DDRVSY_ROOK(3)

💅 TESTING/LI...rvsy_rook.f(3) — like, the ddrvsy_rook page, bestie

okay so this is a page from the Library Functions Manual (yes, that's the manual name, we're folding it in early so you're not confused 🎀). It's covering TESTING/LIN/ddrvsy_rook.f, and no cap, it's a whole testing driver. Let's get into it ✨

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🌸 SYNOPSIS

✨ Functions/Subroutines

• subroutine ddrvsy_rook (dotype, nn, nval, nrhs, thresh, tsterr, nmax, a, afac, ainv, b, x, xact, work, rwork, iwork, nout) — literally the whole thing, it's DDRVSY_ROOK 👑

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💖 Function/Subroutine Documentation

okay here's the full signature, typed out exactly so you can copy-paste it into your little code, bestie:

subroutine ddrvsy_rook (logical, dimension( * ) dotype, integer nn, integer,
    dimension( * ) nval, integer nrhs, double precision thresh, logical
    tsterr, integer nmax, double precision, dimension( * ) a, double
    precision, dimension( * ) afac, double precision, dimension( * ) ainv,
    double precision, dimension( * ) b, double precision, dimension( * ) x,
    double precision, dimension( * ) xact, double precision, dimension( * )
    work, double precision, dimension( * ) rwork, integer, dimension( * )
    iwork, integer nout)

DDRVSY_ROOK — she's the function, that's her name 💅

🦋 Purpose

DDRVSY_ROOK tests the driver routines DSYSV_ROOK.

that's it, that's the whole purpose. she's a test driver for DSYSV_ROOK and she takes her job very seriously 🫶

🌈 Parameters

okay, this is the long part, but every single one matters, so buckle up 🎀

• DOTYPE — DOTYPE is LOGICAL array, dimension (NTYPES). this is the "which matrix types are we even testing" list. matrices of type j (for 1 <= j <= NTYPES) get tested if DOTYPE(j) = .TRUE.; and if DOTYPE(j) = .FALSE., then type j is not used. periodt. 🙈
• NN — NN is INTEGER. the number of values of N contained in the vector NVAL. slay.
• NVAL — NVAL is INTEGER array, dimension (NN). these are the values of the matrix dimension N. iykyk.
• NRHS — NRHS is INTEGER. the number of right hand side vectors to be generated for each linear system. main character info fr fr.
• 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 test ratio printed? use THRESH = 0. obsessed with that actually ✨
• TSTERR — TSTERR is LOGICAL. flag that indicates whether error exits are to be tested. lowkey important.
• NMAX — NMAX is INTEGER. the maximum value permitted for N, used in dimensioning the work arrays. she's the ceiling, bestie.
• A — A is DOUBLE PRECISION array, dimension (NMAX*NMAX).
• AFAC — AFAC is DOUBLE PRECISION array, dimension (NMAX*NMAX).
• AINV — AINV is DOUBLE PRECISION array, dimension (NMAX*NMAX).
• B — B is DOUBLE PRECISION array, dimension (NMAX*NRHS).
• X — X is DOUBLE PRECISION array, dimension (NMAX*NRHS).
• XACT — XACT is DOUBLE PRECISION array, dimension (NMAX*NRHS).
• WORK — WORK is DOUBLE PRECISION array, dimension (NMAX*max(2,NRHS)). yes, max(2,NRHS), don't @ me.
• RWORK — RWORK is DOUBLE PRECISION array, dimension (NMAX+2*NRHS).
• IWORK — IWORK is INTEGER array, dimension (2*NMAX).
• NOUT — NOUT is INTEGER. the unit number for output. that's where everything gets printed 🖨️

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👑 Author

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

and in case you were wondering where in the file this all lives: Definition at line 149 of file ddrvsy_rook.f. 📍

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💜 Author (the other one)

Generated automatically by Doxygen for LAPACK from the source code.

so like, a robot wrote this page, not a person, which is honestly kind of iconic of it 🤖✨

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and that's the whole page, bestie!! 🍓

💖 cute little sign-off: this masterpiece is brought to you by LAPACK, Version 3.12.0, covering TESTING/LI...rvsy_rook.f(3) — go forth and test those symmetric rook-pivoted solve routines, you absolute legend 🫶💅