dzsum1 (l) - Linux Man Pages

dzsum1: takes the sum of the absolute values of a complex vector and returns a double precision result

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 aqgenuineaq 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.