spones
Replace nonzero sparse matrix elements with ones
Syntax
R = spones(S)
Description
R = spones(S)generates a matrixRwith the same sparsity structure asS, but with1'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)andsum(r)are equal, and are equal tonnz(S).
Extended Capabilities
Introduced before R2006a
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