scipy.linalg.lapack.zgemqrt#

scipy.linalg.lapack.zgemqrt(v, t, c, side='L', trans='N', overwrite_c=0) = <flapack function zgemqrt>#

Multiply a matrix by the Q of a compact-WY QR factorization (LAPACK zgemqrt).

Parameters:

vndarray: The reflectors geqrt left in its a.
tndarray: Upper triangular block reflectors, shape (nb, k). Its row count is taken as the block size and its column count as the reflector count.
cndarray: Matrix to multiply, shape (m, n).
sidestr, optional: 'L' for Q @ c, 'R' for c @ Q. Default is 'L'.
transstr, optional: 'N' to apply Q, 'C' to apply its conjugate transpose. Default is 'N'.
overwrite_cint, optional: If nonzero, c may be overwritten in place. Default is 0.

Returns:

cndarray: The product, overwriting c.
infoint: 0 on success; if negative, the -info-th argument had an illegal value.