// Copyright (C) 2014 Guibing Guo
//
// This file is part of LibRec.
//
// LibRec is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// LibRec 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with LibRec. If not, see <http://www.gnu.org/licenses/>.
//

package librec.baseline;

import librec.data.SparseMatrix;
import librec.intf.Recommender;
import librec.util.Randoms;

/**
 * Baseline: predict by a random value in (minRate, maxRate)
 * 
 * @author guoguibing
 * 
 */
public class RandomGuess extends Recommender {

	public RandomGuess(SparseMatrix trainMatrix, SparseMatrix testMatrix, int fold) {
		super(trainMatrix, testMatrix, fold);

		algoName = "Random";
	}

	@Override
	protected double predict(int u, int j) {
		return Randoms.uniform(minRate, maxRate);
	}

}
