/*
* RapidMiner
*
* Copyright (C) 2001-2011 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.sampling.sequences;
import com.rapidminer.tools.RandomGenerator;
/**
* This class provides a sampling sequence, where each element will have the given
* probability to be part of the sample.
*
* @author Sebastian Land
*/
public class ProbabilitySamplingSequenceGenerator extends SamplingSequenceGenerator {
private double fraction;
public ProbabilitySamplingSequenceGenerator(double fraction, RandomGenerator random) {
super(random);
this.fraction = fraction;
}
@Override
public boolean useNext() {
return random.nextDouble() < fraction;
}
}