001    /* ===========================================================
002     * JFreeChart : a free chart library for the Java(tm) platform
003     * ===========================================================
004     *
005     * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
006     *
007     * Project Info:  http://www.jfree.org/jfreechart/index.html
008     *
009     * This library is free software; you can redistribute it and/or modify it 
010     * under the terms of the GNU Lesser General Public License as published by 
011     * the Free Software Foundation; either version 2.1 of the License, or 
012     * (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but 
015     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
016     * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
017     * License for more details.
018     *
019     * You should have received a copy of the GNU Lesser General Public
020     * License along with this library; if not, write to the Free Software
021     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
022     * USA.  
023     *
024     * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
025     * in the United States and other countries.]
026     *
027     * -------------------------------
028     * StatisticalCategoryDataset.java
029     * -------------------------------
030     * (C) Copyright 2002-2005, by Pascal Collet and Contributors.
031     *
032     * Original Author:  Pascal Collet;
033     * Contributor(s):   David Gilbert (for Object Refinery Limited);
034     *
035     * $Id: StatisticalCategoryDataset.java,v 1.2.2.1 2005/10/25 21:34:46 mungady Exp $
036     *
037     * Changes
038     * -------
039     * 21-Aug-2002 : Version 1, contributed by Pascal Collet (DG);
040     * 07-Oct-2002 : Fixed errors reported by Checkstyle (DG);
041     * 24-Oct-2002 : Amendments in line with changes to the CategoryDataset 
042     *               interface (DG);
043     *
044     */
045    
046    package org.jfree.data.statistics;
047    
048    import org.jfree.data.category.CategoryDataset;
049    
050    /**
051     * A category dataset that defines a median and standard deviation value for 
052     * each item.
053     *
054     * @author Pascal Collet
055     */
056    public interface StatisticalCategoryDataset extends CategoryDataset {
057    
058        /**
059         * Returns the mean value for an item.
060         *
061         * @param row  the row index (zero-based).
062         * @param column  the column index (zero-based).
063         *
064         * @return The mean value.
065         */
066        public Number getMeanValue(int row, int column);
067    
068        /**
069         * Returns the mean value for an item.
070         *
071         * @param rowKey  the row key.
072         * @param columnKey  the columnKey.
073         *
074         * @return The mean value.
075         */
076        public Number getMeanValue(Comparable rowKey, Comparable columnKey);
077    
078        /**
079         * Returns the standard deviation value for an item.
080         *
081         * @param row  the row index (zero-based).
082         * @param column  the column index (zero-based).
083         *
084         * @return The standard deviation.
085         */
086        public Number getStdDevValue(int row, int column);
087    
088        /**
089         * Returns the standard deviation value for an item.
090         *
091         * @param rowKey  the row key.
092         * @param columnKey  the columnKey.
093         *
094         * @return The standard deviation.
095         */
096        public Number getStdDevValue(Comparable rowKey, Comparable columnKey);
097    
098    }
099