This function creates a matrix whose columns correspond to the edges of the nonincidence graph of a slack matrix. They are ordered by variable index. The first n rows correspond to rows of the slack matrix (vertices/ground set elements) and the remaining rows correspond to columns of the slack matrix (facets/hyperplanes).



If S is not a symbolic slack matrix, the columns of A will be ordered assuming edges are listed in order by rows of S (as in symbolicSlackMatrix).
The object graphFromSlackMatrix is a method function.