TESTING/MATGEN/slagge.f(3)

NAME
TESTING/MATGEN/slagge.f

SYNOPSIS

  Functions/Subroutines
subroutine slagge (m, n, kl, ku, d, a, lda, iseed, work, info)
SLAGGE

Function/Subroutine Documentation

  subroutine slagge (integer m, integer n, integer kl, integer ku, real, dimension( * ) d, real, dimension( lda, * ) a, integer lda, integer, dimension( 4 ) iseed, real, dimension( * ) work, integer info)

SLAGGE

Purpose:

     SLAGGE generates a real general m by n matrix A, by pre- and post-
     multiplying a real diagonal matrix D with random orthogonal matrices:
     A = U*D*V. The lower and upper bandwidths may then be reduced to
     kl and ku by additional orthogonal transformations.

Parameters
    M

              M is INTEGER
              The number of rows of the matrix A.  M >= 0.

    N

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

    KL

              KL is INTEGER
              The number of nonzero subdiagonals within the band of A.
              0 <= KL <= M-1.

    KU

              KU is INTEGER
              The number of nonzero superdiagonals within the band of A.
              0 <= KU <= N-1.

    D

              D is REAL array, dimension (min(M,N))
              The diagonal elements of the diagonal matrix D.

    A

              A is REAL array, dimension (LDA,N)
              The generated m by n matrix A.

    LDA

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

    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 REAL array, dimension (M+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 112 of file slagge.f.

Author

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