A multigraph is a graph where edges between nodes can be represented
several times. For some algorithms this causes
problems. duplicatedEdges tests an instance of the
graphNEL class to see if it has duplicated edges and returns
TRUE if it does and FALSE otherwise.
Usage
duplicatedEdges(graph)
Arguments
graph
An instance of the class graphNEL
Value
A logical, either TRUE if the graph has duplicated edges or
FALSE it not.