OnlineSummarizer does not tolerate fewer than 100 samples
---------------------------------------------------------
Key: MAHOUT-692
URL: https://issues.apache.org/jira/browse/MAHOUT-692
Project: Mahout
Issue Type: Bug
Affects Versions: 0.4
Reporter: Paul Baclace
Priority: Minor
If fewer than 100 samples are add()ed to an instance of
org.apache.mahout.math.stats.OnlineSummarizer an exception will be thrown
during a sort when getQuartile() is called:
Caused by: java.lang.IndexOutOfBoundsException: from: 0, to: 99, size=89
at
org.apache.mahout.math.list.AbstractList.checkRangeFromTo(AbstractList.java:87)
at
org.apache.mahout.math.list.DoubleArrayList.sortFromTo(DoubleArrayList.java:573)
at
org.apache.mahout.math.stats.OnlineSummarizer.sort(OnlineSummarizer.java:116)
at
org.apache.mahout.math.stats.OnlineSummarizer.getQuartile(OnlineSummarizer.java:129)
The problem is that sort is on index range 0,99 but 0,n-1 should be used.
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