Count the number of isomorphic mappings between two graphs

`count_isomorphisms(graph1, graph2, method = "vf2", ...)`

graph1

The first graph.

graph2

The second graph.

method

Currently only ‘vf2’ is supported, see
`isomorphic`

for details about it and extra arguments.

...

Passed to the individual methods.

Number of isomirphic mappings between the two graphs.

LP Cordella, P Foggia, C Sansone, and M Vento: An improved algorithm
for matching large graphs, *Proc. of the 3rd IAPR TC-15 Workshop
on Graphbased Representations in Pattern Recognition*, 149--159, 2001.

Other graph isomorphism: `count_subgraph_isomorphisms`

,
`graph.count.subisomorphisms.vf2`

;
`graph.get.isomorphisms.vf2`

,
`isomorphisms`

;
`graph.get.subisomorphisms.vf2`

,
`subgraph_isomorphisms`

;
`graph.isoclass`

,
`graph.isoclass.subgraph`

,
`isomorphism_class`

;
`graph.isocreate`

,
`graph_from_isomorphism_class`

;
`graph.isomorphic`

,
`graph.isomorphic.34`

,
`graph.isomorphic.bliss`

,
`graph.isomorphic.vf2`

,
`is_isomorphic_to`

, `isomorphic`

;
`graph.subisomorphic.lad`

,
`graph.subisomorphic.vf2`

,
`is_subgraph_isomorphic_to`

,
`subgraph_isomorphic`

# NOT RUN { # colored graph isomorphism g1 <- make_ring(10) g2 <- make_ring(10) isomorphic(g1, g2) V(g1)$color <- rep(1:2, length = vcount(g1)) V(g2)$color <- rep(2:1, length = vcount(g2)) # consider colors by default count_isomorphisms(g1, g2) # ignore colors count_isomorphisms(g1, g2, vertex.color1 = NULL, vertex.color2 = NULL) # }