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


1 /* ======================================
2  * JFreeChart : a free Java chart library
3  * ======================================
4  *
5  * Project Info: http://www.jfree.org/jfreechart/index.html
6  * Project Lead: David Gilbert (david.gilbert@object-refinery.com);
7  *
8  * (C) Copyright 2000-2003, by Object Refinery Limited and Contributors.
9  *
10  * This library is free software; you can redistribute it and/or modify it under the terms
11  * of the GNU Lesser General Public License as published by the Free Software Foundation;
12  * either version 2.1 of the License, or (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
15  * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16  * See the GNU Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public License along with this
19  * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20  * Boston, MA 02111-1307, USA.
21  *
22  * ---------------
23  * Function2D.java
24  * ---------------
25  * (C) Copyright 2002, 2003, by Object Refinery Limited.
26  *
27  * Original Author: David Gilbert (for Object Refinery Limited);
28  * Contributor(s): -;
29  *
30  * $Id: Function2D.java,v 1.2 2003/06/04 22:58:27 mungady Exp $
31  *
32  * Changes:
33  * --------
34  * 01-Oct-2002 : Version 1 (DG);
35  *
36  */
37
38 package org.jfree.data;
39
40 /**
41  * A function of the form y = f(x).
42  *
43  * @author David Gilbert
44  */
45 public interface Function2D {
46
47     /**
48      * Returns the value of the function ('y') for a given input ('x').
49      *
50      * @param x the x-value.
51      *
52      * @return the function value.
53      */
54     public double getValue(double x);
55
56 }
57
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