random_partition_graph¶

random_partition_graph(sizes, p_in, p_out, seed=None, directed=False)[source]¶

Returns the random partition graph with a partition of sizes.

A partition graph is a graph of communities with sizes defined by s in sizes. Nodes in the same group are connected with probability p_in and nodes of different groups are connected with probability p_out.

Parameters

sizeslist of ints: Sizes of groups
p_infloat: probability of edges with in groups
p_outfloat: probability of edges between groups
directedboolean optional, default=False: Whether to create a directed graph
seedinteger, random_state, or None (default): Indicator of random number generation state. See Randomness.

Returns

GNetworkX Graph or DiGraph: random partition graph of size sum(gs)

Raises

NetworkXError: If p_in or p_out is not in [0,1]

Notes

This is a generalization of the planted-l-partition described in [1]. It allows for the creation of groups of any size.

The partition is store as a graph attribute ‘partition’.

References

1: Santo Fortunato ‘Community Detection in Graphs’ Physical Reports Volume 486, Issue 3-5 p. 75-174. https://arxiv.org/abs/0906.0612

Examples

>>> G = nx.random_partition_graph([10, 10, 10], 0.25, 0.01)
>>> len(G)
30
>>> partition = G.graph["partition"]
>>> len(partition)
3