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#include <grass/cluster.h>
/* compute sum of squares for each class */
int I_cluster_sum2(struct Cluster *C)
{
int p, band, class;
double q;
/*
fprintf (stderr, "I_cluster_sum2(npoints=%d,nclasses=%d,nbands=%d)\n", C->npoints, C->nclasses, C->nbands);
*/
for (class = 0; class < C->nclasses; class++)
for (band = 0; band < C->nbands; band++)
C->sum2[band][class] = 0;
for (p = 0; p < C->npoints; p++) {
class = C->class[p];
if (class < 0)
continue;
for (band = 0; band < C->nbands; band++) {
q = C->points[band][p];
C->sum2[band][class] += q * q;
}
}
return 0;
}
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