    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
    018    package org.apache.commons.math.distribution;
    019
    020    /**
    021     * Normal (Gauss) Distribution.
    022     *
    023     * <p>
    024     * References:</p><p>
    025     * <ul>
    026     * <li><a href="http://mathworld.wolfram.com/NormalDistribution.html">
    027     * Normal Distribution</a></li>
    028     * </ul>
    029     * </p>
    030     *
    031     * @version $Revision: 920852 $ $Date: 2010-03-09 13:53:44 +0100 (mar. 09 mars 2010) $
    032     */
    033    public interface NormalDistribution extends ContinuousDistribution, HasDensity<Double> {
    034        /**
    035         * Access the mean.
    036         * @return mean for this distribution
    037         */
    038        double getMean();
    039        /**
    040         * Modify the mean.
    041         * @param mean for this distribution
    042         * @deprecated as of v2.1
    043         */
    044        @Deprecated
    045        void setMean(double mean);
    046        /**
    047         * Access the standard deviation.
    048         * @return standard deviation for this distribution
    049         */
    050        double getStandardDeviation();
    051        /**
    052         * Modify the standard deviation.
    053         * @param sd standard deviation for this distribution
    054         * @deprecated as of v2.1
    055         */
    056        @Deprecated
    057        void setStandardDeviation(double sd);
    058
    059        /**
    060         * Return the probability density for a particular point.
    061         * @param x  The point at which the density should be computed.
    062         * @return  The pdf at point x.
    063         */
    064        double density(Double x);
    065    }