/*
* 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.generator;
/** The label is positive if (sin(att1*att2) + sin(att1+att2)) > 0.
*
* @author Ingo Mierswa
* @version $Id: SinusClassificationFunction.java,v 1.3 2008/05/09 19:22:50 ingomierswa Exp $
*/
public class SinusClassificationFunction extends ClassificationFunction {
public double calculate(double[] att) throws FunctionException {
if (att.length < 2)
throw new FunctionException("Sinus classification function", "needs at least 2 attributes!");
if (Math.sin(att[0] * att[1]) + Math.sin(att[0] + att[1]) > 0)
return getLabel().getMapping().mapString("positive");
else
return getLabel().getMapping().mapString("negative");
}
}