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Java > Open Source Codes > org > apache > commons > math > distribution > GammaDistribution


1 /*
2  * Copyright 2003-2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.apache.commons.math.distribution;
17
18 /**
19  * The Gamma Distribution.
20  *
21  * Instances of GammaDistribution objects should be created using
22  * {@link DistributionFactory#createGammaDistribution(double,double)}.
23  *
24  * <p>
25  * References:
26  * <ul>
27  * <li><a HREF="http://mathworld.wolfram.com/GammaDistribution.html">
28  * Gamma Distribution</a></li>
29  * </ul>
30  * </p>
31  *
32  * @version $Revision$ $Date: 2005-02-26 05:11:52 -0800 (Sat, 26 Feb 2005) $
33  */
34 public interface GammaDistribution extends ContinuousDistribution {
35     /**
36      * Modify the shape parameter, alpha.
37      * @param alpha the new shape parameter.
38      */
39     void setAlpha(double alpha);
40     
41     /**
42      * Access the shape parameter, alpha
43      * @return alpha.
44      */
45     double getAlpha();
46     
47     /**
48      * Modify the scale parameter, beta.
49      * @param beta the new scale parameter.
50      */
51     void setBeta(double beta);
52     
53     /**
54      * Access the scale parameter, beta
55      * @return beta.
56      */
57     double getBeta();
58 }
59
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