1 /* 2 * Copyright 2003-2004 The Apache Software Foundation. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package org.apache.commons.math.distribution; 17 18 /** 19 * F-Distribution. 20 * 21 * Instances of FDistribution objects should be created using 22 * {@link DistributionFactory#createFDistribution(double,double)}. 23 * 24 * <p> 25 * References: 26 * <ul> 27 * <li><a href="http://mathworld.wolfram.com/F-Distribution.html"> 28 * F-Distribution</a></li> 29 * </ul> 30 * </p> 31 * 32 * @version $Revision: 155427 $ $Date: 2005-02-26 06:11:52 -0700 (Sat, 26 Feb 2005) $ 33 */ 34 public interface FDistribution extends ContinuousDistribution { 35 /** 36 * Modify the numerator degrees of freedom. 37 * @param degreesOfFreedom the new numerator degrees of freedom. 38 */ 39 void setNumeratorDegreesOfFreedom(double degreesOfFreedom); 40 41 /** 42 * Access the numerator degrees of freedom. 43 * @return the numerator degrees of freedom. 44 */ 45 double getNumeratorDegreesOfFreedom(); 46 47 /** 48 * Modify the denominator degrees of freedom. 49 * @param degreesOfFreedom the new denominator degrees of freedom. 50 */ 51 void setDenominatorDegreesOfFreedom(double degreesOfFreedom); 52 53 /** 54 * Access the denominator degrees of freedom. 55 * @return the denominator degrees of freedom. 56 */ 57 double getDenominatorDegreesOfFreedom(); 58 }