dzsum13lapack
Takes the sum of the absolute values of a complex vector and returns a double precision result
Usage
- 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. |