double Silhouette::a(Cluster::itObjectsOfCluster itAObjectsOnCluster, Partition::itClustersOfPartition itAClusterOnPartition, RelationSDN *pARelation){
double dSimilarity = 0;
for(Cluster::itObjectsOfCluster itObjectsOnCluster2 = itAClusterOnPartition->begin(); itObjectsOnCluster2 != itAClusterOnPartition->end(); itObjectsOnCluster2++){
//TODO VER O QUE FAZER
//dSimilarity += pARelation->getSimilarityMatrix()->getSimilarity((*itAObjectsOnCluster), (*itObjectsOnCluster2));
}
return dSimilarity / itAClusterOnPartition->getNumberOfObjects();
}
double Silhouette::calculate(Partition *pAPartition, RelationSDN *pARelation, DataSet *pADataset){
//Declaration variables used by Silhouette
double silhouette = 0;
// # retirar Similarity *pObjSimilarity = pARelation->getSimilarity();
//cout << pAPartition->getPartitionName() << endl;
//Walk vector of all clusters
for (Partition::itClustersOfPartition itClusterOnPartition = pAPartition->begin(); itClusterOnPartition != pAPartition->end(); itClusterOnPartition++){
double silPartial = 0;
//Walk each object of cluster
for(Cluster::itObjectsOfCluster itObjectsOnCluster1 = itClusterOnPartition->begin(); itObjectsOnCluster1 != itClusterOnPartition->end(); itObjectsOnCluster1++){
double dAxi = a(itObjectsOnCluster1, itClusterOnPartition, pARelation);
double dBxi, dSxi;
if (pARelation->getSimilarity()->isSimilarity()){
dBxi = bSimilarity(itObjectsOnCluster1, itClusterOnPartition, pAPartition, pARelation);
if (dAxi > dBxi)
dSxi = 1 - (dBxi / dAxi);
else if (dAxi == dBxi)
dSxi = 0;
else
dSxi = (dAxi / dBxi) - 1;
}
else {
dBxi = bDissimilarity(itObjectsOnCluster1, itClusterOnPartition, pAPartition, pARelation);
if (dAxi < dBxi)
dSxi = 1 - (dAxi / dBxi);
else if (dAxi == dBxi)
dSxi = 0;
else
dSxi = (dBxi / dAxi) - 1;
}
silhouette += dSxi;
silPartial += dSxi;
}
#ifdef IID
cout << pAPartition->getPartitionName();
cout << "\tSIL \tcluster " << itClusterOnPartition->getLabel() << " \t(" << itClusterOnPartition->getNumberOfObjects() << " objects):\t" << silPartial/itClusterOnPartition->getNumberOfObjects() << endl;
#endif
}
silhouette = silhouette / pAPartition->getNumObjects();
return silhouette;
}