1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.math.distribution;
18
19 /**
20 * Student's t-Distribution.
21 *
22 * <p>
23 * References:
24 * <ul>
25 * <li><a href="http://mathworld.wolfram.com/Studentst-Distribution.html">
26 * Student's t-Distribution</a></li>
27 * </ul>
28 * </p>
29 *
30 * @version $Revision: 545192 $ $Date: 2007-06-07 07:35:04 -0700 (Thu, 07 Jun 2007) $
31 */
32 public interface TDistribution extends ContinuousDistribution {
33 /**
34 * Modify the degrees of freedom.
35 * @param degreesOfFreedom the new degrees of freedom.
36 */
37 void setDegreesOfFreedom(double degreesOfFreedom);
38
39 /**
40 * Access the degrees of freedom.
41 * @return the degrees of freedom.
42 */
43 double getDegreesOfFreedom();
44 }