dtpttr man page on Scientific

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DTPTTR(1LAPACK routine (version 3.2)				     DTPTTR(1)

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
	       = 'U':  A is upper triangular.
	       = 'L':  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 columÔÇÉ
	       nwise 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.

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

       INFO    (output) INTEGER
	       = 0:  successful exit
	       < 0:  if INFO = -i, the i-th argument had an illegal value

 LAPACK routine (version 3.2)	 November 2008			     DTPTTR(1)
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