home | career | drupal | java | mac | mysql | perl | scala | uml | unix  

jfreechart example source code file (MatrixSeries.java)

This example jfreechart source code file (MatrixSeries.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

double, double, io, matrixseries, matrixseries, number, number, serializable, serializable, series

The jfreechart MatrixSeries.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, 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.]
 *
 * -----------------
 * MatrixSeries.java
 * -----------------
 * (C) Copyright 2003-2008, by Barak Naveh and Contributors.
 *
 * Original Author:  Barak Naveh;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *                   Zhitao Wang;
 *
 * Changes
 * -------
 * 10-Jul-2003 : Version 1 contributed by Barak Naveh (DG);
 * 10-Feb-2004 : Fixed Checkstyle complaints (DG);
 * 21-May-2004 : Fixed bug 940188 - problem in getItemColumn() and
 *               getItemRow() (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 27-Nov-2006 : Fixed bug in equals() method (DG);
 * 02-Feb-2007 : Removed author tags all over JFreeChart sources (DG);
 *
 */

package org.jfree.data.xy;

import java.io.Serializable;

import org.jfree.data.general.Series;

/**
 * Represents a dense matrix M[i,j] where each Mij item of the matrix has a
 * value (default is 0).
 */
public class MatrixSeries extends Series implements Serializable {

    /** For serialization. */
    private static final long serialVersionUID = 7934188527308315704L;

    /** Series matrix values */
    protected double[][] data;

    /**
     * Constructs a new matrix series.
     * <p>
     * By default, all matrix items are initialzed to 0.
     * </p>
     *
     * @param name  series name (<code>null not permitted).
     * @param rows  the number of rows.
     * @param columns  the number of columns.
     */
    public MatrixSeries(String name, int rows, int columns) {
        super(name);
        this.data = new double[rows][columns];
        zeroAll();
    }

    /**
     * Returns the number of columns in this matrix series.
     *
     * @return The number of columns in this matrix series.
     */
    public int getColumnsCount() {
        return this.data[0].length;
    }


    /**
     * Return the matrix item at the specified index.  Note that this method
     * creates a new <code>Double instance every time it is called.
     *
     * @param itemIndex item index.
     *
     * @return The matrix item at the specified index.
     *
     * @see #get(int, int)
     */
    public Number getItem(int itemIndex) {
        int i = getItemRow(itemIndex);
        int j = getItemColumn(itemIndex);

        Number n = new Double(get(i, j));

        return n;
    }


    /**
     * Returns the column of the specified item.
     *
     * @param itemIndex the index of the item.
     *
     * @return The column of the specified item.
     */
    public int getItemColumn(int itemIndex) {
        //assert itemIndex >= 0 && itemIndex < getItemCount();
        return itemIndex % getColumnsCount();
    }


    /**
     * Returns the number of items in the series.
     *
     * @return The item count.
     */
    public int getItemCount() {
        return getRowCount() * getColumnsCount();
    }


    /**
     * Returns the row of the specified item.
     *
     * @param itemIndex the index of the item.
     *
     * @return The row of the specified item.
     */
    public int getItemRow(int itemIndex) {
        //assert itemIndex >= 0 && itemIndex < getItemCount();
        return itemIndex / getColumnsCount();
    }


    /**
     * Returns the number of rows in this matrix series.
     *
     * @return The number of rows in this matrix series.
     */
    public int getRowCount() {
        return this.data.length;
    }


    /**
     * Returns the value of the specified item in this matrix series.
     *
     * @param i the row of the item.
     * @param j the column of the item.
     *
     * @return The value of the specified item in this matrix series.
     *
     * @see #getItem(int)
     * @see #update(int, int, double)
     */
    public double get(int i, int j) {
        return this.data[i][j];
    }


    /**
     * Updates the value of the specified item in this matrix series.
     *
     * @param i the row of the item.
     * @param j the column of the item.
     * @param mij the new value for the item.
     *
     * @see #get(int, int)
     */
    public void update(int i, int j, double mij) {
        this.data[i][j] = mij;
        fireSeriesChanged();
    }


    /**
     * Sets all matrix values to zero and sends a
     * {@link org.jfree.data.general.SeriesChangeEvent} to all registered
     * listeners.
     */
    public void zeroAll() {
        int rows = getRowCount();
        int columns = getColumnsCount();

        for (int row = 0; row < rows; row++) {
            for (int column = 0; column < columns; column++) {
                this.data[row][column] = 0.0;
            }
        }
        fireSeriesChanged();
    }

    /**
     * Tests this object instance for equality with an arbitrary object.
     *
     * @param obj  the object (<code>null permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof MatrixSeries)) {
            return false;
        }
        MatrixSeries that = (MatrixSeries) obj;
        if (!(getRowCount() == that.getRowCount())) {
            return false;
        }
        if (!(getColumnsCount() == that.getColumnsCount())) {
            return false;
        }
        for (int r = 0; r < getRowCount(); r++) {
            for (int c = 0; c < getColumnsCount(); c++) {
                if (get(r, c) != that.get(r, c)) {
                    return false;
                }
            }
        }
        return super.equals(obj);
    }

}

Other jfreechart examples (source code examples)

Here is a short list of links related to this jfreechart MatrixSeries.java source code file:



my book on functional programming

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.