/*
 * Copyright (c) 2012-2018, Peter Abeles. All Rights Reserved.
 *
 * This file is part of DDogleg (http://ddogleg.org).
 *
 * 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.ddogleg.fitting.modelset;

import java.util.List;


/**
 * Computes the mean of a set of points.
 *
 * @author Peter Abeles
 */
public class MeanModelFitter implements ModelFitter<double[],Double> ,
		ModelGenerator<double[],Double>{

	@Override
	public boolean generate(List<Double> dataSet, double[] param ) {
		return fitModel(dataSet,null,param);
	}

	@Override
	public boolean fitModel(List<Double> dataSet, double[] initParam, double[] foundParam) {
		double mean = 0;

		for (double d : dataSet) {
			mean += d;
		}

		mean /= dataSet.size();

		foundParam[0] = mean;

		return true;
	}

	@Override
	public double getFitScore() {
		return 0;
	}

	@Override
	public int getMinimumPoints() {
		return 1;
	}
}
