ML_DGELQF – Computes an LQ factorization of a real M-by-N matrix A

Block SymbolLicensing group: MATRIX
PIC

Function Description
The output references yA, yTAU and yWORK are always set to the corresponding input references uA, uTAU and uWORK. If HLD = on then nothing is computed otherwise the LAPACK function DGELQF is called internally:

DGELQF(M, N, uA, LDA, uTAU, uWORK, LWORK, info);

where parameters of DGELQF are set in the following way:

The error flag E is set to on if:

See LAPACK documentation [8] for more details.

Inputs

uA

Input reference to matrix A

reference

uTAU

Input reference to vector of scalar factors of the elementary reflectors

reference

uWORK

Input reference to working vector WORK

reference

HLD

Hold

bool

Outputs

yA

Output reference to matrix A

reference

yTAU

Output reference to vector of scalar factors of the elementary reflectors

reference

yWORK

Output reference to working vector WORK

reference

E

Error indicator

bool

info

LAPACK function result info. If info = -i, the i=th argument had an illegal value

long