scipy.linalg.lapack.zgeqrt#
- scipy.linalg.lapack.zgeqrt(nb, a, overwrite_a=0) = <flapack function zgeqrt>#
Blocked QR factorization in the compact WY representation (LAPACK
zgeqrt).Qis described by the reflectors left in a together with the block reflectors t, and applied withgemqrt.- Parameters:
- nbint
Block size, at least 1 and no larger than the factorization allows.
- andarray
Matrix of shape
(m, n).- overwrite_aint, optional
If nonzero, a may be overwritten in place. Default is 0.
- Returns:
- andarray
Rin the upper triangle; below it, the reflectors.- tndarray
The upper triangular block reflectors.
- infoint
0 on success; if negative, the
-info-th argument had an illegal value.