package de.lmu.ifi.dbs.elki.utilities.ensemble;

/*
 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/>.
 */

/**
 * Simple combination rule, by taking the mean
 * 
 * @author Erich Schubert
 */
public class EnsembleVotingMean implements EnsembleVoting {
  /**
   * Constructor.
   */
  public EnsembleVotingMean() {
    // Empty.
  }

  @Override
  public double combine(double[] scores) {
    return combine(scores, scores.length);
  }

  @Override
  public double combine(double[] scores, int count) {
    double sum = 0.;
    for (int i = 0; i < count; i++) {
      sum += scores[i];
    }
    return sum / count;
  }
}