File: test_modularity_matrix.R

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r-cran-igraph 1.0.1-1%2Bdeb9u1
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context("modularity_matrix")

test_that("modularity_matrix works", {

  library(igraph)

  kar <- make_graph("zachary")

  fc <- cluster_fast_greedy(kar)

  m1 <- modularity(kar, membership(fc))
  m2 <- modularity(kar, membership(fc), weights=rep(1, ecount(kar)))
  expect_that(m1, equals(m2))
  
  B1 <- modularity_matrix(kar, membership(fc))
  B2 <- modularity_matrix(kar, membership(fc), weights=rep(1, ecount(kar)))

  expect_that(B1, equals(B2))

})