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File org.jfree.data.function.NormalDistributionFunction2D.java

Here you can find all the information about the file org.jfree.data.function.NormalDistributionFunction2D.java. You may explore it here or download it onto your local disk.
/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2005, 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
 * USA.  
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * ---------------------------------
 * NormalDistributionFunction2D.java
 * ---------------------------------
 * (C)opyright 2004, 2005, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: NormalDistributionFunction2D.java,v 1.3.2.2 2005/11/21 10:58:33 mungady Exp $
 *
 * Changes
 * -------
 * 25-May-2004 : Version 1 (DG);
 * 21-Nov-2005 : Added getters for the mean and standard deviation (DG);
 * 
 */


package org.jfree.data.function;

/**
 * A normal distribution function.
 */

public class NormalDistributionFunction2D implements Function2D {

    /** The mean. */
    private double mean;

    /** The standard deviation. */
    private double std;

    /**
     * Constructs a new normal distribution function.
     *
     * @param mean  the mean.
     * @param std  the standard deviation.
     */

    public NormalDistributionFunction2D(double mean, double std) {
        this.mean = mean;
        this.std = std;
    }
    
    /**
     * Returns the mean for the function.
     * 
     * @return The mean.
     */

    public double getMean() {
        return this.mean;
    }
    
    /**
     * Returns the standard deviation for the function.
     * 
     * @return The standard deviation.
     */

    public double getStandardDeviation() {
        return this.std;
    }

    /**
     * Returns the function value.
     *
     * @param x  the x-value.
     *
     * @return The value.
     */

    public double getValue(double x) {
        return Math.exp(-1.0 * (x - this.mean) * (x - this.mean) 
                / (2 * this.std * this.std)) / Math.sqrt(2 * Math.PI 
                * this.std * this.std);
    }

}

File Information:

file name:NormalDistributionFunction2D.java
package:org.jfree.data.function
qualified name:org.jfree.data.function.NormalDistributionFunction2D.java
file type:Java Source File
download location:download http://dgpf.sourceforge.net/source/org/jfree/data/function/NormalDistributionFunction2D.java
size:2.954 KB (3025 B)
uploaded: 2018-01-07 12:03:36 GMT+0000
last update: 2006-08-25 12:16:44 GMT+0000
last access: 2018-01-07 12:03:36 GMT+0000

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Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/project-web/dgpf/htdocs/scripts/datetime.php on line 16

Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/project-web/dgpf/htdocs/scripts/datetime.php on line 16
last modified at 2018-01-07 12:03:34 GMT+0000
Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/project-web/dgpf/htdocs/scripts/datetime.php on line 19

Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/project-web/dgpf/htdocs/scripts/datetime.php on line 19
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