TESTING/LIN/zchkgb.f(3)

💅 NAME

TESTING/LIN/zchkgb.f — from the Library Functions Manual, bestie. This is the page for the zchkgb subroutine and it's lowkey iconic. 🎀

✨ SYNOPSIS ✨

Functions/Subroutines — okay so here's the signature, no cap:

subroutine zchkgb (dotype, nm, mval, nn, nval, nnb, nbval, nns, nsval, thresh, tsterr, a, la, afac, lafac, b, x, xact, work, rwork, iwork, nout)

ZCHKGB — that's the name, slay. 💅

🌸 Function/Subroutine Documentation 🌸

Okay bestie, here's the full signature with every type and dimension, copied exactly because we do not play about types:

subroutine zchkgb (logical, dimension( * ) dotype, integer nm, integer, dimension( * ) mval, integer nn, integer, dimension( * ) nval, integer nnb, integer, dimension( * ) nbval, integer nns, integer, dimension( * ) nsval, double precision thresh, logical tsterr, complex*16, dimension( * ) a, integer la, complex*16, dimension( * ) afac, integer lafac, complex*16, dimension( * ) b, complex*16, dimension( * ) x, complex*16, dimension( * ) xact, complex*16, dimension( * ) work, double precision, dimension( * ) rwork, integer, dimension( * ) iwork, integer nout)

ZCHKGB — again, because it's literally the main character. 👑

🎯 Purpose

ZCHKGB tests ZGBTRF, -TRS, -RFS, and -CON. That's it. That's the whole purpose and it ate. 🔥

📝 Parameters

Here's every single parameter, bestie, no skipping, fr fr:

• 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 contained in the vector NBVAL.
• NBVAL — NBVAL is INTEGER array, dimension (NNB). The values of the blocksize NB.
• NNS — NNS is INTEGER. The number of values of NRHS contained in the vector NSVAL.
• NSVAL — NSVAL is INTEGER array, dimension (NNS). The values of the number of right hand sides NRHS.
• 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.
• A — A is COMPLEX*16 array, dimension (LA).
• LA — LA is INTEGER. The length of the array A. LA >= (KLMAX+KUMAX+1)*NMAX where KLMAX is the largest entry in the local array KLVAL, KUMAX is the largest entry in the local array KUVAL and NMAX is the largest entry in the input array NVAL.
• AFAC — AFAC is COMPLEX*16 array, dimension (LAFAC).
• LAFAC — LAFAC is INTEGER. The length of the array AFAC. LAFAC >= (2*KLMAX+KUMAX+1)*NMAX where KLMAX is the largest entry in the local array KLVAL, KUMAX is the largest entry in the local array KUVAL and NMAX is the largest entry in the input array NVAL.
• B — B is COMPLEX*16 array, dimension (NMAX*NSMAX).
• X — X is COMPLEX*16 array, dimension (NMAX*NSMAX).
• XACT — XACT is COMPLEX*16 array, dimension (NMAX*NSMAX).
• WORK — WORK is COMPLEX*16 array, dimension (NMAX*max(3,NSMAX,NMAX)).
• RWORK — RWORK is DOUBLE PRECISION array, dimension (NMAX+2*NSMAX).
• IWORK — IWORK is INTEGER array, dimension (NMAX).
• NOUT — NOUT is INTEGER. The unit number for output.

👑 Author

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

📍 Definition at line 188 of file zchkgb.f.

That's literally where it's defined, bestie. Line 188 of zchkgb.f. Periodt. 💖

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Okay that's the whole page! This glorious thing was generated automatically by Doxygen for LAPACK from the source code, LAPACK Version 3.12.0, and the file is TESTING/LIN/zchkgb.f(3). bye bestie 💖✨🦋