dckgsv.f3
Usage
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
!> 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
!> A is DOUBLE PRECISION array, dimension (NMAX*NMAX) !>
AF
!> AF is DOUBLE PRECISION array, dimension (NMAX*NMAX) !>
B
!> B is DOUBLE PRECISION array, dimension (NMAX*NMAX) !>
BF
!> BF is DOUBLE PRECISION array, dimension (NMAX*NMAX) !>
U
!> U is DOUBLE PRECISION array, dimension (NMAX*NMAX) !>
V
!> V is DOUBLE PRECISION array, dimension (NMAX*NMAX) !>
Q
!> 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
!> 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.