dzsum1(l) - Linux man page

Name

DZSUM1 - takes 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.