commons-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Venkatesha Murthy TS (JIRA)" <>
Subject [jira] [Commented] (MATH-1120) Need Percentile computations that can be matched with standard spreadsheet formula
Date Mon, 23 Jun 2014 09:42:25 GMT


Venkatesha Murthy TS commented on MATH-1120:

Any concerns do we see if the bUilder approach is modifed as 

B'cos i see that with the with<> approach suggested; we will keep creating additional
instances of percentle. So if instead we went with a build method only one Builder Helper
instance will be used untill we call build() method. I can send that patch if that thought
is acceptable. Please let know
ofcourse all builder attribute setters are fluent in nature and are optional. So for eg:

Also with Math-1130 changes coming in for remove and replace; i can add the refactored replace
and remove methods as well. Please let know if i can modify with these changes and send the
patch again.

> Need Percentile computations that can be matched with standard spreadsheet formula
> ----------------------------------------------------------------------------------
>                 Key: MATH-1120
>                 URL:
>             Project: Commons Math
>          Issue Type: Improvement
>    Affects Versions: 3.2
>            Reporter: Venkatesha Murthy TS
>              Labels: Percentile
>             Fix For: 4.0
>         Attachments: 18-jun-percentile-with-estimation-patch, excel-percentile-patch,
percentile-with-estimation-patch, r-output.txt
>   Original Estimate: 504h
>  Remaining Estimate: 504h
> The current Percentile implementation assumes and hard-codes the quantile pth position
> 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.

This message was sent by Atlassian JIRA

View raw message