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https://issues.apache.org/jira/browse/MATH-1120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14015363#comment-14015363
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Venkatesha Murthy TS edited comment on MATH-1120 at 6/2/14 2:07 PM:
--------------------------------------------------------------------
Cleared check style, pmd, findbugs and improved code coverage for the changed
portions.
You could also refer to the complete sources at:
https://github.com/venkateshamurthy/java-quantiles/blob/master/src/main/java/org/apache/commons/math3/stat/descriptive/rank/Percentile.java
https://github.com/venkateshamurthy/java-quantiles/blob/master/src/test/java/org/apache/commons/math3/stat/descriptive/rank/PercentileTest.java
was (Author: vmurthy):
Cleared check style, pmd, findbugs and improved code coverage for the changed
portions.
> Need Percentile computations that can be matched with standard spreadsheet
> formula
> ----------------------------------------------------------------------------------
>
> Key: MATH-1120
> URL: https://issues.apache.org/jira/browse/MATH-1120
> Project: Commons Math
> Issue Type: Improvement
> Affects Versions: 3.2
> Reporter: Venkatesha Murthy TS
> Labels: Percentile
> Fix For: 4.0
>
> Attachments: excel-percentile-patch, percentile-with-estimation-patch
>
> Original Estimate: 504h
> Remaining Estimate: 504h
>
> The current Percentile implementation assumes and hard-codes the quantile pth
> position as
> p * (N+1)/100 and provides a kth selected value.
> However if we need to verify compare/contrast with standard statistical tools
> such as say MS Excel; it would be good to provide an extensible way of
> morphing this selection of position than hard code.
> For example in order to generate the percentile closely matching with MS
> Excel the position required may be [p*(N-1)/100]+1.
> Please let me know if i could submit this as a patch.
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