rowspace(A)
Returns a matrix such that its rows span the row space of matrix A.
See also columnspace nullspace
Example
a = ( 1, 2, 3, 5 ; 2, 3, -2, 1 )
1 2 3 5
2 3 -2 1
rowspace(a)
1 0 -13 -13
0 1 8 9