ggm (version 2.2)

unmakeMG: Loopless mixed graphs components

Description

Splits the adjacency matrix of a loopless mixed graph into three components: directed, undirected and bi-directed.

Usage

unmakeMG(amat)

Arguments

amat

a square matrix, with dimnames, representing a loopless mixed graph. The matrix consists of 4 different integers as an $ij$-element: 0 for a missing edge between $i$ and $j$, 1 for an arrow from $i$ to $j$, 10 for a full line between $i$ and $j$, a

Value

• It is the inverse of makeAG. It returns the following components.
• dg
  the adjacency matrix of the directed edges.
• ug
  the adjacency matrix of the undirected edges.
• bg
  the adjacency matrix of the bi-directed edges.

Details

The matrices ug, and bg are just symmetric Boolean matrices.

See Also

makeMG

Examples

ag <- makeMG(ug=UG(~y0*y1), dg=DAG(y4~y2, y2~y1), bg=UG(~y2*y3+y3*y4))  
isAG(ag)
unmakeMG(ag)