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duplication_divergence_graph

duplication_divergence_graph(n, p, seed=None)

Returns an undirected graph using the duplication-divergence model.

A graph of n nodes is created by duplicating the initial nodes and retaining edges incident to the original nodes with a retention probability p.

Parameters:

• n (int) – The desired number of nodes in the graph.
• p (float) – The probability for retaining the edge of the replicated node.
• seed (int, optional) – A seed for the random number generator of random (default=None).

Returns:

G

Return type:

Graph

Raises:

NetworkXError – If \(p\) is not a valid probability. If \(n\) is less than 2.

References

[1]	I. Ispolatov, P. L. Krapivsky, A. Yuryev, “Duplication-divergence model of protein interaction network”, Phys. Rev. E, 71, 061911, 2005.