Extracts a named membership vector from a communities result.
Works with both cograph_communities data frames and
igraph communities objects.
Examples
g <- igraph::make_graph("Zachary")
comm <- community_louvain(g)
membership(comm)
#> 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
#> 1 1 1 1 2 2 2 1 3 3 2 1 1 1 3 3 2 1 3 1 3 1 3 3 4 4
#> 27 28 29 30 31 32 33 34
#> 3 3 4 3 3 4 3 3
