for this?
The power argument does not specify the alpha exponent of the degree distribution; it specifies the exponent used when igraph determines the attachment probabilities after a new vertex is added. power=1 corresponds to linear preferential attachment, which should indeed correspond to alpha = 3 in the infinite limit, so the value of 2.8 you get seems to be correct.
--
Tamas
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