alibImaginary

RWalib C Array Library User Guide > Type Conversion > alibImaginary

alibImaginary

Returns imaginary part of each element in a complex array (for the real part see alibFloat or alibDouble). The PV-WAVE API for this routine is the IMAGINARY Function.

Prototypes

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

void alibImaginaryz( 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 is the imaginary part of array p, i.e., r[j] = p[j].i.

Example

#include <stdio.h>

#include <stdlib.h>

#include <math.h>

#include "alib.h"

void main() {

    COMPLEX  c[9] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17};

    float *f;

    f = (float*)malloc(9*sizeof(float));

    alibinit( NULL, NULL, NULL, NULL );

    printf( "\n\n print the input array" );

    alibPrintArrayc( 1, 1, 3, 3, c, NULL );

    printf( "\n\n compute and print the result array" );

    alibImaginaryc( 9, c, f );

    alibPrintArrayf( 1, 1, 3, 3, f, NULL );

Output:

 print the input array

(    0.0e+00    1.0e+00 ) (    2.0e+00    3.0e+00 ) (    4.0e+00    5.0e+00 )

(    6.0e+00    7.0e+00 ) (    8.0e+00    9.0e+00 ) (    1.0e+01    1.1e+01 )

(    1.2e+01    1.3e+01 ) (    1.4e+01    1.5e+01 ) (    1.6e+01    1.7e+01 )

 compute and print the result array

    1.00e+00    3.00e+00    5.00e+00

    7.00e+00    9.00e+00    1.10e+01

    1.30e+01    1.50e+01    1.70e+01

Version 2017.1