Raymond | dee0849 | 2015-04-02 10:43:13 -0700 | [diff] [blame] | 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 | |
| 20 | /** |
| 21 | * Base interface for discrete distributions. |
| 22 | * |
| 23 | * @version $Revision: 811685 $ $Date: 2009-09-05 19:36:48 +0200 (sam. 05 sept. 2009) $ |
| 24 | */ |
| 25 | public interface DiscreteDistribution extends Distribution { |
| 26 | /** |
| 27 | * For a random variable X whose values are distributed according |
| 28 | * to this distribution, this method returns P(X = x). In other words, this |
| 29 | * method represents the probability mass function, or PMF for the distribution. |
| 30 | * |
| 31 | * @param x the value at which the probability mass function is evaluated. |
| 32 | * @return the value of the probability mass function at x |
| 33 | */ |
| 34 | double probability(double x); |
| 35 | } |