Convert igraph graphs to graphNEL objects from the graph package

The graphNEL class is defined in the graph package, it is another way to represent graphs. These functions are provided to convert between the igraph and the graphNEL objects.

Usage

as_graphnel(graph)

Arguments

graph

An igraph graph object.

Value

as_graphnel() returns a graphNEL graph object.

Details

as_graphnel() converts an igraph graph to a graphNEL graph. It converts all graph/vertex/edge attributes. If the igraph graph has a vertex attribute ‘name’, then it will be used to assign vertex names in the graphNEL graph. Otherwise numeric igraph vertex ids will be used for this purpose.

See also

graph_from_graphnel() for the other direction, as_adjacency_matrix(), graph_from_adjacency_matrix(), as_adj_list() and graph_from_adj_list() for other graph representations.

Other conversion: as.matrix.igraph(), as_adj_list(), as_adjacency_matrix(), as_biadjacency_matrix(), as_data_frame(), as_directed(), as_edgelist(), as_long_data_frame(), graph_from_adj_list(), graph_from_graphnel()

Examples

## Undirected
g <- make_ring(10)
V(g)$name <- letters[1:10]
GNEL <- as_graphnel(g)
g2 <- graph_from_graphnel(GNEL)
g2
#> IGRAPH 95e358e UNW- 10 10 -- Ring graph
#> + attr: name (g/c), mutual (g/l), circular (g/l), name (v/c), weight
#> | (e/n)
#> + edges from 95e358e (vertex names):
#>  [1] a--b a--j b--c c--d d--e e--f f--g g--h h--i i--j

## Directed
g3 <- make_star(10, mode = "in")
V(g3)$name <- letters[1:10]
GNEL2 <- as_graphnel(g3)
g4 <- graph_from_graphnel(GNEL2)
g4
#> IGRAPH 986a1d6 DNW- 10 9 -- In-star
#> + attr: name (g/c), mode (g/c), center (g/n), name (v/c), weight (e/n)
#> + edges from 986a1d6 (vertex names):
#> [1] b->a c->a d->a e->a f->a g->a h->a i->a j->a