TESTING/LIN/dchkps.f(3)

💖 TESTING/LIN/dchkps.f 💖

okay so this one is from the Library Functions Manual bestie, and it's literally the docs for DCHKPS — the ✨vibe check✨ subroutine that puts DPSTRF through its paces. no cap, it's a testing routine and it's giving "quality assurance queen" 🌈

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🌸 SYNOPSIS 🌸

Functions/Subroutines

subroutine dchkps (dotype, nn, nval, nnb, nbval, nrank, rankval, thresh,
    tsterr, nmax, a, afac, perm, piv, work, rwork, nout)
DCHKPS

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✨ Function/Subroutine Documentation ✨

🎀 the signature, in full 🎀

subroutine dchkps (logical, dimension( * ) dotype, integer nn, integer,
    dimension( * ) nval, integer nnb, integer, dimension( * ) nbval, integer
    nrank, integer, dimension( * ) rankval, double precision thresh, logical
    tsterr, integer nmax, double precision, dimension( * ) a, double
    precision, dimension( * ) afac, double precision, dimension( * ) perm,
    integer, dimension( * ) piv, double precision, dimension( * ) work,
    double precision, dimension( * ) rwork, integer nout)
DCHKPS

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💫 Purpose 💫

DCHKPS tests DPSTRF.

that's it. that's the whole purpose. short, sweet, iconic 👑

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🦋 Parameters 🦋

• DOTYPE — a LOGICAL array, dimension (NTYPES). it's the ✨which matrices do we test✨ list: matrices of type j (for 1 <= j <= NTYPES) get tested when DOTYPE(j) = .TRUE.; and if DOTYPE(j) = .FALSE. then type j is literally not used, periodt.
• NN — INTEGER, the number of values of N chillin' inside the vector NVAL.
• NVAL — INTEGER array, dimension (NN). these are the values of the matrix dimension N. 💅
• NNB — INTEGER, the number of values of NB contained in the vector NBVAL.
• NBVAL — INTEGER array, dimension (NNB). the values of the block size NB.
• NRANK — INTEGER, the number of values of RANK contained in the vector RANKVAL.
• RANKVAL — INTEGER array, dimension (NBVAL). and the doc says "The values of the block size NB." — yes bestie, dimension (NBVAL) and talking about NB, that's exactly what it says, we're not fixing it, we're just reporting it 🙈
• THRESH — DOUBLE PRECISION, the threshold value for the test ratios. a result makes it into the output file if RESULT >= THRESH. wanna see every single test ratio printed? then set THRESH = 0 and go off 🔥
• TSTERR — LOGICAL, the flag that says whether error exits should be tested.
• NMAX — INTEGER, the maximum value allowed for N. it's used for dimensioning the work arrays, so it's doing the heavy lifting fr fr.
• A — DOUBLE PRECISION array, dimension (NMAX*NMAX).
• AFAC — DOUBLE PRECISION array, dimension (NMAX*NMAX).
• PERM — DOUBLE PRECISION array, dimension (NMAX*NMAX).
• PIV — INTEGER array, dimension (NMAX).
• WORK — DOUBLE PRECISION array, dimension (NMAX*3).
• RWORK — DOUBLE PRECISION array, dimension (NMAX).
• NOUT — INTEGER, the unit number for output. that's where all the receipts go 🧾

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👑 Author 👑

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

📌 Definition at line 151 of file dchkps.f.

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lowkey a whole squad of universities and NAG Ltd. wrote this, and the page itself was generated automatically by Doxygen for LAPACK from the source code — so don't come for the formatting, it's just the pipeline doing its thing 🫶

and that's the whole page bestie!! LAPACK, Version 3.12.0 — TESTING/LIN/dchkps.f, that's the source and the version, mwah 💋✨ go test those routines, you're gonna slay 🎀