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( ∗ )

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.

  —  LAPACK version 2.0  —  08 October 1994