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 * Computes the cumulative, inverse cumulative and density functions for the beta distribuiton. 23 * 24 * @see <a href="http://en.wikipedia.org/wiki/Beta_distribution">Beta_distribution</a> 25 * @version $Revision: 920852 $ $Date: 2010-03-09 13:53:44 +0100 (mar. 09 mars 2010) $ 26 * @since 2.0 27 */ 28 public interface BetaDistribution extends ContinuousDistribution, HasDensity<Double> { 29 /** 30 * Modify the shape parameter, alpha. 31 * @param alpha the new shape parameter. 32 * @deprecated as of 2.1 33 */ 34 @Deprecated 35 void setAlpha(double alpha); 36 37 /** 38 * Access the shape parameter, alpha 39 * @return alpha. 40 */ 41 double getAlpha(); 42 43 /** 44 * Modify the shape parameter, beta. 45 * @param beta the new scale parameter. 46 * @deprecated as of 2.1 47 */ 48 @Deprecated 49 void setBeta(double beta); 50 51 /** 52 * Access the shape parameter, beta 53 * @return beta. 54 */ 55 double getBeta(); 56 57 /** 58 * Return the probability density for a particular point. 59 * @param x The point at which the density should be computed. 60 * @return The pdf at point x. 61 * @exception MathException if probability density cannot be computed 62 */ 63 double density(Double x) throws MathException; 64 65 } 66
