MATLAB Function Reference

sprank - Structural rank

Syntax

r = sprank(A)

Description

r = sprank(A) is the structural rank of the sparse matrix A. For all values of A,

sprank(A) >= rank(full(A))

In exact arithmetic, sprank(A) == rank(full(sprandn(A))) with a probability of one.

Examples

A = [1    0    2    0
     2    0    4    0 ];

A = sparse(A);

sprank(A)

ans =
     2

rank(full(A))

ans =
     1

See Also

dmperm

sprandsym

sprintf