001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018 package org.apache.commons.math.distribution;
019
020 /**
021 * Weibull Distribution. This interface defines the two parameter form of the
022 * distribution as defined by
023 * <a href="http://mathworld.wolfram.com/WeibullDistribution.html">
024 * Weibull Distribution</a>, equations (1) and (2).
025 *
026 * <p>
027 * References:
028 * <ul>
029 * <li><a href="http://mathworld.wolfram.com/WeibullDistribution.html">
030 * Weibull Distribution</a></li>
031 * </ul>
032 * </p>
033 *
034 * @since 1.1
035 * @version $Revision: 920852 $ $Date: 2010-03-09 13:53:44 +0100 (mar. 09 mars 2010) $
036 */
037 public interface WeibullDistribution extends ContinuousDistribution {
038
039 /**
040 * Access the shape parameter.
041 * @return the shape parameter.
042 */
043 double getShape();
044
045 /**
046 * Access the scale parameter.
047 * @return the scale parameter.
048 */
049 double getScale();
050
051 /**
052 * Modify the shape parameter.
053 * @param alpha The new shape parameter value.
054 * @deprecated as of v2.1
055 */
056 @Deprecated
057 void setShape(double alpha);
058
059 /**
060 * Modify the scale parameter.
061 * @param beta The new scale parameter value.
062 * @deprecated as of v2.1
063 */
064 @Deprecated
065 void setScale(double beta);
066 }