TESTING/MATGEN/dlarge.f(3)

NAME
TESTING/MATGEN/dlarge.f

SYNOPSIS

  Functions/Subroutines
subroutine dlarge (n, a, lda, iseed, work, info)
DLARGE

Function/Subroutine Documentation

  subroutine dlarge (integer n, double precision, dimension( lda, * ) a, integer lda, integer, dimension( 4 ) iseed, double precision, dimension( * ) work, integer info)

DLARGE

Purpose:

     DLARGE pre- and post-multiplies a real general n by n matrix A
     with a random orthogonal matrix: A = U*D*U'.

Parameters
    N

              N is INTEGER
              The order of the matrix A.  N >= 0.

    A

              A is DOUBLE PRECISION array, dimension (LDA,N)
              On entry, the original n by n matrix A.
              On exit, A is overwritten by U*A*U' for some random
              orthogonal matrix U.

    LDA

              LDA is INTEGER
              The leading dimension of the array A.  LDA >= N.

    ISEED

              ISEED is INTEGER array, dimension (4)
              On entry, the seed of the random number generator; the array
              elements must be between 0 and 4095, and ISEED(4) must be
              odd.
              On exit, the seed is updated.

    WORK

              WORK is DOUBLE PRECISION array, dimension (2*N)

    INFO

              INFO is INTEGER
              = 0: successful exit
              < 0: if INFO = -i, the i-th argument had an illegal value

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 86 of file dlarge.f.

Author

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