
dtrttp.f(3) LAPACK dtrttp.f(3)
NAME
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 (characterUPLO, integerN, double precision, dimension( lda, * )A,
integerLDA, double precision, dimension( * )AP, integerINFO)
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
NbyN 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 NbyN 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 jth column of A is stored
in the array AP as follows:
if UPLO = 'U', AP(i + (j1)*j/2) = A(i,j) for 1<=i<=j;
if UPLO = 'L', AP(i + (j1)*(2nj)/2) = A(i,j) for j<=i<=n.
INFO
INFO is INTEGER
= 0: successful exit
< 0: if INFO = i, the ith argument had an illegal value
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
September 2012
Definition at line 105 of file dtrttp.f.
Author
Generated automatically by Doxygen for LAPACK from the source code.
Version 3.4.2 Tue Sep 25 2012 dtrttp.f(3) 
