gRbase (version 1.7-5)

glist2adjMAT: Creates adjacency matrix for a graph from a list of generators

Description

Creates adjacency matrix for a graph from a list of generators. The graph is assumed to be undirected.

Usage

glist2adjMAT(glist, vn = unique(unlist(glist)), result="matrix")
vpaList2adjMAT(glist, vn = unique(unlist(glist)), result="matrix")

Arguments

glist

A list of generators where a generator is a vector of nodes. For glist2adjMAT a vector (v1,...,vn) means that there are undirected edges between all nodes. For vpaList2adjMAT, (v1,...,vn) means that there will be arrows from v2,...,vn to v1.

vn

The names of the vertices in the graphs. These will be the row and column names of the matrix

result

Either "matrix" or "Matrix" (for a sparse matrix representation)

Value

An adjacency matrix (or NULL if glist has length 0)

See Also

ug dag

Examples

glist <- list(1:3,2:4,4:5)
am1 <- glist2adjMAT(glist)
am2 <- vpaList2adjMAT(glist)
if (interactive()){
 plot(as(am1, "graphNEL"))
 plot(as(am2, "graphNEL"))
}