dtpttr (l)  Linux Man Pages
dtpttr: copies a triangular matrix A from standard packed format (TP) to standard full format (TR)
Command to display dtpttr
manual in Linux: $ man l dtpttr
NAME
DTPTTR  copies a triangular matrix A from standard packed format (TP) to standard full format (TR)
SYNOPSIS
 SUBROUTINE DTPTTR(

UPLO, N, AP, A, LDA, INFO )

CHARACTER
UPLO

INTEGER
INFO, N, LDA

DOUBLE
PRECISION A( LDA, * ), AP( * )
PURPOSE
DTPTTR copies a triangular matrix A from standard packed format (TP)
to standard full format (TR).
ARGUMENTS
 UPLO (input) CHARACTER

= aqUaq: A is upper triangular.
= aqLaq: A is lower triangular.
 N (input) INTEGER

The order of the matrix A. N >= 0.
 AP (input) DOUBLE PRECISION array, dimension ( N*(N+1)/2 ),

On entry, 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 = aqUaq, AP(i + (j1)*j/2) = A(i,j) for 1<=i<=j;
if UPLO = aqLaq, AP(i + (j1)*(2nj)/2) = A(i,j) for j<=i<=n.
 A (output) DOUBLE PRECISION array, dimension ( LDA, N )

On exit, the triangular matrix A. If UPLO = aqUaq, 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 = aqLaq, 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 (input) INTEGER

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

= 0: successful exit
< 0: if INFO = i, the ith argument had an illegal value
Pages related to dtpttr
 dtpttr (3)
 dtpttf (l)  copies a triangular matrix A from standard packed format (TP) to rectangular full packed format (TF)
 dtptri (l)  computes the inverse of a real upper or lower triangular matrix A stored in packed format
 dtptrs (l)  solves a triangular system of the form A * X = B or A**T * X = B,
 dtpcon (l)  estimates the reciprocal of the condition number of a packed triangular matrix A, in either the 1norm or the infinitynorm
 dtpmv (l)  performs one of the matrixvector operations x := A*x, or x := Aaq*x,
 dtprfs (l)  provides error bounds and backward error estimates for the solution to a system of linear equations with a triangular packed coefficient matrix
 dtpsv (l)  solves one of the systems of equations A*x = b, or Aaq*x = b,