Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
Median |
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| 1.0;1 |
1 | /* | |
2 | * Copyright 2010 LinkedIn, Inc | |
3 | * | |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); you may not | |
5 | * use this file except in compliance with the License. You may obtain a copy of | |
6 | * the License at | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | |
12 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the | |
13 | * License for the specific language governing permissions and limitations under | |
14 | * the License. | |
15 | */ | |
16 | ||
17 | package datafu.pig.stats; | |
18 | ||
19 | /** | |
20 | * Computes the {@link <a href="http://en.wikipedia.org/wiki/Median" target="_blank">median</a>} | |
21 | * for a <b>sorted</b> input bag, using type R-2 estimation. This is a convenience wrapper around Quantile. | |
22 | * | |
23 | * <p> | |
24 | * N.B., all the data is pushed to a single reducer per key, so make sure some partitioning is | |
25 | * done (e.g., group by 'day') if the data is too large. That is, this isn't distributed median. | |
26 | * </p> | |
27 | * | |
28 | * @see Quantile | |
29 | */ | |
30 | public class Median extends Quantile | |
31 | { | |
32 | public Median() | |
33 | { | |
34 | 743 | super("0.5"); |
35 | 743 | } |
36 | } |