SRC/dtrttp.f(3)

NAME
SRC/dtrttp.f

SYNOPSIS

  Functions/Subroutines
subroutine dtrttp (uplo, n, a, lda, ap, info)
DTRTTP copies a triangular matrix from the standard full format (TR) to the standard packed format (TP).

Function/Subroutine Documentation

  subroutine dtrttp (character uplo, integer n, double precision, dimension( lda, * ) a, integer lda, double precision, dimension( * ) ap, integer info)

DTRTTP copies a triangular matrix from the standard full format (TR) to the standard packed format (TP).

Purpose:

     DTRTTP copies a triangular matrix A from full format (TR) to standard
     packed format (TP).

Parameters
    UPLO

              UPLO is CHARACTER*1
              = 'U':  A is upper triangular.
              = 'L':  A is lower triangular.

    N

              N is INTEGER
              The order of the matrices AP and A.  N >= 0.

    A

              A is DOUBLE PRECISION array, dimension (LDA,N)
              On exit, the triangular matrix A.  If UPLO = 'U', the leading
              N-by-N upper triangular part of A contains the upper
              triangular part of the matrix A, and the strictly lower
              triangular part of A is not referenced.  If UPLO = 'L', the
              leading N-by-N lower triangular part of A contains the lower
              triangular part of the matrix A, and the strictly upper
              triangular part of A is not referenced.

    LDA

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

    AP

              AP is DOUBLE PRECISION array, dimension (N*(N+1)/2)
              On exit, 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(i + (j-1)*j/2) = A(i,j) for 1<=i<=j;
              if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = A(i,j) for j<=i<=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 103 of file dtrttp.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.