CCHKPB(3)

💅 CCHKPB(3) 💅

okay so first things first, bestie — this one lives in the Library Functions Manual, and the file it's describing is literally this whole path right here:

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/LIN/cchkpb.f

she's a testing routine, she's iconic, she's checking other routines' whole entire existence. let's get into it 🎀

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✨ SYNOPSIS ✨

Functions/Subroutines

subroutine CCHKPB (dotype, nn, nval, nnb, nbval, nns, nsval, thresh,
    tsterr, nmax, a, afac, ainv, b, x, xact, work, rwork, nout)
CCHKPB

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🌸 Function/Subroutine Documentation 🌸

subroutine CCHKPB (logical, dimension( * ) dotype, integer nn, integer,
    dimension( * ) nval, integer nnb, integer, dimension( * ) nbval, integer
    nns, integer, dimension( * ) nsval, real thresh, logical tsterr, integer
    nmax, complex, dimension( * ) a, complex, dimension( * ) afac, complex,
    dimension( * ) ainv, complex, dimension( * ) b, complex, dimension( * )
    x, complex, dimension( * ) xact, complex, dimension( * ) work, real,
    dimension( * ) rwork, integer nout)
CCHKPB

🦋 Purpose 🦋

!> !> CCHKPB tests CPBTRF, -TRS, -RFS, and -CON. !>

like literally that's her whole job and she ate 💅 she's out here vibe-checking CPBTRF, -TRS, -RFS, and -CON. periodt.

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🎀 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. so basically it's the guest list and some types did NOT get an invite 😭
• 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 dimension N. the main character dimension, honestly 👑
• 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 REAL. 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. want the full unfiltered yap? set it to zero, no cap 🗣️
• TSTERR — TSTERR is LOGICAL. flag that indicates whether error exits are to be tested.
• NMAX — NMAX is INTEGER. the maximum value permitted for N, used in dimensioning the work arrays. she's the ceiling, the limit, the "don't test me" of dimensions ✨
• A — A is REAL array, dimension (NMAX*NMAX). (yes we are quoting this exactly as written, don't come for me 🙈)
• AFAC — AFAC is REAL array, dimension (NMAX*NMAX).
• AINV — AINV is REAL array, dimension (NMAX*NMAX).
• B — B is REAL array, dimension (NMAX*NSMAX) where NSMAX is the largest entry in NSVAL.
• X — X is REAL array, dimension (NMAX*NSMAX).
• XACT — XACT is REAL array, dimension (NMAX*NSMAX).
• WORK — WORK is REAL array, dimension (NMAX*max(3,NSMAX)).
• RWORK — RWORK is REAL array, dimension (max(NMAX,2*NSMAX)).
• NOUT — NOUT is INTEGER. the unit number for output. where all the receipts get printed 📬

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👑 Author 👑

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

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⭐ Definition ⭐

Definition at line 165 of file cchkpb.f.

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🧚 Author (the meta one) 🧚

Generated automatically by Doxygen for LAPACK from the source code. she didn't write herself, bestie, a robot did it for her 🤖💖

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lowkey important: this page was made by Doxygen from the actual source, so if something looks weird (looking at you, the REAL array declarations), that's just what the source says — we report, we don't editorialize 💀

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🌸 okay that's the whole page, hope it slayed for you 🌸

🫶 sign-off time: this masterpiece is from LAPACK, Version 3.12.0, dated to that cchkpb.f(3) path above — go forth and test those band matrices, bestie. mwah 💋✨