ZCHKPT(3)

🎀 zchkpt.f(3) — Library Functions Manual 🎀

okay bestie so this is a library functions manual page and honestly? it's giving test-driver energy. it's zchkpt.f(3), one of the LAPACK testing routines, and we're gonna go through it line by line because you deserve to know 💅

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✨ NAME ✨

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

like... that's the whole name. it's a whole absolute file path as a NAME entry. no cap. that's literally it. 🫶

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🌸 SYNOPSIS 🌸

Functions/Subroutines

here's the cast, main character first:

subroutine ZCHKPT (dotype, nn, nval, nns, nsval, thresh, tsterr, a, d,
    e, b, x, xact, work, rwork, nout)

ZCHKPT

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💖 Function/Subroutine Documentation 💖

subroutine ZCHKPT

here's the full signature with all the type tea ☕ — every single argument, exactly as declared:

subroutine ZCHKPT (logical, dimension( * ) dotype, integer nn, integer,
    dimension( * ) nval, integer nns, integer, dimension( * ) nsval, double
    precision thresh, logical tsterr, complex*16, dimension( * ) a, double
    precision, dimension( * ) d, complex*16, dimension( * ) e, complex*16,
    dimension( * ) b, complex*16, dimension( * ) x, complex*16, dimension( *
    ) xact, complex*16, dimension( * ) work, double precision, dimension( *
    ) rwork, integer nout)

ZCHKPT

🦋 Purpose:

!> !> ZCHKPT tests ZPTTRF, -TRS, -RFS, and -CON !>

so yeah — it's the vibe check for ZPTTRF, -TRS, -RFS, and -CON. those four? tested. periodt. 💅

💜 Parameters

• DOTYPE — DOTYPE is LOGICAL array, dimension (NTYPES). the matrix types we're gonna use for testing. matrices of type j (for 1 <= j <= NTYPES) get tested if DOTYPE(j) = .TRUE.; and if DOTYPE(j) = .FALSE., then type j is literally not invited to the function. not used. 🚫
• NN — NN is INTEGER. it's the number of values of N contained in the vector NVAL.
• NVAL — NVAL is INTEGER array, dimension (NN). these are the actual values of the matrix dimension N. the real ones. 🌟
• 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. iykyk.
• THRESH — THRESH is DOUBLE PRECISION. the threshold value for the test ratios. a result gets included in the output file if RESULT >= THRESH. and if you want every single test ratio printed? use THRESH = 0. zero. all of it. no filter. 😭✨
• TSTERR — TSTERR is LOGICAL. flag that indicates whether error exits are to be tested or not.
• A — A is COMPLEX*16 array, dimension (NMAX*2).
• D — D is DOUBLE PRECISION array, dimension (NMAX*2).
• E — E is COMPLEX*16 array, dimension (NMAX*2).
• B — B is COMPLEX*16 array, dimension (NMAX*NSMAX) where NSMAX is the largest entry in NSVAL. biggest one in the group chat, basically. 👑
• 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)). that's max(3,NSMAX) inside the parens, do not come for me, i'm just reading the page. 🧚
• RWORK — RWORK is DOUBLE PRECISION array, dimension (max(NMAX,2*NSMAX)).
• NOUT — NOUT is INTEGER. the unit number for output. that's where the tea gets spilled. 🍓

🌈 Author

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

Definition at line 145 of file zchkpt.f. (you know exactly where to find it 💀)

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⭐ Author ⭐

Generated automatically by Doxygen for LAPACK from the source code. so it wasn't even handwritten, it was generated — the source code did the work and doxygen took the credit, iconic behavior honestly 😭

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and that's the whole page bestie! it's LAPACK, Version 3.12.0, and the footer path is /home/abui...IN/zchkpt.f(3) — mwah, go take those test ratios, slay, and remember: THRESH = 0 if you want everything printed 💅✨🎀