adjMatrix function

Adjacency matrix of a graph

Transforms the ``edge matrix'' of a graph into the adjacency matrix.

adjMatrix(A)

Arguments

• A: a square matrix representing the edge matrix of a graph.

Details

Given the edge matrix $A$ of a graph, this can be transformed into an adjacency matrix $E$ with the formula $E = (A-I)^T$.

Returns

• E: the adjacency matrix of the graph.

Author(s)

Giovanni M. Marchetti

See Also

edgematrix

Examples

amat <- DAG(y ~ x+z, z~u+v)
E <- edgematrix(amat)
adjMatrix(E)