transClos {ggm}

Transitive closure of a graph

Description

Computes the transitive closure of a graph (undirected or directed acyclic).

Usage

transClos(amat)

Arguments

amat

a Boolean matrix with dimnames representing the adjacency matrix of a graph.

Details

The transitive closure of a directed graph with adjacency matrix A is a graph with adjacency matrix A^* such that A^*_{i,j} = 1 if there is a directed path from i to j. The transitive closure of an undirected graph is defined similarly (by substituting path to directed path).

Value

A

The adjacency matrix of the transitive closure.

Author(s)

Giovanni M. Marchetti

See Also

DAG, UG

Examples

## Closure of a DAG
d <- DAG(y ~ x, x ~ z)
transClos(d)

## Closure of an UG
g <- UG(~ x*y*z+z*u+u*v)
transClos(g)