getAdjacencyMatrix: Return a Graph's Adjacency Matrix
Description
This generic function returns the adjacency matrix of a graph. Non-null elements denote
that an edge exists between the nodes corresponding to the row and column index.
Usage
getAdjacencyMatrix(g, ...)
Arguments
g
An object of a suitable class.
...
Some methods for this generic function may take
additional, optional arguments. At present none do.
Value
Returns a square-matrix where non-null elements denote the existence of edges in the graph.