DDRVAB(3)

💅 DDRVAB(3) — like, the manual page, bestie

okay so real talk, this is from the Library Functions Manual ✨ and it's the page for ddrvab.f(3), no cap.

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🌸 NAME 🌸

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

like yes, the NAME is the whole entire path, that's just how it is here 💀

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✨ SYNOPSIS ✨

🎀 Functions/Subroutines 🎀

subroutine DDRVAB (dotype, nm, mval, nns, nsval, thresh, nmax, a, afac,
    b, x, work, rwork, swork, iwork, nout)
    DDRVAB

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🦋 Function/Subroutine Documentation 🦋

subroutine DDRVAB (logical, dimension( * ) dotype, integer nm, integer,
    dimension( * ) mval, integer nns, integer, dimension( * ) nsval, double
    precision thresh, integer nmax, double precision, dimension( * ) a,
    double precision, dimension( * ) afac, double precision, dimension( * )
    b, double precision, dimension( * ) x, double precision, dimension( * )
    work, double precision, dimension( * ) rwork, real, dimension(*) swork,
    integer, dimension( * ) iwork, integer nout)
DDRVAB

💖 Purpose: 💖

!>
!> DDRVAB tests DSGESV
!>

that's it. that's the whole purpose. she's a tester for DSGESV and she's iconic for it 👑

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🌈 Parameters 🌈

• DOTYPE — bestie, this is a LOGICAL array, dimension (NTYPES). It's literally the guest list for the matrix types 💅 Matrices of type j (for 1 <= j <= NTYPES) get used for testing if DOTYPE(j) = .TRUE.; but if DOTYPE(j) = .FALSE., then type j is not used. not invited. blocked. 🙈
• NM — NM is INTEGER. It's the number of values of M contained in the vector MVAL.
• MVAL — MVAL is INTEGER array, dimension (NM). These are the values of the matrix row dimension M. like, all the possible M's, lined up ✨
• 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. yup, right hand sides, plural, she contains multitudes 🫶
• THRESH — THRESH is DOUBLE PRECISION. This is the threshold value for the test ratios, and here's the tea: a result gets included in the output file if RESULT >= THRESH. Wanna have literally every test ratio printed? use THRESH = 0. no filter, main character energy 🔥
• NMAX — NMAX is INTEGER. The maximum value permitted for M or N, and it's used in dimensioning the work arrays. she's the ceiling, fr fr.
• A — A is DOUBLE PRECISION array, dimension (NMAX*NMAX). 💀
• AFAC — AFAC is DOUBLE PRECISION array, dimension (NMAX*NMAX). also (NMAX*NMAX). twins.
• B — B is DOUBLE PRECISION array, dimension (NMAX*NSMAX) — where NSMAX is the largest entry in NSVAL. lowkey the biggest one wins, that's just the vibe check.
• X — X is DOUBLE PRECISION array, dimension (NMAX*NSMAX). same size as B, they're matching 🎀
• WORK — WORK is DOUBLE PRECISION array, dimension (NMAX*max(3,NSMAX)). note the max(3,NSMAX), she's flexible ✨
• RWORK — RWORK is DOUBLE PRECISION array, dimension (max(2*NMAX,2*NSMAX+NWORK)). yes the nesting is real and yes you have to read it carefully 😭
• SWORK — SWORK is REAL array, dimension (NMAX*(NSMAX+NMAX)). and no, she's not DOUBLE PRECISION like her siblings, she's REAL, leave her alone 🙈
• IWORK — IWORK is INTEGER array, dimension NMAX. the integers are here 🧚
• NOUT — NOUT is INTEGER. The unit number for output. that's where the receipts go 📬

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also while i have you: this whole thing operates on DOUBLE PRECISION arrays everywhere except SWORK, which is REAL. do not mix them up, bestie, i'm begging 💀

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👑 Author 👑

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

the whole squad 🫶

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⭐ Definition ⭐

Definition at line 148 of file ddrvab.f.

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💜 Author 💜

Generated automatically by Doxygen for LAPACK from the source code.

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and that's the page!! go off, test those matrices 💅

🌸 LAPACK, Version 3.12.0 🌸 — /home/abui...IN/ddrvab.f(3) — mwah, bye bestie 🎀✨