DCHKTP(3)

💖 DCHKTP(3) 💖

okay so bestie, welcome to the dchktp.f(3) page from the LAPACK Library Functions Manual — yes, the manual name is folded in right here like a little name tag at the group chat door 🫶.

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🌸 NAME 🌸

this page is pointing at this source file, and it’s giving “file path reveal”:

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

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✨ SYNOPSIS ✨

🎀 Functions/Subroutines 🎀

the short version is this absolute icon:

subroutine DCHKTP (dotype, nn, nval, nns, nsval, thresh, tsterr, nmax,
    ap, ainvp, b, x, xact, work, rwork, iwork, nout)

and the subroutine name is literally DCHKTP.

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🦋 Function/Subroutine Documentation 🦋

okay, here’s the full signature, no cap:

subroutine DCHKTP (logical, dimension( * ) dotype, integer nn, integer,
    dimension( * ) nval, integer nns, integer, dimension( * ) nsval, double
    precision thresh, logical tsterr, integer nmax, double precision,
    dimension( * ) ap, double precision, dimension( * ) ainvp, 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)

again, the routine is DCHKTP — iconic, honestly.

💖 Purpose: 💖

the source comments are wrapped in Doxygen !> little comment bits, but the actual tea is: DCHKTP tests DTPTRI, -TRS, -RFS, and -CON, and DLATPS. periodt. 🌈

💅 Parameters 💅

• DOTYPE — a LOGICAL array, dimension (NTYPES). It’s the matrix-type picker: 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. no notes, just vibes.
• NN — INTEGER; the number of values of N contained in the vector NVAL.
• NVAL — INTEGER array, dimension (NN); these are the values of the matrix column dimension N.
• NNS — INTEGER; the number of values of NRHS contained in the vector NSVAL.
• NSVAL — INTEGER array, dimension (NNS); these are 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. want every test ratio printed? Use THRESH = 0. slay.
• TSTERR — LOGICAL; flag that indicates whether error exits are to be tested.
• NMAX — INTEGER; the leading dimension of the work arrays. NMAX >= the maximum value of N in NVAL. keep that boundary respected, bestie.
• AP — DOUBLE PRECISION array, dimension (NMAX*(NMAX+1)/2).
• AINVP — DOUBLE PRECISION array, dimension (NMAX*(NMAX+1)/2).
• 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)).
• IWORK — INTEGER array, dimension (NMAX).
• RWORK — DOUBLE PRECISION array, dimension (max(NMAX,2*NSMAX)).
• NOUT — INTEGER; the unit number for output.

lowkey the parameter docs list IWORK before RWORK, while the signature has rwork then iwork — I kept both exactly as they show up. No fixing, no merging, no cap. 💀

👑 Author 👑

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

Definition at line 154 of file dchktp.f.

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🌟 Author (Doxygen’s auto-generated credit) 🌟

Generated automatically by Doxygen for LAPACK from the source code.

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cute sign-off time: this footer bops with LAPACK Version 3.12.0 and the path /home/abui...IN/dchktp.f(3) — mwah, bestie 💅💖✨