Compute modularity for an arbitrary partition.

Compute modularity for an arbitrary partition.

Usage

modularity_score(g, membership, verbose = FALSE)

Arguments

g

an igraph object (undirected, simple).

membership

integer vector of 1-based community ids, length `vcount(g)`.

verbose

logical; emit a cli trace.

Value

scalar modularity Q.

Examples

g <- igraph::make_graph("Zachary")
cl <- igraph::cluster_louvain(g)
modularity_score(g, igraph::membership(cl))
#> [1] 0.4197896