DCHKLQ(3)

NAME 💖

Okay bestie, welcome to the DCHKLQ(3) page from the Library Functions Manual. The NAME block is honestly just this file path, so here it is exactly: /home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/LIN/dchklq.f.

SYNOPSIS ✨

Functions/Subroutines 🎀

Here’s the callable tea, with the signature kept exactly as given:

       subroutine DCHKLQ (dotype, nm, mval, nn, nval, nnb, nbval, nxval, nrhs,
           thresh, tsterr, nmax, a, af, aq, al, ac, b, x, xact, tau, work,
           rwork, nout)
           DCHKLQ

Function/Subroutine Documentation 🦋

Bestie, this section gives the full typed signature and then repeats DCHKLQ. Iconic. Here’s the exact block:

   subroutine DCHKLQ (logical, dimension( * ) dotype, integer nm, integer,
       dimension( * ) mval, integer nn, integer, dimension( * ) nval, integer
       nnb, integer, dimension( * ) nbval, integer, dimension( * ) nxval,
       integer nrhs, double precision thresh, logical tsterr, integer nmax,
       double precision, dimension( * ) a, double precision, dimension( * ) af,
       double precision, dimension( * ) aq, double precision, dimension( * )
       al, double precision, dimension( * ) ac, double precision, dimension( *
       ) b, double precision, dimension( * ) x, double precision, dimension( *
       ) xact, double precision, dimension( * ) tau, double precision,
       dimension( * ) work, double precision, dimension( * ) rwork, integer
       nout)
       DCHKLQ

Purpose 💅

Straight from the page: DCHKLQ tests DGELQF, DORGLQ and DORMLQ. That’s the whole purpose, no cap. ✨

Parameters 🍓

• DOTYPE — LOGICAL array, dimension (NTYPES). The matrix types to be used for testing. Matrices of type j (for 1 <= j <= NTYPES) are used for testing if DOTYPE(j) = .TRUE.; if DOTYPE(j) = .FALSE., then type j is not used.
• NM — INTEGER. The number of values of M contained in the vector MVAL.
• MVAL — INTEGER array, dimension (NM). The values of the matrix row dimension M.
• NN — INTEGER. The number of values of N contained in the vector NVAL.
• NVAL — INTEGER array, dimension (NN). The values of the matrix column dimension N.
• NNB — INTEGER. The number of values of NB and NX contained in the vectors NBVAL and NXVAL. The blocking parameters are used in pairs (NB,NX).
• NBVAL — INTEGER array, dimension (NNB). The values of the blocksize NB.
• NXVAL — INTEGER array, dimension (NNB). The values of the crossover point NX.
• NRHS — INTEGER. The number of right hand side vectors to be generated for each linear system.
• THRESH — DOUBLE PRECISION. The threshold value for the test ratios. A result is included in the output file if RESULT >= THRESH. To have every test ratio printed, use THRESH = 0.
• TSTERR — LOGICAL. Flag that indicates whether error exits are to be tested.
• NMAX — INTEGER. The maximum value permitted for M or N, used in dimensioning the work arrays.
• A — DOUBLE PRECISION array, dimension (NMAX*NMAX).
• AF — DOUBLE PRECISION array, dimension (NMAX*NMAX).
• AQ — DOUBLE PRECISION array, dimension (NMAX*NMAX).
• AL — DOUBLE PRECISION array, dimension (NMAX*NMAX).
• AC — DOUBLE PRECISION array, dimension (NMAX*NMAX).
• B — DOUBLE PRECISION array, dimension (NMAX*NRHS).
• X — DOUBLE PRECISION array, dimension (NMAX*NRHS).
• XACT — DOUBLE PRECISION array, dimension (NMAX*NRHS).
• TAU — DOUBLE PRECISION array, dimension (NMAX).
• WORK — DOUBLE PRECISION array, dimension (NMAX*NMAX).
• RWORK — DOUBLE PRECISION array, dimension (NMAX).
• NOUT — INTEGER. The unit number for output.

Author 🫶

• Univ. of Tennessee
• Univ. of California Berkeley
• Univ. of Colorado Denver
• NAG Ltd.

Definition at line 193 of file dchklq.f.

Author 💻

This next Author block is the meta one: it was generated automatically by Doxygen for LAPACK from the source code.

---

Sign-off time, bestie 🫶: source is LAPACK, version 3.12.0, and the page path is /home/abui...IN/dchklq.f(3). Date? Not printed on this page, bestie. Bye 💅✨