TESTING/LIN/dchkpo.f(3)

🎀 NAME 🎀

TESTING/LIN/dchkpo.f — this is the page for that file, and it lives in the Library Functions Manual. The header title is TESTING/LIN/dchkpo.f(3), folded in right here so you don’t have to squint at a giant header line, bestie. 💖

---

✨ SYNOPSIS ✨

Functions/Subroutines — here’s the lineup, no cap:

🦋 Functions/Subroutines 🦋

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

DCHKPO — that’s the subroutine’s name, and yes it’s giving main character energy. 💅

---

👑 Function/Subroutine Documentation 👑

okay so here’s the full signature in all its glory:

subroutine dchkpo (logical, dimension( * ) dotype, integer nn, integer,
    dimension( * ) nval, integer nnb, integer, dimension( * ) nbval, integer
    nns, integer, dimension( * ) nsval, 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)

DCHKPO — the name, again, because it deserves a second entrance. 👑

🌸 Purpose 🌸

DCHKPO tests DPOTRF, -TRI, -TRS, -RFS, and -CON. That’s the whole purpose — iconic, focused, periodt. ✨

💖 Parameters 💖

Here’s every parameter, with the exact types and dimensions, because we do not skip details in this house:

• DOTYPE — LOGICAL array, dimension (NTYPES). The matrix types to be used for testing. 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.
• NN — INTEGER. The number of values of N contained in the vector NVAL.
• NVAL — INTEGER array, dimension (NN). 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 blocksize NB.
• NNS — INTEGER. The number of values of NRHS contained in the vector NSVAL.
• NSVAL — INTEGER array, dimension (NNS). The values of the number of right hand sides NRHS.
• THRESH — DOUBLE PRECISION. 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.
• TSTERR — LOGICAL. Flag that indicates whether error exits are to be tested.
• NMAX — INTEGER. The maximum value permitted for N, used in dimensioning the work arrays.
• A — DOUBLE PRECISION array, dimension (NMAX*NMAX).
• AFAC — DOUBLE PRECISION array, dimension (NMAX*NMAX).
• AINV — DOUBLE PRECISION array, dimension (NMAX*NMAX).
• B — DOUBLE PRECISION array, dimension (NMAX*NSMAX) where NSMAX is the largest entry in NSVAL.
• X — DOUBLE PRECISION array, dimension (NMAX*NSMAX).
• XACT — DOUBLE PRECISION array, dimension (NMAX*NSMAX).
• WORK — DOUBLE PRECISION array, dimension (NMAX*max(3,NSMAX)).
• RWORK — DOUBLE PRECISION array, dimension (max(NMAX,2*NSMAX)).
• IWORK — INTEGER array, dimension (NMAX).
• NOUT — INTEGER. The unit number for output.

🫶 Author 🫶

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

Definition at line 169 of file dchkpo.f.

---

🌈 Author 🌈

Generated automatically by Doxygen for LAPACK from the source code.

---

Signed off with maximum sparkle: LAPACK, Version 3.12.0, page TESTING/LIN/dchkpo.f(3) — no date in the footer, so no invented date, bestie. 💅🫶