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Bipartite random graphs

Source: R/games.R
sample_bipartite_gnm.Rd

Generate bipartite graphs using the Erdős-Rényi model

Usage

bipartite_gnm(...)

bipartite_gnp(...)

sample_bipartite_gnm(
  n1,
  n2,
  m,
  ...,
  directed = FALSE,
  mode = c("out", "in", "all")
)

sample_bipartite_gnp(
  n1,
  n2,
  p,
  ...,
  directed = FALSE,
  mode = c("out", "in", "all")
)

Arguments

...

Passed to sample_bipartite_gnp().

n1

Integer scalar, the number of bottom vertices.

n2

Integer scalar, the number of top vertices.

m

Integer scalar, the number of edges for \(G(n,m)\) graphs.

directed

Logical scalar, whether to create a directed graph. See also the mode argument.

mode

Character scalar, specifies how to direct the edges in directed graphs. If it is ‘out’, then directed edges point from bottom vertices to top vertices. If it is ‘in’, edges point from top vertices to bottom vertices. ‘out’ and ‘in’ do not generate mutual edges. If this argument is ‘all’, then each edge direction is considered independently and mutual edges might be generated. This argument is ignored for undirected graphs.

p

Real scalar, connection probability for \(G(n,p)\) graphs.

Details

Similarly to unipartite (one-mode) networks, we can define the \(G(n,p)\), and \(G(n,m)\) graph classes for bipartite graphs, via their generating process. In \(G(n,p)\) every possible edge between top and bottom vertices is realized with probability \(p\), independently of the rest of the edges. In \(G(n,m)\), we uniformly choose \(m\) edges to realize.

See also

Random graph models (games) erdos.renyi.game(), sample_(), sample_bipartite(), sample_chung_lu(), sample_correlated_gnp(), sample_correlated_gnp_pair(), sample_degseq(), sample_dot_product(), sample_fitness(), sample_fitness_pl(), sample_forestfire(), sample_gnm(), sample_gnp(), sample_grg(), sample_growing(), sample_hierarchical_sbm(), sample_islands(), sample_k_regular(), sample_last_cit(), sample_pa(), sample_pa_age(), sample_pref(), sample_sbm(), sample_smallworld(), sample_traits_callaway(), sample_tree()

Examples


## empty graph
sample_bipartite_gnp(10, 5, p = 0)
#> IGRAPH f89677a U--B 15 0 -- Bipartite Gnp random graph
#> + attr: name (g/c), p (g/n), type (v/l)
#> + edges from f89677a:

## full graph
sample_bipartite_gnp(10, 5, p = 1)
#> IGRAPH 7fb2783 U--B 15 50 -- Bipartite Gnp random graph
#> + attr: name (g/c), p (g/n), type (v/l)
#> + edges from 7fb2783:
#>  [1]  1--11  1--12  1--13  1--14  1--15  2--11  2--12  2--13  2--14  2--15
#> [11]  3--11  3--12  3--13  3--14  3--15  4--11  4--12  4--13  4--14  4--15
#> [21]  5--11  5--12  5--13  5--14  5--15  6--11  6--12  6--13  6--14  6--15
#> [31]  7--11  7--12  7--13  7--14  7--15  8--11  8--12  8--13  8--14  8--15
#> [41]  9--11  9--12  9--13  9--14  9--15 10--11 10--12 10--13 10--14 10--15

## random bipartite graph
sample_bipartite_gnp(10, 5, p = .1)
#> IGRAPH 5c3fc31 U--B 15 2 -- Bipartite Gnp random graph
#> + attr: name (g/c), p (g/n), type (v/l)
#> + edges from 5c3fc31:
#> [1] 1--13 3--14

## directed bipartite graph, G(n,m)
sample_bipartite_gnm(10, 5, m = 20, directed = TRUE, mode = "all")
#> IGRAPH 4fb1395 D--B 15 20 -- Bipartite Gnm random graph
#> + attr: name (g/c), m (g/n), type (v/l)
#> + edges from 4fb1395:
#>  [1]  4->11  9->11  3->13 10->13  2->14  5->14  6->14 10->14  3->15  7->15
#> [11] 13-> 3 15-> 3 12-> 4 15-> 5 11-> 6 12-> 6 11-> 7 15-> 7 11-> 9 12-> 9