Re: [igraph] prunning vertices

[Matteo Fortini]

Hi,
to delete vertices with degree==0 use

g.delete_vertices(g.vs(_degree=0))

and you could also do

g.delete_vertices(g.vs(name_notin=set(hashtags)))

Note that set() helps a lot to speed up the lookup.

Il 16/01/2015 14:30, Ahmed Abdeen Hamed ha scritto:

Good morning,

I need to prune vertices in a graph based on a certain criteria (not in a given list). When doing so, this leaves isolated vertices, which I also like to remove. But when doing do, delete_vertices() does not remove all vertices with degree == 0. I am not sure why this is happening. 

I am attaching the script and the data that I am using so you can see the issue.

Thanks very much,

-Ahmed

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