NAME

dzsum1 - take the sum of the absolute values of a complex vector and returns a double precision result

SYNOPSIS

DOUBLE PRECISION FUNCTION DZSUM1( N, CX, INCX )

INTEGER INCX, N

COMPLEX∗16 CX( ∗ )

#include <sunperf.h>

double dzsum1(int n, doublecomplex ∗cx, int incx) ;

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.
 
Contributed by Nick Higham for use with ZLACON.
 

ARGUMENTS

N (input) INTEGER
The number of elements in the vector CX.

CX (input) COMPLEX∗16 array, dimension (N)
The vector whose elements will be summed.

INCX (input) INTEGER
The spacing between successive values of CX.  INCX > 0.

SunOS 5.0  —  Last change: 10 Dec 1998