/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* OutputClusterDistribution.java
* Copyright (C) 2009 University of Waikato, Hamilton, New Zealand
*/
package wekaexamples.clusterers;
import weka.clusterers.EM;
import weka.core.Instances;
import weka.core.Utils;
import weka.core.converters.ConverterUtils.DataSource;
/**
* This example class builds an EM clusterer on a dataset and outputs for
* a second dataset the predicted cluster, as well as the cluster membership.
*
* @author FracPete (fracpete at waikato dot ac dot nz)
* @version $Revision$
*/
public class OutputClusterDistribution {
/**
* Expects two parameters: training file and test file.
*
* @param args the commandline arguments
* @throws Exception if something goes wrong
*/
public static void main(String[] args) throws Exception {
// load data
Instances train = DataSource.read(args[0]);
Instances test = DataSource.read(args[1]);
if (!train.equalHeaders(test))
throw new IllegalArgumentException(
"Train and test set are not compatible: " + train.equalHeadersMsg(test));
// build clusterer
EM clusterer = new EM();
clusterer.buildClusterer(train);
// output predictions
System.out.println("# - cluster - distribution");
for (int i = 0; i < test.numInstances(); i++) {
int cluster = clusterer.clusterInstance(test.instance(i));
double[] dist = clusterer.distributionForInstance(test.instance(i));
System.out.print((i+1));
System.out.print(" - ");
System.out.print(cluster);
System.out.print(" - ");
System.out.print(Utils.arrayToString(dist));
System.out.println();
}
}
}