ug2dag: Coerce between undirected and directed graphs when possible
Description
An undirected graph G can be converted to a dag if G
is chordal. A dag D can be converted to an undirected graph if
D can be moralized without adding edges.
Usage
ug2dag(gn)
Arguments
gn
A graphNEL object or an object that can be converted to a
graphNEL object.