# schkpb.f - Man Page

TESTING/LIN/schkpb.f

## Synopsis

### Functions/Subroutines

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

## 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.`
Parameters

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.```

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 dimension N.```

NNB

```          NNB is INTEGER
The number of values of NB contained in the vector NBVAL.```

NBVAL

```          NBVAL is INTEGER array, dimension (NNB)
The values of the blocksize NB.```

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.```

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.```

NMAX

```          NMAX is INTEGER
The maximum value permitted for N, used in dimensioning the
work arrays.```

A

`          A is REAL array, dimension (NMAX*NMAX)`

AFAC

`          AFAC is REAL array, dimension (NMAX*NMAX)`

AINV

`          AINV is REAL array, dimension (NMAX*NMAX)`

B

```          B is REAL array, dimension (NMAX*NSMAX)
where NSMAX is the largest entry in NSVAL.```

X

`          X is REAL array, dimension (NMAX*NSMAX)`

XACT

`          XACT is REAL array, dimension (NMAX*NSMAX)`

WORK

```          WORK is REAL array, dimension
(NMAX*max(3,NSMAX))```

RWORK

```          RWORK is REAL array, dimension
(max(NMAX,2*NSMAX))```

IWORK

`          IWORK is INTEGER array, dimension (NMAX)`

NOUT

```          NOUT is INTEGER
The unit number for output.```
Author

Univ. of Tennessee

Univ. of California Berkeley

NAG Ltd.

Definition at line 169 of file schkpb.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page schkpb(3) is an alias of schkpb.f(3).

Tue Nov 28 2023 12:08:43 Version 3.12.0 LAPACK