# schkrq.f - Man Page

TESTING/LIN/schkrq.f

## Synopsis

### Functions/Subroutines

subroutine schkrq (dotype, nm, mval, nn, nval, nnb, nbval, nxval, nrhs, thresh, tsterr, nmax, a, af, aq, ar, ac, b, x, xact, tau, work, rwork, iwork, nout)
SCHKRQ

## Function/Subroutine Documentation

### subroutine schkrq (logical, dimension( * ) dotype, integer nm, integer, dimension( * ) mval, integer nn, integer, dimension( * ) nval, integer nnb, integer, dimension( * ) nbval, integer, dimension( * ) nxval, integer nrhs, real thresh, logical tsterr, integer nmax, real, dimension( * ) a, real, dimension( * ) af, real, dimension( * ) aq, real, dimension( * ) ar, real, dimension( * ) ac, real, dimension( * ) b, real, dimension( * ) x, real, dimension( * ) xact, real, dimension( * ) tau, real, dimension( * ) work, real, dimension( * ) rwork, integer, dimension( * ) iwork, integer nout)

SCHKRQ

Purpose:

` SCHKRQ tests SGERQF, SORGRQ and SORMRQ.`
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.```

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.```

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.```

NRHS

```          NRHS is INTEGER
The number of right hand side vectors to be generated for
each linear system.```

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 M or N, used in dimensioning
the work arrays.```

A

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

AF

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

AQ

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

AR

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

AC

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

B

`          B is REAL array, dimension (NMAX*NRHS)`

X

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

XACT

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

TAU

`          TAU is REAL array, dimension (NMAX)`

WORK

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

RWORK

`          RWORK is REAL array, dimension (NMAX)`

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 198 of file schkrq.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

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

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