001 /* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2009, 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 2002-2009, by Pascal Collet and Contributors.
031 *
032 * Original Author: Pascal Collet;
033 * Contributor(s): David Gilbert (for Object Refinery Limited);
034 *
035 * Changes
036 * -------
037 * 21-Aug-2002 : Version 1, contributed by Pascal Collet (DG);
038 * 07-Oct-2002 : Fixed errors reported by Checkstyle (DG);
039 * 24-Oct-2002 : Amendments in line with changes to the CategoryDataset
040 * interface (DG);
041 * ------------- JFREECHART 1.0.x ---------------------------------------------
042 * 02-Feb-2007 : Removed author tags from all over JFreeChart sources (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 mean and standard deviation value for
052 * each item.
053 */
054 public interface StatisticalCategoryDataset extends CategoryDataset {
055
056 /**
057 * Returns the mean value for an item.
058 *
059 * @param row the row index (zero-based).
060 * @param column the column index (zero-based).
061 *
062 * @return The mean value (possibly <code>null</code>).
063 */
064 public Number getMeanValue(int row, int column);
065
066 /**
067 * Returns the mean value for an item.
068 *
069 * @param rowKey the row key.
070 * @param columnKey the columnKey.
071 *
072 * @return The mean value (possibly <code>null</code>).
073 */
074 public Number getMeanValue(Comparable rowKey, Comparable columnKey);
075
076 /**
077 * Returns the standard deviation value for an item.
078 *
079 * @param row the row index (zero-based).
080 * @param column the column index (zero-based).
081 *
082 * @return The standard deviation (possibly <code>null</code>).
083 */
084 public Number getStdDevValue(int row, int column);
085
086 /**
087 * Returns the standard deviation value for an item.
088 *
089 * @param rowKey the row key.
090 * @param columnKey the columnKey.
091 *
092 * @return The standard deviation (possibly <code>null</code>).
093 */
094 public Number getStdDevValue(Comparable rowKey, Comparable columnKey);
095
096 }
097