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 import org.apache.commons.math.MathException;
20 
21 /**
22  * <p>Base interface for continuous distributions.</p>
23  *
24  * <p>Note: this interface will be extended in version 3.0 to include
25  * <br/><code>public double density(double x)</code><br/>
26  * that is, from version 3.0 forward, continuous distributions <strong>must</strong>
27  * include implementations of probability density functions. As of version
28  * 2.1, all continuous distribution implementations included in commons-math
29  * provide implementations of this method.</p>
30  *
31  * @version $Revision: 924362 $ $Date: 2010-03-17 17:45:31 +0100 (mer. 17 mars 2010) $
32  */
33 public interface ContinuousDistribution extends Distribution {
34 
35     /**
36      * For this distribution, X, this method returns x such that P(X &lt; x) = p.
37      * @param p the cumulative probability.
38      * @return x.
39      * @throws MathException if the inverse cumulative probability can not be
40      *            computed due to convergence or other numerical errors.
41      */
inverseCumulativeProbability(double p)42     double inverseCumulativeProbability(double p) throws MathException;
43 }
44