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[igraph] Alpha Centrality Function Crashes

From: Judd Antin
Subject: [igraph] Alpha Centrality Function Crashes
Date: Thu, 24 Apr 2008 08:37:10 -0700
User-agent: Thunderbird (Windows/20080213)

Hi all,

I've been using igraph in R to look at a a very large, sparse directed network of about 58,000 nodes and 87,000 edges. I am interested in calculating alpha centrality scores, but the alpha.centrality function crashes R for me instantaneously. I've tried this on both Windows and Mac builds of the library (in case of a platform dependent issue), with the same results.

Does anyone have any insight on how I could get this to work? Is the size of the network simply too large? I also noticed in the manual that 'singular adjacency matrices' can cause problems for the algorithm, but I'm not sure what a 'singular adjacency matrix' is.

Any advice appreciated.



Judd Antin
School of Information
University of California Berkeley
web: http://technotaste.com
blog: http://technotaste.com/blog

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