c_merge.c

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/*!
   \file cluster/c_merge.c
 
   \brief Cluster library - Merge
 
   (C) 2001-2009 by the GRASS Development Team
 
   This program is free software under the GNU General Public License
   (>=v2). Read the file COPYING that comes with GRASS for details.
 
   \author Original author CERL
 */
 
#include <grass/cluster.h>
 
/*!
   \brief ?
 
   \param C pointer to Cluster structure
 
   \return 0
 */
int I_cluster_merge(struct Cluster *C)
{
    int band, p;
    int c1, c2;
 
    c1 = C->merge1;
    c2 = C->merge2;
 
    for (p = 0; p < C->npoints; p++)
        if (C->class[p] == c2)
            C->class[p] = c1;
    C->count[c1] += C->count[c2];
    C->count[c2] = 0;
    for (band = 0; band < C->nbands; band++) {
        C->sum[band][c1] += C->sum[band][c2];
        C->sum[band][c2] = 0;
    }
 
    return 0;
}