dzsum1()

double precision function dzsum1	(	integer	n,
		complex*16, dimension( * )	cx,
		integer	incx )

DZSUM1 forms the 1-norm of the complex vector using the true absolute value.

Download DZSUM1 + dependencies [TGZ] [ZIP] [TXT]

Purpose:

!>
!> DZSUM1 takes the sum of the absolute values of a complex
!> vector and returns a double precision result.
!>
!> Based on DZASUM from the Level 1 BLAS.
!> The change is to use the 'genuine' absolute value.
!> 

Parameters

[in]	N	!> N is INTEGER !> The number of elements in the vector CX. !>
[in]	CX	!> CX is COMPLEX*16 array, dimension (N) !> The vector whose elements will be summed. !>
[in]	INCX	!> INCX is INTEGER !> The spacing between successive values of CX. INCX > 0. !>

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Contributors:

Nick Higham for use with ZLACON.