001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.commons.math.distribution; 018 019 import org.apache.commons.math.MathException; 020 021 /** 022 * <p>Base interface for continuous distributions.</p> 023 * 024 * <p>Note: this interface will be extended in version 3.0 to include 025 * <br/><code>public double density(double x)</code><br/> 026 * that is, from version 3.0 forward, continuous distributions <strong>must</strong> 027 * include implementations of probability density functions. As of version 028 * 2.1, all continuous distribution implementations included in commons-math 029 * provide implementations of this method.</p> 030 * 031 * @version $Revision: 924362 $ $Date: 2010-03-17 12:45:31 -0400 (Wed, 17 Mar 2010) $ 032 */ 033 public interface ContinuousDistribution extends Distribution { 034 035 /** 036 * For this distribution, X, this method returns x such that P(X < x) = p. 037 * @param p the cumulative probability. 038 * @return x. 039 * @throws MathException if the inverse cumulative probability can not be 040 * computed due to convergence or other numerical errors. 041 */ 042 double inverseCumulativeProbability(double p) throws MathException; 043 }