/*
* 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;
/**
* Computes the square of the empirical corellation coefficient 'r' between
* label and prediction. Eith P=prediction, L=label, V=Variance, Cov=Covariance
* we calculate r by: <br>
* Cov(L,P) / sqrt(V(L)*V(P)). Uses the calculation of the superclass.
*
* @author Ingo Mierswa
* @version $Id: SquaredCorrelationCriterion.java,v 2.7 2006/03/21 15:35:51
* ingomierswa Exp $
*/
public class SquaredCorrelationCriterion extends CorrelationCriterion {
private static final long serialVersionUID = 8751373179064203312L;
public String getDescription() {
return "Returns the squared correlation coefficient between the label and predicted label.";
}
public double getMikroAverage() {
double r = super.getMikroAverage();
return r * r;
}
public String getName() {
return "squared_correlation";
}
}