ctrttp.f File Reference

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

---

Function/Subroutine Documentation

subroutine ctrttp	(	character	UPLO,
		integer	N,
		complex, dimension( lda, * )	A,
		integer	LDA,
		complex, dimension( * )	AP,
		integer	INFO
	)

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

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

Purpose:

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

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 matrices AP and A. N >= 0.
[in]	A	A is COMPLEX array, dimension (LDA,N) On entry, 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]	AP	AP is COMPLEX 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.
[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 ctrttp.f.

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