/* $Id$
*
* This file is a part of jPapaBench providing a Java implementation
* of PapaBench project.
* Copyright (C) 2010 Michal Malohlava <michal.malohlava_at_d3s.mff.cuni.cz>
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
package papabench.core.utils;
import java.util.Random;
/**
* Statistics related functions.
*
* @author Michal Malohlava
*
*/
final public class StatsUtils {
public static float randNormalDistribution(float mu, float sigma) {
Random random = new Random();
float u1 = random.nextFloat();
float u2 = random.nextFloat();
return (float) (mu + sigma * Math.sqrt(-2 * Math.log(u1)) * Math.cos(2*Math.PI * u2));
}
}