/**
 * Copyright 2010 Neuroph Project http://neuroph.sourceforge.net
 *
 * 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 org.neuroph.core.input;

import java.io.Serializable;
import java.util.Vector;

/**
 * Calculates the input vector intensity.
 * 
 * @author Zoran Sevarac <sevarac@gmail.com>
 */
public class Intensity extends SummingFunction implements Serializable {

	/**
	 * The class fingerprint that is set to indicate serialization
	 * compatibility with a previous version of the class.
	 */	
	private static final long serialVersionUID = 2L;
	
	public double getOutput(Vector<Double> inputVector) {
		double sum = 0;
		for(Double input : inputVector) {
			sum = sum + Math.pow(input.doubleValue(), 2);
		} 
		
		return Math.sqrt(sum);
	}

}
