TESTING/LIN/sdrvls.f(3)

🌸 NAME 🌸

TESTING/LIN/sdrvls.f — okay bestie, this is the TESTING/LIN/sdrvls.f(3) page, and the manual name is Library Functions Manual. It's the home of the sdrvls subroutine, and yes, she's iconic 💅.

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✨ SYNOPSIS ✨

🌈 Functions/Subroutines 🌈

       subroutine sdrvls (dotype, nm, mval, nn, nval, nns, nsval, nnb, nbval,
           nxval, thresh, tsterr, a, copya, b, copyb, c, s, copys, nout)
           SDRVLS

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💖 Function/Subroutine Documentation 💖

   subroutine sdrvls (logical, dimension( * ) dotype, integer nm, integer,
       dimension( * ) mval, integer nn, integer, dimension( * ) nval, integer
       nns, integer, dimension( * ) nsval, integer nnb, integer, dimension( * )
       nbval, integer, dimension( * ) nxval, real thresh, logical tsterr, real,
       dimension( * ) a, real, dimension( * ) copya, real, dimension( * ) b,
       real, dimension( * ) copyb, real, dimension( * ) c, real, dimension( * )
       s, real, dimension( * ) copys, integer nout)
       SDRVLS

🌟 Purpose 🌟

SDRVLS tests the least squares driver routines SGELS, SGELST, SGETSLS, SGELSS, SGELSY and SGELSD. That's the whole vibe check, fr fr 🔥.

🎀 Parameters 🎀

• DOTYPE — DOTYPE is LOGICAL array, dimension (NTYPES). These are 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. The matrix of type j is generated as follows:
  • j=1: A = U*D*V where U and V are random orthogonal matrices and D has random entries (> 0.1) taken from a uniform distribution (0,1). A is full rank.
  • j=2: The same of 1, but A is scaled up.
  • j=3: The same of 1, but A is scaled down.
  • j=4: A = U*D*V where U and V are random orthogonal matrices and D has 3*min(M,N)/4 random entries (> 0.1) taken from a uniform distribution (0,1) and the remaining entries set to 0. A is rank-deficient.
  • j=5: The same of 4, but A is scaled up.
  • j=6: The same of 5, but A is scaled down.
• NM — NM is INTEGER. The number of values of M contained in the vector MVAL.
• MVAL — MVAL is INTEGER array, dimension (NM). The values of the matrix row dimension M.
• NN — NN is INTEGER. The number of values of N contained in the vector NVAL.
• NVAL — NVAL is INTEGER array, dimension (NN). The values of the matrix column dimension N.
• 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.
• NNB — NNB is INTEGER. The number of values of NB and NX contained in the vectors NBVAL and NXVAL. The blocking parameters are used in pairs (NB,NX).
• NBVAL — NBVAL is INTEGER array, dimension (NNB). The values of the blocksize NB.
• NXVAL — NXVAL is INTEGER array, dimension (NNB). The values of the crossover point NX.
• THRESH — THRESH is 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.
• TSTERR — TSTERR is LOGICAL. Flag that indicates whether error exits are to be tested.
• A — A is REAL array, dimension (MMAX*NMAX) where MMAX is the maximum value of M in MVAL and NMAX is the maximum value of N in NVAL.
• COPYA — COPYA is REAL array, dimension (MMAX*NMAX).
• B — B is REAL array, dimension (MMAX*NSMAX) where MMAX is the maximum value of M in MVAL and NSMAX is the maximum value of NRHS in NSVAL.
• COPYB — COPYB is REAL array, dimension (MMAX*NSMAX).
• C — C is REAL array, dimension (MMAX*NSMAX).
• S — S is REAL array, dimension (min(MMAX,NMAX)).
• COPYS — COPYS is REAL array, dimension (min(MMAX,NMAX)).
• NOUT — NOUT is INTEGER. The unit number for output.

👑 Author 👑

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

Definition at line 189 of file sdrvls.f.

🧚 Author 🧚

Generated automatically by Doxygen for LAPACK from the source code.

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No cap, the footer energy is LAPACK Version 3.12.0 and the page tag is TESTING/LIN/sdrvls.f(3) — slay, you made it to the end, bestie 🫶💖✨