scipy.linalg.lapack.cungrq

scipy.linalg.lapack.cungrq(a, tau, lwork=3 * m, overwrite_a=0) = <flapack function cungrq>

Generate the orthogonal/unitary factor Q of a RQ factorization (LAPACK cungrq).

Parameters:

andarray

The factorization the matching gerqf returned.

taundarray

Reflector scalars from the matching factorization.

lworkint, optional

Workspace size, at least m; -1 requests the query. Default is 3 * m.

overwrite_aint, optional

If nonzero, a may be overwritten in place. Default is 0.

Returns:

qndarray

The factor Q, overwriting a.

workndarray

Workspace actually used; work[0] is the optimal lwork.

infoint

0 on success; if negative, the -info-th argument had an illegal value.