> I am using igraph in R to compute the neighborhood (order 1, i.e. direct
> links) of vertices in a graph. By default, the return values contain the
> seed vertex (i.e. neighbor of order 0). Is there an way to only get the
> order 1 neighbors?
How about this:
> g <- make_ring(10) # just to have an example graph
> induced_subgraph(g, neighbors(g, 2))
If you need it for more than one vertex:
> lapply(c(2,3,4), function(x) { induced_subgraph(g, neighbors(g, x)) })
T.
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