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 }