TESTING/LIN/slattp.f(3)

NAME
TESTING/LIN/slattp.f

SYNOPSIS

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

Function/Subroutine Documentation

  subroutine slattp (integer imat, character uplo, character trans, character diag, integer, dimension( 4 ) iseed, integer n, real, dimension( * ) a, real, dimension( * ) b, real, dimension( * ) work, integer info)

SLATTP

Purpose:

    !>
    !> SLATTP 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
    !>          SLATMS).  Modified on exit.
    !>

    N

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

    A

    !>          A is REAL 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 REAL array, dimension (N)
    !>          The right hand side vector, if IMAT > 10.
    !>

    WORK

    !>          WORK is REAL 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 slattp.f.

Author

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