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 18 package org.apache.commons.math.distribution; 19 20 import org.apache.commons.math.MathException; 21 22 /** 23 * Interface that signals that a distribution can compute the probability density function 24 * for a particular point. 25 * @param <P> the type of the point at which density is to be computed, this 26 * may be for example <code>Double</code> 27 * @version $Revision: 705239 $ $Date: 2008-10-16 09:32:32 -0400 (Thu, 16 Oct 2008) $ 28 */ 29 public interface HasDensity<P> { 30 31 /** 32 * Compute the probability density function. 33 * @param x point for which the probability density is requested 34 * @return probability density at point x 35 * @throws MathException if probability density cannot be computed at specifed point 36 */ 37 double density(P x) throws MathException; 38 39 }