stpttr.f File Reference

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Functions/Subroutines
subroutine	stpttr (UPLO, N, AP, A, LDA, INFO)
	STPTTR copies a triangular matrix from the standard packed format (TP) to the standard full format (TR).

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Function/Subroutine Documentation

subroutine stpttr	(	character	UPLO,
		integer	N,
		real, dimension( * )	AP,
		real, dimension( lda, * )	A,
		integer	LDA,
		integer	INFO
	)

STPTTR copies a triangular matrix from the standard packed format (TP) to the standard full format (TR).

Download STPTTR + dependencies [TGZ] [ZIP] [TXT]

Purpose:

 STPTTR copies a triangular matrix A from standard packed format (TP)
 to standard full format (TR).

Parameters:

[in]	UPLO	UPLO is CHARACTER*1 = 'U': A is upper triangular. = 'L': A is lower triangular.
[in]	N	N is INTEGER The order of the matrix A. N >= 0.
[in]	AP	AP is REAL array, dimension ( N*(N+1)/2 ), On entry, 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.
[out]	A	A is REAL 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.
[in]	LDA	LDA is INTEGER The leading dimension of the array A. LDA >= max(1,N).
[out]	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:

September 2012

Definition at line 105 of file stpttr.f.

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