/**
* Copyright (C) 2001-2017 by RapidMiner and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapidminer.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;
/**
* Returns a checkerboard classification function. Each tile has size 5. Attribute values should be
* positive.
*
* @author Ingo Mierswa
*/
public class CheckerboardClassificationFunction extends ClassificationFunction {
private static final double NUMBER = 5.0d;
@Override
public double calculate(double[] att) throws FunctionException {
if (att.length != 2) {
throw new FunctionException("Checkerboard classification function", "needs 2 attributes!");
}
if ((int) (att[0] / NUMBER) % 2 == 0) {
if ((int) (att[1] / NUMBER) % 2 == 0) {
return getLabel().getMapping().mapString("positive");
} else {
return getLabel().getMapping().mapString("negative");
}
} else {
if ((int) (att[1] / NUMBER) % 2 == 0) {
return getLabel().getMapping().mapString("negative");
} else {
return getLabel().getMapping().mapString("positive");
}
}
}
@Override
public int getMinNumberOfAttributes() {
return 2;
}
@Override
public int getMaxNumberOfAttributes() {
return 2;
}
}