- double_edge_swap(G, nswap=1, max_tries=100, seed=None)[source]#
Swap two edges in the graph while keeping the node degrees fixed.
A double-edge swap removes two randomly chosen edges u-v and x-y and creates the new edges u-x and v-y:
u--v u v becomes | | x--y x y
If either the edge u-x or v-y already exist no swap is performed and another attempt is made to find a suitable edge pair.
An undirected graph
- nswapinteger (optional, default=1)
Number of double-edge swaps to perform
- max_triesinteger (optional)
Maximum number of attempts to swap edges
- seedinteger, random_state, or None (default)
Indicator of random number generation state. See Randomness.
The graph after double edge swaps.
Gis directed, or If
max_tries, or If there are fewer than 4 nodes or 2 edges in
If the number of swap attempts exceeds
nswapswaps are made
Does not enforce any connectivity constraints.
The graph G is modified in place.