1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/*
* 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.math3.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
*/
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
}
|
