Given column vectors I, J, and V, one can construct a sparse matrix using the following syntax:
sparse(I, J, V) How about the reverse? I.e., given a sparse matrix S, is there a function which returns the column vectors I, J, and V that define S? One can obtain the list of nonzero values V with the command nonzeros(S) but I'm not sure how to get the row and column coordinates I and J that go along with V. Is there a convenient way to obtain I and J?
