alibCount

alibCount

Counts the nonzero (true) values in an array. The PV-WAVE API for this routine is the WHERE Function.

Prototypes

wvlong alibCountb( wvlong n, UCHAR *b )

wvlong alibCounts( wvlong n, short *b )

wvlong alibCounti( wvlong n, int *b )

wvlong alibCountl( wvlong n, wvlong *b )

wvlong alibCountf( wvlong n, float *b )

wvlong alibCountd( wvlong n, double *b )

wvlong alibCountc( wvlong n, COMPLEX *b )

wvlong alibCountz( wvlong n, DCOMPLEX *b )

Parameters

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

*b — (Input) The source array.

Return value

The number of nonzero elements in the source array.

Example

#include <stdio.h>

#include <stdlib.h>

#include <math.h>

#include "alib.h"

void main() {

   /* make some example data */

   UCHAR    b[ 8] = {0,1,0,2,0,3,0,4};

   COMPLEX  c[16] = {0,0,0,1,0,0,2,0,0,0,3,4,0,0,0,0};

   wvlong nb, nc;

   printf( "\n print the real and complex arrays \n" );

   printf( " and the number of nonzero elements in each" );

      alibinit( NULL, NULL, NULL, NULL );

      alibPrintArrayb( 1, 1, 1, 8, b, NULL );

      alibPrintArrayc( 1, 1, 1, 8, c, NULL );

      nb = alibCountb( 8, b );

      nc = alibCountc( 8, c );

   printf( "\n number of nonzero elements in b: %4lld \n", nb );

   printf( "\n number of nonzero elements in c: %4lld \n", nc );

Output:

 print the real and complex arrays

 and the number of nonzero elements in each

   0   1   0   2   0   3   0   4

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

(  2.000e+00,  0.000e+00) (  0.000e+00,  0.000e+00) (  3.000e+00,  4.000e+00)

(  0.000e+00,  0.000e+00) (  0.000e+00,  0.000e+00)

 number of nonzero elements in b:    4

 number of nonzero elements in c:    3

Version 2017.0