/* ===========================================================

 * JFreeChart : a free chart library for the Java(tm) platform

 * ===========================================================

 *

 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.

 *

 * Project Info:  http://www.jfree.org/jfreechart/index.html

 *

 * This library 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 2.1 of the License, or (at your option) any later version.

 *

 * This library 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 this

 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,

 * Boston, MA 02111-1307, USA.

 *

 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 

 * in the United States and other countries.]

 *

 * -----------------------------

 * MeanAndStandardDeviation.java

 * -----------------------------

 * (C) Copyright 2003, 2004, by Object Refinery Limited.

 *

 * Original Author:  David Gilbert (for Object Refinery Limited);

 * Contributor(s):   -;

 *

 * $Id: MeanAndStandardDeviation.java,v 1.1 2004/08/31 15:32:24 mungady Exp $

 *

 * Changes:

 * --------

 * 05-Feb-2002 : Version 1 (DG);

 *

 */



package org.jfree.data.statistics;



/**

 * A simple data structure that holds a mean value and a standard deviation value.  This

 * is used in the {@link org.jfree.data.statistics.DefaultStatisticalCategoryDataset} class.

 */

public class MeanAndStandardDeviation {



    /** The mean. */

    private Number mean;



    /** The standard deviation. */

    private Number standardDeviation;



    /**

     * Creates a new mean and standard deviation record.

     *

     * @param mean  the mean.

     * @param standardDeviation  the standard deviation.

     */

    public MeanAndStandardDeviation(Number mean, Number standardDeviation) {

        this.mean = mean;

        this.standardDeviation = standardDeviation;

    }



    /**

     * Returns the mean.

     *

     * @return The mean.

     */

    public Number getMean() {

        return this.mean;

    }



    /**

     * Returns the standard deviation.

     *

     * @return The standard deviation.

     */

    public Number getStandardDeviation() {

        return this.standardDeviation;

    }



}

