SDRVLS tests the least squares driver routines SGELS, SGELST,


 SGETSLS, SGELSS, SGELSY and SGELSD.

DOTYPE

          DOTYPE is 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.


          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.

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