NAG FL Interface
f06hgf (znegv)

Settings help

FL Name Style:

FL Specification Language:

1 Purpose

f06hgf negates a complex vector.

2 Specification

Fortran Interface
Subroutine f06hgf ( n, x, incx)
Integer, Intent (In) :: n, incx
Complex (Kind=nag_wp), Intent (Inout) :: x(*)
C Header Interface
#include <nag.h>
void  f06hgf_ (const Integer *n, Complex x[], const Integer *incx)
The routine may be called by the names f06hgf or nagf_blas_znegv.

3 Description

f06hgf performs the operation
where x is an n-element complex vector scattered with stride incx.

4 References


5 Arguments

1: n Integer Input
On entry: n, the number of elements in x.
2: x(*) Complex (Kind=nag_wp) array Input/Output
Note: the dimension of the array x must be at least max(1, 1+(n-1) ×incx ) .
On entry: the n-element vector x. xi must be stored in x(1+(i-1)×incx), for i=1,2,,n.
Intermediate elements of x are not referenced.
On exit: the vector -x stored in the array elements used to supply the original vector x.
Intermediate elements of x are unchanged.
3: incx Integer Input
On entry: the increment in the subscripts of x between successive elements of x.
Constraint: incx>0.

6 Error Indicators and Warnings


7 Accuracy

Not applicable.

8 Parallelism and Performance

f06hgf is not threaded in any implementation.

9 Further Comments


10 Example