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
18package org.apache.commons.math.distribution;
19
20/**
21 * Normal (Gauss) Distribution.
22 *
23 * <p>
24 * References:</p><p>
25 * <ul>
26 * <li><a href="http://mathworld.wolfram.com/NormalDistribution.html">
27 * Normal Distribution</a></li>
28 * </ul>
29 * </p>
30 *
31 * @version $Revision: 920852 $ $Date: 2010-03-09 13:53:44 +0100 (mar. 09 mars 2010) $
32 */
33public interface NormalDistribution extends ContinuousDistribution, HasDensity<Double> {
34    /**
35     * Access the mean.
36     * @return mean for this distribution
37     */
38    double getMean();
39    /**
40     * Modify the mean.
41     * @param mean for this distribution
42     * @deprecated as of v2.1
43     */
44    @Deprecated
45    void setMean(double mean);
46    /**
47     * Access the standard deviation.
48     * @return standard deviation for this distribution
49     */
50    double getStandardDeviation();
51    /**
52     * Modify the standard deviation.
53     * @param sd standard deviation for this distribution
54     * @deprecated as of v2.1
55     */
56    @Deprecated
57    void setStandardDeviation(double sd);
58
59    /**
60     * Return the probability density for a particular point.
61     * @param x  The point at which the density should be computed.
62     * @return  The pdf at point x.
63     */
64    double density(Double x);
65}
66