/*
* 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.performance;
/**
* The absolute error: <i>Sum(|label-predicted|)/#examples</i>. Mean absolue
* error is the average of the difference between predicted and actual value in
* all test cases; it is the average prediction error.
*
* @author Ingo Mierswa
* @version $Id: AbsoluteError.java,v 1.3 2008/05/09 19:22:43 ingomierswa Exp $
*/
public class AbsoluteError extends SimpleCriterion {
private static final long serialVersionUID = 1113614384637128963L;
public AbsoluteError() {
}
public AbsoluteError(AbsoluteError ae) {
super(ae);
}
public double countExample(double label, double predictedLabel) {
double dif = Math.abs(label - predictedLabel);
return dif;
}
public String getName() {
return "absolute_error";
}
public String getDescription() {
return "Average absolute deviation of the prediction from the actual value";
}
}