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[igraph] triad.census(): negative 003 counts

From: Wagner, Stefan
Subject: [igraph] triad.census(): negative 003 counts
Date: Wed, 28 May 2014 16:59:37 +0000

I am using triad.census to conduct a triad.census on vast networks constituted by references. The census is done for time/area subsamples of the whole reference networks so that I end up running 900 different triad.censuses. The number of nodes in each of the sub-networks can get up to 20,000 nodes.


In the results I get from this exercise, the count of the 003-triads (null triads) are often negative. I am not sure what causes this negative count. In principle, everything seems to be right as I cross-checked a small samples of the 900 censuses I did with results from Pajek – and the number are equivalent except the negative 003-triad counts.


Is there any explanation to this phenomenon? Any hint is welcome!






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