dtrttp.f

Section: LAPACK (3)
Updated: Tue Nov 14 2017
Page Index
 

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 (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.

Date:

June 2017

Definition at line 106 of file dtrttp.f.  

Author

Generated automatically by Doxygen for LAPACK from the source code.


 

Index

NAME
SYNOPSIS
Functions/Subroutines
Function/Subroutine Documentation
subroutine dtrttp (character UPLO, integer N, double precision, dimension( lda, * ) A, integer LDA, double precision, dimension( * ) AP, integer INFO)
Author
LinuxReviews : manual page archive : man3