alibArg

alibArg

Returns the angle of each element in a complex array. The PV-WAVE API for this routine is the ATAN Function.

Prototypes

void alibArgc( wvlong n, COMPLEX *p, float *r )

void alibArgz( wvlong n, DCOMPLEX *p, double *r )

Parameters

n — (Input) The number of elements in the source array.

*p — (Input) The n-element source array.

*r — (Input/Output) The n-element destination array. On return, array r contains the angle of each element in array p.

Example

#include <stdio.h>

#include <stdlib.h>

#include <math.h>

#include "alib.h"

void main() {

   /* make up some input data for the examples */

   COMPLEX  c0[8]={-1,-1,0,-2,3,-3,1,0,2,2,0,4,-5,5,-4,0};

   /* make an output array */

   float  c[8];

   printf( "\n\n print (4,2) matrix c0" );

      alibinit( NULL, NULL, NULL, NULL );

      alibPrintArrayc( 1, 1, 4, 2, c0, NULL );

   printf( "\n\n print the angle for each element in c0" );

      alibArgc( 8, c0, c );

      alibPrintArrayf( 1, 1, 4, 2, c, NULL );

Output:

 print (4,2) matrix c0

( -1.000e+00, -1.000e+00) (  0.000e+00, -2.000e+00)

(  3.000e+00, -3.000e+00) (  1.000e+00,  0.000e+00)

(  2.000e+00,  2.000e+00) (  0.000e+00,  4.000e+00)

( -5.000e+00,  5.000e+00) ( -4.000e+00,  0.000e+00)

 print the angle for each element in c0

  -2.356e+00  -1.571e+00

  -7.854e-01   0.000e+00

   7.854e-01   1.571e+00

   2.356e+00   3.142e+00

Version 2017.0