SRC/dtrttp.f(3)            Library Functions Manual            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.

LAPACK                          Version 3.12.0                 SRC/dtrttp.f(3)