/**
* 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.features.selection;
import com.rapidminer.operator.features.Individual;
import com.rapidminer.operator.features.IndividualOperator;
import java.util.LinkedList;
import java.util.List;
/**
* This PopulationOperator realises forward selection, i.e. creates a list of clones of each
* individual and switches on one attribute in each of the clones. In contrast to the normal forward
* selection this one actually selects attributes instead of completely adding them. Although this
* might use more memory for simple selection tasks this might be necessary in case of
* FeatureOperators which generate new attributes.
*
* @author Ingo Mierswa ingomierswa Exp $
*/
public class SwitchingForwardSelection extends IndividualOperator {
@Override
public List<Individual> operate(Individual individual) {
double[] weights = individual.getWeightsClone();
List<Individual> l = new LinkedList<Individual>();
for (int i = 0; i < weights.length; i++) {
if (weights[i] == 0.0d) {
double[] clone = individual.getWeightsClone();
clone[i] = 1.0d;
l.add(new Individual(clone));
}
}
return l;
}
}