Randn.java example

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universal-java-matrix-package-master
/*
 * Copyright (C) 2008-2015 by Holger Arndt
 *
 * This file is part of the Universal Java Matrix Package (UJMP).
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership and licensing.
 *
 * UJMP is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * UJMP 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with UJMP; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA  02110-1301  USA
 */

package org.ujmp.core.doublematrix.calculation.entrywise.creators;

import org.ujmp.core.Matrix;
import org.ujmp.core.doublematrix.calculation.AbstractDoubleCalculation;
import org.ujmp.core.util.MathUtil;

public class Randn extends AbstractDoubleCalculation {
	private static final long serialVersionUID = 3846626738610954086L;

	private double mean = 0.0;

	private double sigma = 1.0;

	public Randn(Matrix matrix) {
		super(matrix);
	}

	public Randn(Matrix matrix, double mean, double sigma) {
		super(matrix);
		this.mean = mean;
		this.sigma = sigma;
	}

	public double getDouble(long... coordinates) {
		return MathUtil.nextGaussian(mean, sigma);
	}

}