Hello,

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.

Thanks

Dominik

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