# sckgqr.f - Man Page

TESTING/EIG/sckgqr.f

## Synopsis

### Functions/Subroutines

subroutine sckgqr (nm, mval, np, pval, nn, nval, nmats, iseed, thresh, nmax, a, af, aq, ar, taua, b, bf, bz, bt, bwk, taub, work, rwork, nin, nout, info)
SCKGQR

## Function/Subroutine Documentation

### subroutine sckgqr (integer nm, integer, dimension( * ) mval, integer np, integer, dimension( * ) pval, integer nn, integer, dimension( * ) nval, integer nmats, integer, dimension( 4 ) iseed, real thresh, integer nmax, real, dimension( * ) a, real, dimension( * ) af, real, dimension( * ) aq, real, dimension( * ) ar, real, dimension( * ) taua, real, dimension( * ) b, real, dimension( * ) bf, real, dimension( * ) bz, real, dimension( * ) bt, real, dimension( * ) bwk, real, dimension( * ) taub, real, dimension( * ) work, real, dimension( * ) rwork, integer nin, integer nout, integer info)

SCKGQR

Purpose:

``` SCKGQR tests
SGGQRF: GQR factorization for N-by-M matrix A and N-by-P matrix B,
SGGRQF: GRQ factorization for M-by-N matrix A and P-by-N matrix B.```
Parameters

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(column) dimension M.```

NP

```          NP is INTEGER
The number of values of P contained in the vector PVAL.```

PVAL

```          PVAL is INTEGER array, dimension (NP)
The values of the matrix row(column) dimension P.```

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(row) dimension N.```

NMATS

```          NMATS is INTEGER
The number of matrix types to be tested for each combination
of matrix dimensions.  If NMATS >= NTYPES (the maximum
number of matrix types), then all the different types are
generated for testing.  If NMATS < NTYPES, another input line
is read to get the numbers of the matrix types to be used.```

ISEED

```          ISEED is INTEGER array, dimension (4)
On entry, the seed of the random number generator.  The array
elements should be between 0 and 4095, otherwise they will be
reduced mod 4096, and ISEED(4) must be odd.
On exit, the next seed in the random number sequence after
all the test matrices have been generated.```

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.```

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)`

TAUA

`          TAUA is REAL array, dimension (NMAX)`

B

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

BF

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

BZ

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

BT

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

BWK

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

TAUB

`          TAUB is REAL array, dimension (NMAX)`

WORK

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

RWORK

`          RWORK is REAL array, dimension (NMAX)`

NIN

```          NIN is INTEGER
The unit number for input.```

NOUT

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

INFO

```          INFO is INTEGER
= 0 :  successful exit
> 0 :  If SLATMS returns an error code, the absolute value
of it is returned.```
Author

Univ. of Tennessee

Univ. of California Berkeley

NAG Ltd.

Definition at line 207 of file sckgqr.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

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

Tue Nov 28 2023 12:08:42 Version 3.12.0 LAPACK