TESTING/LIN/dlattr.f(3)

NAME
TESTING/LIN/dlattr.f

SYNOPSIS

  Functions/Subroutines
subroutine dlattr (imat, uplo, trans, diag, iseed, n, a, lda, b, work, info)
DLATTR

Function/Subroutine Documentation

  subroutine dlattr (integer imat, character uplo, character trans, character diag, integer, dimension( 4 ) iseed, integer n, double precision, dimension( lda, * ) a, integer lda, double precision, dimension( * ) b, double precision, dimension( * ) work, integer info)

DLATTR

Purpose:

     DLATTR generates a triangular test matrix.
     IMAT and UPLO uniquely specify the properties of the test
     matrix, which is returned in the array A.

Parameters
    IMAT

              IMAT is INTEGER
              An integer key describing which matrix to generate for this
              path.

    UPLO

              UPLO is CHARACTER*1
              Specifies whether the matrix A will be upper or lower
              triangular.
              = 'U':  Upper triangular
              = 'L':  Lower triangular

    TRANS

              TRANS is CHARACTER*1
              Specifies whether the matrix or its transpose will be used.
              = 'N':  No transpose
              = 'T':  Transpose
              = 'C':  Conjugate transpose (= Transpose)

    DIAG

              DIAG is CHARACTER*1
              Specifies whether or not the matrix A is unit triangular.
              = 'N':  Non-unit triangular
              = 'U':  Unit triangular

    ISEED

              ISEED is INTEGER array, dimension (4)
              The seed vector for the random number generator (used in
              DLATMS).  Modified on exit.

    N

              N is INTEGER
              The order of the matrix to be generated.

    A

              A is DOUBLE PRECISION array, dimension (LDA,N)
              The triangular matrix A.  If UPLO = 'U', the leading n by n
              upper triangular part of the array A contains the upper
              triangular matrix, and the strictly lower triangular part of
              A is not referenced.  If UPLO = 'L', the leading n by n lower
              triangular part of the array A contains the lower triangular
              matrix, and the strictly upper triangular part of A is not
              referenced.  If DIAG = 'U', the diagonal elements of A are
              set so that A(k,k) = k for 1 <= k <= n.

    LDA

              LDA is INTEGER
              The leading dimension of the array A.  LDA >= max(1,N).

    B

              B is DOUBLE PRECISION array, dimension (N)
              The right hand side vector, if IMAT > 10.

    WORK

              WORK is DOUBLE PRECISION array, dimension (3*N)

    INFO

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

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 131 of file dlattr.f.

Author

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