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JFreeChart is a class library, written in Java, for generating charts.
Utilising the Java2D APIs, it currently supports bar charts, pie charts,
line charts, XY-plots and time series plots.
/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2020, 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.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* -------------------------------
* StatisticalCategoryDataset.java
* -------------------------------
* (C) Copyright 2002-2020, by Pascal Collet and Contributors.
*
* Original Author: Pascal Collet;
* Contributor(s): David Gilbert (for Object Refinery Limited);
*
*/
package org.jfree.data.statistics;
import org.jfree.data.category.CategoryDataset;
/**
* A category dataset that defines a mean and standard deviation value for
* each item.
*/
public interface StatisticalCategoryDataset extends CategoryDataset {
/**
* Returns the mean value for an item.
*
* @param row the row index (zero-based).
* @param column the column index (zero-based).
*
* @return The mean value (possibly {@code null}).
*/
public Number getMeanValue(int row, int column);
/**
* Returns the mean value for an item.
*
* @param rowKey the row key.
* @param columnKey the columnKey.
*
* @return The mean value (possibly {@code null}).
*/
public Number getMeanValue(Comparable rowKey, Comparable columnKey);
/**
* Returns the standard deviation value for an item.
*
* @param row the row index (zero-based).
* @param column the column index (zero-based).
*
* @return The standard deviation (possibly {@code null}).
*/
public Number getStdDevValue(int row, int column);
/**
* Returns the standard deviation value for an item.
*
* @param rowKey the row key.
* @param columnKey the columnKey.
*
* @return The standard deviation (possibly {@code null}).
*/
public Number getStdDevValue(Comparable rowKey, Comparable columnKey);
}