/*
* 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.
*/
/*
* BatchFiltering.java
* Copyright (C) 2009 University of Waikato, Hamilton, New Zealand
*/
package wekaexamples.filters;
import weka.core.Instances;
import weka.core.converters.ConverterUtils.DataSink;
import weka.core.converters.ConverterUtils.DataSource;
import weka.filters.Filter;
import weka.filters.unsupervised.attribute.Standardize;
/**
* Filters two datasets: the first is used to initialize the filter and the
* second one is filtered according to this setup.
* <p/>
* Standardize is used as filter in this example.
*
* @author FracPete (fracpete at waikato dot ac dot nz)
* @version $Revision: 5628 $
*/
public class BatchFiltering {
/**
* Expects four parameters: two input files and two output files.
*
* @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]);
// filter data
Standardize filter = new Standardize();
filter.setInputFormat(train); // initializing the filter once with training set
Instances newTrain = Filter.useFilter(train, filter); // configures the Filter based on train instances and returns filtered instances
Instances newTest = Filter.useFilter(test, filter); // create new test set
// save data
DataSink.write(args[2], newTrain);
DataSink.write(args[3], newTest);
}
}