/*
* 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.preprocessing.filter;
import com.rapidminer.example.Attribute;
import com.rapidminer.example.Example;
import com.rapidminer.operator.OperatorDescription;
import com.rapidminer.tools.Tools;
/**
* Converts all numerical attributes to nominal ones. Each numerical value is simply
* used as nominal value of the new attribute. If the value is missing, the new value
* will be missing. Please note that this operator might drastically increase memory
* usage if many different numerical values are used. Please use the available discretization
* operators then.
*
* @author Ingo Mierswa
* @version $Id: NumericToPolynominal.java,v 1.5 2008/05/09 19:22:58 ingomierswa Exp $
*/
public class NumericToPolynominal extends NumericToNominal {
public NumericToPolynominal(OperatorDescription description) {
super(description);
}
protected void setValue(Example example, Attribute newAttribute, double value) {
if (Double.isNaN(value)) {
example.setValue(newAttribute, Double.NaN);
} else {
example.setValue(newAttribute, newAttribute.getMapping().mapString(Tools.formatIntegerIfPossible(value, -1)));
}
}
}