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package de.lmu.ifi.dbs.elki.math.statistics.distribution.estimator;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2015
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
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/>.
*/
import de.lmu.ifi.dbs.elki.math.StatisticalMoments;
import de.lmu.ifi.dbs.elki.math.statistics.distribution.Distribution;
import de.lmu.ifi.dbs.elki.utilities.datastructures.arraylike.NumberArrayAdapter;
/**
* Abstract base class for estimators based on the statistical moments.
*
* @author Erich Schubert
* @since 0.5.0
*
* @param <D> Distribution to generate.
*/
public abstract class AbstractMOMEstimator<D extends Distribution> implements MOMDistributionEstimator<D> {
/**
* Constructor.
*/
public AbstractMOMEstimator() {
super();
}
@Override
public abstract D estimateFromStatisticalMoments(StatisticalMoments moments);
@Override
public <A> D estimate(A data, NumberArrayAdapter<?, A> adapter) {
StatisticalMoments mv = new StatisticalMoments();
int size = adapter.size(data);
for (int i = 0; i < size; i++) {
final double val = adapter.getDouble(data, i);
if (Double.isInfinite(val) || Double.isNaN(val)) {
continue;
}
mv.put(val);
}
return estimateFromStatisticalMoments(mv);
}
@Override
public String toString() {
return this.getClass().getSimpleName();
}
}
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