TESTING/LIN/schkpb.f(3)

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version 3.12.1 · 3 versions
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🌸 TESTING/LIN/schkpb.f — the LAPACK one 💅

okay bestie, so this is TESTING/LIN/schkpb.f, a page from the Library Functions Manual, and it's literally the vibe check for the symmetric positive-definite band routines. like it's the test driver. it does not do math at you, it judges the math. 🎀

✨ SYNOPSIS ✨

Functions/Subroutines — the main character 🫶

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

SCHKPB — periodt. that's the name, no notes. 👑

💖 Function/Subroutine Documentation 💖

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

SCHKPB

🦋 Purpose 🦋

!> !> SCHKPB tests SPBTRF, -TRS, -RFS, and -CON. !>

yup. that's the whole assignment. it's out here putting SPBTRF, SPBTRS, SPBRFS and SPBCON through their paces — four routines, one glow-up arc. 💀

🎀 Parameters 🎀

like, every single one, no skipping, i would never 🙈

  • DOTYPE — LOGICAL array, dimension (NTYPES). the matrix types to be used for testing, bestie. 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. it's giving guest list. 💅
  • NN — INTEGER. the number of values of N contained in the vector NVAL. simply the count. ⭐
  • NVAL — INTEGER array, dimension (NN). the values of the matrix dimension N. slay, dimensions. 🌈
  • NNB — INTEGER. the number of values of NB contained in the vector NBVAL. yes another count, she contains multitudes. ✨
  • NBVAL — INTEGER array, dimension (NNB). the values of the blocksize NB. block it out. 🧱
  • NNS — INTEGER. the number of values of NRHS contained in the vector NSVAL. third count, third crown. 👑
  • NSVAL — INTEGER array, dimension (NNS). the values of the number of right hand sides NRHS. the right-hand sides are the moment, ngl. 🍓
  • THRESH — 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. yes really, zero means everything gets printed. no filter, no chill. 💀
  • TSTERR — LOGICAL. flag that indicates whether error exits are to be tested. we love a flag. 🚩
  • NMAX — INTEGER. the maximum value permitted for N, used in dimensioning the work arrays. she's the ceiling and the blueprint. 🔥
  • A — REAL array, dimension (NMAX*NMAX). 🫶
  • AFAC — REAL array, dimension (NMAX*NMAX). 🫶
  • AINV — REAL array, dimension (NMAX*NMAX). 🫶
  • B — REAL array, dimension (NMAX*NSMAX), where NSMAX is the largest entry in NSVAL. good to know, noted. 📝
  • X — REAL array, dimension (NMAX*NSMAX). 💜
  • XACT — REAL array, dimension (NMAX*NSMAX). the exact one, the standard, the reference. iconic. ⭐
  • WORK — REAL array, dimension (NMAX*max(3,NSMAX)). look at that nesting, she's fancy. 🌸
  • RWORK — REAL array, dimension (max(NMAX,2*NSMAX)). the R stands for real, the max stands for math i'm not doing. 😭
  • IWORK — INTEGER array, dimension (NMAX). the integer friend in the group chat. 🦋
  • NOUT — INTEGER. the unit number for output. where the receipts get written. 🧾

👑 Author 👑

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

four institutions, one subroutine, an absolute collab. 🤝

Definition at line 169 of file schkpb.f. so if you're scrolling, that's where she lives. 📍

🌟 Author (again, the meta one) 🌟

Generated automatically by Doxygen for LAPACK from the source code. so technically the robot wrote it, but the vibes are all ours bestie. 🧚

okay that's the whole page, and if you made it this far you're lowkey a LAPACK scholar now, no cap. this masterpiece came to you from LAPACK, Version 3.12.0 (footer said TESTING/LIN/schkpb.f(3) and we respect the footer), so go test those band matrices and slay, iykyk. 🫶💖✨

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