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[igraph] degree according to vertex attributes

From: Dominik Santner (CRIE)
Subject: [igraph] degree according to vertex attributes
Date: Fri, 28 Sep 2012 15:21:04 +0200
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/20120907 Thunderbird/15.0.1


I'm using igraph with R and I have an undirected graph including vertex attributes (for example the city of residence). I want to calculate the degree separately for connections to actors living in the same city and those living in any other city.

Example: John lives in Berlin and has 10 friends (degree of 10). 3 of his friends live in Berlin, 3 in Hamburg, 2 in New York and 2 in Munich. I need a result telling me that John has 3 friends in the same city and 7 in any other city.



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