
From:  Ahmed Abdeen Hamed 
Subject:  Re: [igraph] how to add disconnected nodes to a graph? 
Date:  Sat, 7 Dec 2013 21:41:02 0500 
> I misspoke, I meant closenessCloseness is different; an isolated vertex will have a closeness centrality of 1/n where n is the number of vertices. This is due to how igraph defines closeness centrality for disconnected graphs: when two nodes are disconnected, igraph assumes that their distance is n because we cannot use infinity for obvious reasons, and n is always larger than the longest possible geodesic in a network so it sort of makes sense.
T.
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