/*
* RapidMiner
*
* Copyright (C) 2001-2008 by Rapid-I and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapid-i.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.operator.features.transformation;
import com.rapidminer.example.ExampleSet;
import com.rapidminer.operator.OperatorDescription;
import Jama.Matrix;
import Jama.SingularValueDecomposition;
/**
* A dimensionality reduction method based on Singular Value Decomposition. TODO: see super class
*
* @author Michael Wurst, Ingo Mierswa
* @version $Id: SVDReduction.java,v 1.4 2008/05/09 19:22:51 ingomierswa Exp $
*
*/
public class SVDReduction extends JamaDimensionalityReduction {
public SVDReduction(OperatorDescription description) {
super(description);
}
protected Matrix callMatrixMethod(ExampleSet es, int dimensions, Matrix in) {
SingularValueDecomposition svd = new SingularValueDecomposition(in);
Matrix u = svd.getU().getMatrix(0, es.size() - 1, 0, dimensions - 1);
return u;
}
}