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.