    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     * Computes the cumulative, inverse cumulative and density functions for the beta distribuiton.
    023     *
    024     * @see <a href="http://en.wikipedia.org/wiki/Beta_distribution">Beta_distribution</a>
    025     * @version $Revision: 920852 $ $Date: 2010-03-09 13:53:44 +0100 (mar. 09 mars 2010) $
    026     * @since 2.0
    027     */
    028    public interface BetaDistribution extends ContinuousDistribution, HasDensity<Double> {
    029        /**
    030         * Modify the shape parameter, alpha.
    031         * @param alpha the new shape parameter.
    032         * @deprecated as of 2.1
    033         */
    034        @Deprecated
    035        void setAlpha(double alpha);
    036
    037         /**
    038          * Access the shape parameter, alpha
    039          * @return alpha.
    040          */
    041         double getAlpha();
    042
    043         /**
    044          * Modify the shape parameter, beta.
    045          * @param beta the new scale parameter.
    046          * @deprecated as of 2.1
    047          */
    048         @Deprecated
    049         void setBeta(double beta);
    050
    051         /**
    052          * Access the shape parameter, beta
    053          * @return beta.
    054          */
    055         double getBeta();
    056
    057         /**
    058          * Return the probability density for a particular point.
    059          * @param x  The point at which the density should be computed.
    060          * @return  The pdf at point x.
    061          * @exception MathException if probability density cannot be computed
    062          */
    063         double density(Double x) throws MathException;
    064
    065    }