SimpleClusterSimilarity.java

package clustering;

import java.util.List;

import activity.ActivityFrame;
import clustering.ds.CSKSimpleCluster;
import clustering.ds.Instance;
import util.AdjacencyBackedSparseMatrix;
import util.SparseSimMatrix;

public class SimpleClusterSimilarity {
	
	/**
	 * Vol of cluster with input is a 2-D array
	 * @param c
	 * @param simMatrix
	 * @return
	 */
	public static double volOfCluster(CSKSimpleCluster<ActivityFrame> c, double[][] simMatrix){
		List<Instance<ActivityFrame>> members = c.getClusterMembers();
		double sum = 0.0;
		if (members.size() == 1) return 1.0;
		for (int i=0; i<members.size()-1; i++){
			for (int j=i+1; j<members.size(); j++){
				sum += simMatrix[members.get(i).getID()][members.get(j).getID()];
			}
		}
//		System.out.println(sum);
		return sum;
	}
	/**
	 * input is a SparseMatrix
	 * @param c
	 * @param simMatrix
	 * @return
	 */
	public static double volOfCluster(CSKSimpleCluster<ActivityFrame> c, SparseSimMatrix simMatrix){
		List<Instance<ActivityFrame>> members = c.getClusterMembers();
		double sum = 0.0;
		if (members.size() == 1) return 1.0;
		for (int i=0; i<members.size()-1; i++){
			for (int j=i+1; j<members.size(); j++){
				sum += simMatrix.get(members.get(i).getID(), members.get(j).getID());
			}
		}
//		System.out.println(sum);
		return sum;
	}
	/**
	 * Input is DynamicSparseMatrix
	 * @param c
	 * @param simMatrix
	 * @return
	 */
	public static double volOfCluster(CSKSimpleCluster<ActivityFrame> c, AdjacencyBackedSparseMatrix simMatrix){
		List<Instance<ActivityFrame>> members = c.getClusterMembers();
		double sum = 0.0;
		if (members.size() == 1) return 1.0;
		for (int i=0; i<members.size()-1; i++){
			for (int j=i+1; j<members.size(); j++){
				sum += simMatrix.get(members.get(i).getID(), members.get(j).getID());
			}
		}
//		System.out.println(sum);
		return sum;
	}

	/**
	 * 2-D double array
	 * @param c
	 * @param simMatrix
	 * @return
	 */
	public static double averageIntraClusterSimilarity(CSKSimpleCluster<ActivityFrame> c, double[][] simMatrix){
		int n = c.getClusterMembers().size();
		int total = n*(n-1)/2;
		System.out.println(volOfCluster(c, simMatrix)/total);
		return volOfCluster(c, simMatrix)/total;
	}
	/**
	 * SparseMatrix
	 * @param c
	 * @param simMatrix
	 * @return
	 */
	public static double averageIntraClusterSimilarity(CSKSimpleCluster<ActivityFrame> c, SparseSimMatrix simMatrix){
		int n = c.getClusterMembers().size();
		int total = n*(n-1)/2;
		double vol = volOfCluster(c, simMatrix)/total;
		System.out.println(vol);
		return vol;
	}
	
	/**
	 * DynamicSparseMatrix
	 * @param c
	 * @param simMatrix
	 * @return
	 */
	public static double averageIntraClusterSimilarity(CSKSimpleCluster<ActivityFrame> c, AdjacencyBackedSparseMatrix simMatrix){
		int n = c.getClusterMembers().size();
		int total = n*(n-1)/2;
		double vol = volOfCluster(c, simMatrix)/total;
		System.out.println(vol);
		return vol;
	}
	
	/**
	 * 2-d double array
	 * @param c1
	 * @param c2
	 * @param simMatrix
	 * @return
	 */
	public static double volOfInterClusters(CSKSimpleCluster<ActivityFrame> c1, 
			CSKSimpleCluster<ActivityFrame> c2, double[][] simMatrix){
		List<Instance<ActivityFrame>> members1 = c1.getClusterMembers();
		List<Instance<ActivityFrame>> members2 = c2.getClusterMembers();
		double sum = 0.0;
		for (int i=0; i<members1.size(); i++){
			for (int j=0; j<members2.size(); j++){
				sum += simMatrix[members1.get(i).getID()][members2.get(j).getID()];
			}
		}
		return sum;
	}
	/**
	 * sparseMatrix
	 * @param c1
	 * @param c2
	 * @param simMatrix
	 * @return
	 */
	public static double volOfInterClusters(CSKSimpleCluster<ActivityFrame> c1, 
			CSKSimpleCluster<ActivityFrame> c2, SparseSimMatrix simMatrix){
		List<Instance<ActivityFrame>> members1 = c1.getClusterMembers();
		List<Instance<ActivityFrame>> members2 = c2.getClusterMembers();
		double sum = 0.0;
		for (int i=0; i<members1.size(); i++){
			for (int j=0; j<members2.size(); j++){
				sum += simMatrix.get(members1.get(i).getID(),members2.get(j).getID());
			}
		}
		return sum;
	}
	/**
	 * DynamicSparseMatrix
	 * @param c1
	 * @param c2
	 * @param simMatrix
	 * @return
	 */
	public static double volOfInterClusters(CSKSimpleCluster<ActivityFrame> c1, 
			CSKSimpleCluster<ActivityFrame> c2, AdjacencyBackedSparseMatrix simMatrix){
		List<Instance<ActivityFrame>> members1 = c1.getClusterMembers();
		List<Instance<ActivityFrame>> members2 = c2.getClusterMembers();
		double sum = 0.0;
		for (int i=0; i<members1.size(); i++){
			for (int j=0; j<members2.size(); j++){
				sum += simMatrix.get(members1.get(i).getID(),members2.get(j).getID());
			}
		}
		return sum;
	}
	
	public static double averageInterClusterSimilarity(CSKSimpleCluster<ActivityFrame> c1, 
			CSKSimpleCluster<ActivityFrame> c2, double[][] simMatrix){
		int total = c1.getClusterMembers().size() * c2.getClusterMembers().size();
		return volOfInterClusters(c1, c2, simMatrix)/total;
	}
}