TESTING/LIN/ddrvrfp.f(3)

NAME
TESTING/LIN/ddrvrfp.f

SYNOPSIS

  Functions/Subroutines
subroutine ddrvrfp (nout, nn, nval, nns, nsval, nnt, ntval, thresh, a, asav, afac, ainv, b, bsav, xact, x, arf, arfinv, d_work_dlatms, d_work_dpot01, d_temp_dpot02, d_temp_dpot03, d_work_dlansy, d_work_dpot02, d_work_dpot03)
DDRVRFP

Function/Subroutine Documentation

  subroutine ddrvrfp (integer nout, integer nn, integer, dimension( nn ) nval, integer nns, integer, dimension( nns ) nsval, integer nnt, integer, dimension( nnt ) ntval, double precision thresh, double precision, dimension( * ) a, double precision, dimension( * ) asav, double precision, dimension( * ) afac, double precision, dimension( * ) ainv, double precision, dimension( * ) b, double precision, dimension( * ) bsav, double precision, dimension( * ) xact, double precision, dimension( * ) x, double precision, dimension( * ) arf, double precision, dimension( * ) arfinv, double precision, dimension( * ) d_work_dlatms, double precision, dimension( * ) d_work_dpot01, double precision, dimension( * ) d_temp_dpot02, double precision, dimension( * ) d_temp_dpot03, double precision, dimension( * ) d_work_dlansy, double precision, dimension( * ) d_work_dpot02, double precision, dimension( * ) d_work_dpot03)

DDRVRFP

Purpose:

    !>
    !> DDRVRFP tests the LAPACK RFP routines:
    !>     DPFTRF, DPFTRS, and DPFTRI.
    !>
    !> This testing routine follow the same tests as DDRVPO (test for the full
    !> format Symmetric Positive Definite solver).
    !>
    !> The tests are performed in Full Format, conversion back and forth from
    !> full format to RFP format are performed using the routines DTRTTF and
    !> DTFTTR.
    !>
    !> First, a specific matrix A of size N is created. There is nine types of
    !> different matrixes possible.
    !>  1. Diagonal                        6. Random, CNDNUM = sqrt(0.1/EPS)
    !>  2. Random, CNDNUM = 2              7. Random, CNDNUM = 0.1/EPS
    !> *3. First row and column zero       8. Scaled near underflow
    !> *4. Last row and column zero        9. Scaled near overflow
    !> *5. Middle row and column zero
    !> (* - tests error exits from DPFTRF, no test ratios are computed)
    !> A solution XACT of size N-by-NRHS is created and the associated right
    !> hand side B as well. Then DPFTRF is called to compute L (or U), the
    !> Cholesky factor of A. Then L (or U) is used to solve the linear system
    !> of equations AX = B. This gives X. Then L (or U) is used to compute the
    !> inverse of A, AINV. The following four tests are then performed:
    !> (1) norm( L*L' - A ) / ( N * norm(A) * EPS ) or
    !>     norm( U'*U - A ) / ( N * norm(A) * EPS ),
    !> (2) norm(B - A*X) / ( norm(A) * norm(X) * EPS ),
    !> (3) norm( I - A*AINV ) / ( N * norm(A) * norm(AINV) * EPS ),
    !> (4) ( norm(X-XACT) * RCOND ) / ( norm(XACT) * EPS ),
    !> where EPS is the machine precision, RCOND the condition number of A, and
    !> norm( . ) the 1-norm for (1,2,3) and the inf-norm for (4).
    !> Errors occur when INFO parameter is not as expected. Failures occur when
    !> a test ratios is greater than THRES.
    !>

Parameters
    NOUT

    !>          NOUT is INTEGER
    !>                The unit number for output.
    !>

    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.
    !>

    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.
    !>

    NNT

    !>          NNT is INTEGER
    !>                The number of values of MATRIX TYPE contained in the vector NTVAL.
    !>

    NTVAL

    !>          NTVAL is INTEGER array, dimension (NNT)
    !>                The values of matrix type (between 0 and 9 for PO/PP/PF matrices).
    !>

    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.
    !>

    A

    !>          A is DOUBLE PRECISION array, dimension (NMAX*NMAX)
    !>

    ASAV

    !>          ASAV is DOUBLE PRECISION array, dimension (NMAX*NMAX)
    !>

    AFAC

    !>          AFAC is DOUBLE PRECISION array, dimension (NMAX*NMAX)
    !>

    AINV

    !>          AINV is DOUBLE PRECISION array, dimension (NMAX*NMAX)
    !>

    B

    !>          B is DOUBLE PRECISION array, dimension (NMAX*MAXRHS)
    !>

    BSAV

    !>          BSAV is DOUBLE PRECISION array, dimension (NMAX*MAXRHS)
    !>

    XACT

    !>          XACT is DOUBLE PRECISION array, dimension (NMAX*MAXRHS)
    !>

    X

    !>          X is DOUBLE PRECISION array, dimension (NMAX*MAXRHS)
    !>

    ARF

    !>          ARF is DOUBLE PRECISION array, dimension ((NMAX*(NMAX+1))/2)
    !>

    ARFINV

    !>          ARFINV is DOUBLE PRECISION array, dimension ((NMAX*(NMAX+1))/2)
    !>

    D_WORK_DLATMS

    !>          D_WORK_DLATMS is DOUBLE PRECISION array, dimension ( 3*NMAX )
    !>

    D_WORK_DPOT01

    !>          D_WORK_DPOT01 is DOUBLE PRECISION array, dimension ( NMAX )
    !>

    D_TEMP_DPOT02

    !>          D_TEMP_DPOT02 is DOUBLE PRECISION array, dimension ( NMAX*MAXRHS )
    !>

    D_TEMP_DPOT03

    !>          D_TEMP_DPOT03 is DOUBLE PRECISION array, dimension ( NMAX*NMAX )
    !>

    D_WORK_DLANSY

    !>          D_WORK_DLANSY is DOUBLE PRECISION array, dimension ( NMAX )
    !>

    D_WORK_DPOT02

    !>          D_WORK_DPOT02 is DOUBLE PRECISION array, dimension ( NMAX )
    !>

    D_WORK_DPOT03

    !>          D_WORK_DPOT03 is DOUBLE PRECISION array, dimension ( NMAX )
    !>

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 232 of file ddrvrfp.f.

Author

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