sound.musicg.math.statistics.DataCentroid Maven / Gradle / Ivy

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/*
 * Copyright (C) 2011 Jacquet Wong
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package sound.musicg.math.statistics;

/**
 * Evaluate the centroid of an array
 * 
 * @author Jacquet Wong
 *
 */
public class DataCentroid extends MathStatistics{
	
	public DataCentroid(){
		
	}
	
	public DataCentroid(double[] values){
		setValues(values);
	}
		
	public double evaluate(){
		double sumCentroid=0;
		double sumIntensities=0;
		int size=values.length;
		
		for (int i=0; i0){
				sumCentroid+=i*values[i];
				sumIntensities+=values[i];
			}
		}
		double avgCentroid=sumCentroid/sumIntensities;
		
		return avgCentroid;
	}
}