retrieves entries of sparse matrix
[ij,v,mn]=spget(sp)
:sp real, complex or boolean sparse matrix : :ij two columns integer matrix (indices of non-zeros or true
entries)
: :v column vector :
spget is used to convert the internal representation of sparse matrices into the standard ij, v representation.
Non zero entries (or entries set to true for a boolean sparse matrix) of sp are located in rows and columns with indices in ij.
sp=`sparse`_([1,2;4,5;3,10],[1,2,3])
[ij,v,mn]=spget(sp);