#include <grass/cluster.h>
int I_cluster_clear(struct Cluster *C)
{
    C->points = NULL;
    C->band_sum = NULL;
    C->band_sum2 = NULL;
    C->class = NULL;
    C->reclass = NULL;
    C->count = NULL;
    C->countdiff = NULL;
    C->sum = NULL;
    C->sumdiff = NULL;
    C->sum2 = NULL;
    C->mean = NULL;
    C->nbands = 0;
    I_init_signatures(&C->S, 0);

    return 0;
}