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Java > Open Source Codes > org > jfree > data > function > Function2D


1 /* ===========================================================
2  * JFreeChart : a free chart library for the Java(tm) platform
3  * ===========================================================
4  *
5  * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
6  *
7  * Project Info: http://www.jfree.org/jfreechart/index.html
8  *
9  * This library is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU Lesser General Public License as published by
11  * the Free Software Foundation; either version 2.1 of the License, or
12  * (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17  * License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22  * USA.
23  *
24  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
25  * in the United States and other countries.]
26  *
27  * ---------------
28  * Function2D.java
29  * ---------------
30  * (C) Copyright 2002-2005 by Object Refinery Limited.
31  *
32  * Original Author: David Gilbert (for Object Refinery Limited);
33  * Contributor(s): -;
34  *
35  * $Id: Function2D.java,v 1.3.2.1 2005/10/25 21:31:32 mungady Exp $
36  *
37  * Changes:
38  * --------
39  * 01-Oct-2002 : Version 1 (DG);
40  * 20-Jan-2005 : Minor Javadoc update (DG);
41  *
42  */
43
44 package org.jfree.data.function;
45
46 /**
47  * A function of the form <code>y = f(x)</code>.
48  */
49 public interface Function2D {
50
51     /**
52      * Returns the value of the function ('y') for a given input ('x').
53      *
54      * @param x the x-value.
55      *
56      * @return The function value.
57      */
58     public double getValue(double x);
59
60 }
61
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