NAME

TESTING/EIG/dckgsv.f

SYNOPSIS

Functions/Subroutines

subroutine dckgsv (nm, mval, pval, nval, nmats, iseed, thresh, nmax, a, af, b, bf, u, v, q, alpha, beta, r, iwork, work, rwork, nin, nout, info)
DCKGSV

Function/Subroutine Documentation

subroutine dckgsv (integer nm, integer, dimension( * ) mval, integer, dimension( * ) pval, integer, dimension( * ) nval, integer nmats, integer, dimension( 4 ) iseed, double precision thresh, integer nmax, double precision, dimension( * ) a, double precision, dimension( * ) af, double precision, dimension( * ) b, double precision, dimension( * ) bf, double precision, dimension( * ) u, double precision, dimension( * ) v, double precision, dimension( * ) q, double precision, dimension( * ) alpha, double precision, dimension( * ) beta, double precision, dimension( * ) r, integer, dimension( * ) iwork, double precision, dimension( * ) work, double precision, dimension( * ) rwork, integer nin, integer nout, integer info)

DCKGSV

Purpose:



 DCKGSV tests DGGSVD:


        the GSVD for M-by-N matrix A and P-by-N matrix B.

Parameters



          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.

PVAL



          PVAL is INTEGER array, dimension (NP)


          The values of the matrix row dimension P.

NVAL



          NVAL is INTEGER array, dimension (NN)


          The values of the matrix column 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 DOUBLE PRECISION


          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 is DOUBLE PRECISION array, dimension (NMAX*NMAX)



          AF is DOUBLE PRECISION array, dimension (NMAX*NMAX)



          B is DOUBLE PRECISION array, dimension (NMAX*NMAX)



          BF is DOUBLE PRECISION array, dimension (NMAX*NMAX)



          U is DOUBLE PRECISION array, dimension (NMAX*NMAX)



          V is DOUBLE PRECISION array, dimension (NMAX*NMAX)



          Q is DOUBLE PRECISION array, dimension (NMAX*NMAX)

ALPHA



          ALPHA is DOUBLE PRECISION array, dimension (NMAX)

BETA



          BETA is DOUBLE PRECISION array, dimension (NMAX)



          R is DOUBLE PRECISION array, dimension (NMAX*NMAX)

IWORK



          IWORK is INTEGER array, dimension (NMAX)

WORK



          WORK is DOUBLE PRECISION array, dimension (NMAX*NMAX)

RWORK



          RWORK is DOUBLE PRECISION 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 DLATMS returns an error code, the absolute value


                 of it is returned.

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 195 of file dckgsv.f.

Author

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