TESTING/LIN/dchklq.f(3)

💖 NAME 💖

Okay bestie, this page is literally TESTING/LIN/dchklq.f(3) from the Library Functions Manual, and it’s all about the DCHKLQ subroutine. Buckle up. 🎀

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🌈 SYNOPSIS 🌈

🧚 Functions/Subroutines 🧚

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

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💅 Function/Subroutine Documentation 💅

Here’s the full signature, served fresh and exact — no cap:

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 — the routine name, front and center. 💅

🎯 Purpose 🎯

DCHKLQ tests DGELQF, DORGLQ and DORMLQ. That’s the whole vibe check. ✨

🍓 Parameters 🍓

• DOTYPE — DOTYPE is 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 — NM is INTEGER. The number of values of M contained in the vector MVAL.
• MVAL — MVAL is INTEGER array, dimension (NM). The values of the matrix row dimension M.
• NN — NN is INTEGER. The number of values of N contained in the vector NVAL.
• NVAL — NVAL is INTEGER array, dimension (NN). The values of the matrix column dimension N.
• NNB — NNB is 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 — NBVAL is INTEGER array, dimension (NNB). The values of the blocksize NB.
• NXVAL — NXVAL is INTEGER array, dimension (NNB). The values of the crossover point NX.
• NRHS — NRHS is INTEGER. The number of right hand side vectors to be generated for each linear system.
• THRESH — THRESH is 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 — TSTERR is LOGICAL. Flag that indicates whether error exits are to be tested.
• NMAX — NMAX is INTEGER. The maximum value permitted for M or N, used in dimensioning the work arrays.
• A — A is DOUBLE PRECISION array, dimension (NMAX*NMAX).
• AF — AF is DOUBLE PRECISION array, dimension (NMAX*NMAX).
• AQ — AQ is DOUBLE PRECISION array, dimension (NMAX*NMAX).
• AL — AL is DOUBLE PRECISION array, dimension (NMAX*NMAX).
• AC — AC is DOUBLE PRECISION array, dimension (NMAX*NMAX).
• B — B is DOUBLE PRECISION array, dimension (NMAX*NRHS).
• X — X is DOUBLE PRECISION array, dimension (NMAX*NRHS).
• XACT — XACT is DOUBLE PRECISION array, dimension (NMAX*NRHS).
• TAU — TAU is DOUBLE PRECISION array, dimension (NMAX).
• WORK — WORK is DOUBLE PRECISION array, dimension (NMAX*NMAX).
• RWORK — RWORK is DOUBLE PRECISION array, dimension (NMAX).
• NOUT — NOUT is INTEGER. The unit number for output.

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👑 Author 👑

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

Definition at line 193 of file dchklq.f.

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✨ Author ✨

Generated automatically by Doxygen for LAPACK from the source code.

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Final sign-off, periodt: LAPACK Version 3.12.0, TESTING/LIN/dchklq.f(3) — that’s the source/version footer tea, bestie. 💅✨🫶