TESTING/LIN/dlattp.f(3)

NAME
TESTING/LIN/dlattp.f

SYNOPSIS

  Functions/Subroutines
subroutine dlattp (imat, uplo, trans, diag, iseed, n, a, b, work, info)
DLATTP

Function/Subroutine Documentation

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

DLATTP

Purpose:

     DLATTP generates a triangular test matrix in packed storage.
     IMAT and UPLO uniquely specify the properties of the test
     matrix, which is returned in the array AP.

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 (N*(N+1)/2)
              The upper or lower triangular matrix A, packed columnwise in
              a linear array.  The j-th column of A is stored in the array
              AP as follows:
              if UPLO = 'U', AP((j-1)*j/2 + i) = A(i,j) for 1<=i<=j;
              if UPLO = 'L',
                 AP((j-1)*(n-j) + j*(j+1)/2 + i-j) = A(i,j) for j<=i<=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 123 of file dlattp.f.

Author

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