| MATLAB Function Reference | |
Replace nonzero sparse matrix elements with ones
Syntax
Description
R = spones(S)
generates a matrix R with the same sparsity structure as S, but with 1's in the nonzero positions.
Examples
c = sum(spones(S)) is the number of nonzeros in each column.
r = sum(spones(S'))' is the number of nonzeros in each row.
sum(c) and sum(r) are equal, and are equal to nnz(S).
See Also
| | spline | spparms | |