| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.commons.math.stat.ranking; |
| |
| /** |
| * Strategies for handling tied values in rank transformations. |
| * <ul> |
| * <li>SEQUENTIAL - Ties are assigned ranks in order of occurrence in the original array, |
| * for example (1,3,4,3) is ranked as (1,2,4,3)</li> |
| * <li>MINIMUM - Tied values are assigned the minimum applicable rank, or the rank |
| * of the first occurrence. For example, (1,3,4,3) is ranked as (1,2,4,2)</li> |
| * <li>MAXIMUM - Tied values are assigned the maximum applicable rank, or the rank |
| * of the last occurrence. For example, (1,3,4,3) is ranked as (1,3,4,3)</li> |
| * <li>AVERAGE - Tied values are assigned the average of the applicable ranks. |
| * For example, (1,3,4,3) is ranked as (1,2.5,4,2.5)</li> |
| * <li>RANDOM - Tied values are assigned a random integer rank from among the |
| * applicable values. The assigned rank will always be an integer, (inclusively) |
| * between the values returned by the MINIMUM and MAXIMUM strategies.</li> |
| * </ul> |
| * |
| * @since 2.0 |
| * @version $Revision: 981332 $ $Date: 2010-08-02 00:24:31 +0200 (lun. 02 août 2010) $ |
| */ |
| public enum TiesStrategy { |
| |
| /** Ties assigned sequential ranks in order of occurrence */ |
| SEQUENTIAL, |
| |
| /** Ties get the minimum applicable rank */ |
| MINIMUM, |
| |
| /** Ties get the maximum applicable rank */ |
| MAXIMUM, |
| |
| /** Ties get the average of applicable ranks */ |
| AVERAGE, |
| |
| /** Ties get a random integral value from among applicable ranks */ |
| RANDOM |
| } |