DCKGQR(3)

NAME 💖

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/EIG/dckgqr.f — that's the whole name, bestie, not a typo and not a drill. 😭

okay so this is the Library Functions Manual page for DCKGQR(3), and the page file is /home/abui...IG/dckgqr.f(3). It's giving LAPACK test-routine main character energy, and we're gonna read the whole thing together. 🫶

SYNOPSIS ✨

Functions/Subroutines 🫶

subroutine DCKGQR (nm, mval, np, pval, nn, nval, nmats, iseed, thresh,
    nmax, a, af, aq, ar, taua, b, bf, bz, bt, bwk, taub, work, rwork,
    nin, nout, info)

DCKGQR — yes, that's the routine. 💅

Function/Subroutine Documentation 🌸

subroutine DCKGQR (the full typed signature) 🧚

subroutine DCKGQR (integer nm, integer, dimension( * ) mval, integer np,
    integer, dimension( * ) pval, integer nn, integer, dimension( * ) nval,
    integer nmats, integer, dimension( 4 ) iseed, double precision thresh,
    integer nmax, double precision, dimension( * ) a, double precision,
    dimension( * ) af, double precision, dimension( * ) aq, double
    precision, dimension( * ) ar, double precision, dimension( * ) taua,
    double precision, dimension( * ) b, double precision, dimension( * ) bf,
    double precision, dimension( * ) bz, double precision, dimension( * )
    bt, double precision, dimension( * ) bwk, double precision, dimension( *
    ) taub, double precision, dimension( * ) work, double precision,
    dimension( * ) rwork, integer nin, integer nout, integer info)

DCKGQR

Purpose: 🦋

okay so DCKGQR tests these two icons:

• DGGQRF: the GQR factorization for an N-by-M matrix A and an N-by-P matrix B.
• DGGRQF: the GRQ factorization for an M-by-N matrix A and a P-by-N matrix B.

No cap, that's the whole purpose. ✨

Parameters 🎀

• NM — is INTEGER. It's the number of values of M contained in the vector MVAL. 💖
• MVAL — is INTEGER array, dimension (NM). These are the values of the matrix row(column) dimension M. 🌸
• NP — is INTEGER. It's the number of values of P contained in the vector PVAL. 💜
• PVAL — is INTEGER array, dimension (NP). These are the values of the matrix row(column) dimension P. 🦋
• NN — is INTEGER. It's the number of values of N contained in the vector NVAL. 🎀
• NVAL — is INTEGER array, dimension (NN). These are the values of the matrix column(row) dimension N. 🌈
• NMATS — is INTEGER. It's the number of matrix types to be tested for each combination of matrix dimensions. If NMATS >= NTYPES (the maximum number of matrix types), then all the different types are generated for testing. If NMATS < NTYPES, another input line is read to get the numbers of the matrix types to be used. 🫶
• ISEED — is INTEGER array, dimension (4). On entry, it's the seed of the random number generator. The array elements should be between 0 and 4095, otherwise they will be reduced mod 4096, and ISEED(4) must be odd. On exit, it's the next seed in the random number sequence after all the test matrices have been generated. 🔥
• THRESH — is DOUBLE PRECISION. It's 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. 👑
• NMAX — is INTEGER. It's the maximum value permitted for M or N, used in dimensioning the work arrays. 💅
• A — is DOUBLE PRECISION array, dimension (NMAX*NMAX). 🍓
• AF — is DOUBLE PRECISION array, dimension (NMAX*NMAX). 🍓
• AQ — is DOUBLE PRECISION array, dimension (NMAX*NMAX). 🍓
• AR — is DOUBLE PRECISION array, dimension (NMAX*NMAX). 🍓
• TAUA — is DOUBLE PRECISION array, dimension (NMAX). 🧚
• B — is DOUBLE PRECISION array, dimension (NMAX*NMAX). 🍓
• BF — is DOUBLE PRECISION array, dimension (NMAX*NMAX). 🍓
• BZ — is DOUBLE PRECISION array, dimension (NMAX*NMAX). 🍓
• BT — is DOUBLE PRECISION array, dimension (NMAX*NMAX). 🍓
• BWK — is DOUBLE PRECISION array, dimension (NMAX*NMAX). 🍓
• TAUB — is DOUBLE PRECISION array, dimension (NMAX). 🧚
• WORK — is DOUBLE PRECISION array, dimension (NMAX*NMAX). 💜
• RWORK — is DOUBLE PRECISION array, dimension (NMAX). 💜
• NIN — is INTEGER. It's the unit number for input. 🌸
• NOUT — is INTEGER. It's the unit number for output. 🌸
• INFO — is INTEGER.
  • = 0 : successful exit
  • > 0 : If DLATMS returns an error code, the absolute value of it is returned.

bestie, that INFO > 0 line is the one to watch: if DLATMS returns an error code, the absolute value of it is returned. no cap. 😭

Author 👑

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

Definition at line 207 of file dckgqr.f.

Author 🌈

Generated automatically by Doxygen for LAPACK from the source code.

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okay that's the whole page, bestie. periodt. 💖✨ This icon was brought to you by LAPACK Version 3.12.0, and the footer stamp is /home/abui...IG/dckgqr.f(3). 🎀🦋