random_lobster¶

random_lobster(n, p1, p2, seed=None)[source]¶

Return a random lobster.

A lobster is a tree that reduces to a caterpillar when pruning all leaf nodes.

A caterpillar is a tree that reduces to a path graph when pruning all leaf nodes (p2=0).

Parameters :

n : int

The expected number of nodes in the backbone

p1 : float

Probability of adding an edge to the backbone

p2 : float

Probability of adding an edge one level beyond backbone

seed : int, optional

Seed for random number generator (default=None).