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https://issues.apache.org/jira/browse/MATH-1179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14524266#comment-14524266
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Phil Steitz commented on MATH-1179:
-----------------------------------

I would be all for eliminating the Monte Carlo method for the mid-size samples 
if we can get something else that we know is accurate.  I wish I really 
understood what R is doing or could find some references explaining it or 
proposing something better.   Regarding improving approximateP, we should do 
that if we can in any case.

> kolmogorovSmirnovTest poor performance in monteCarloP method
> ------------------------------------------------------------
>
>                 Key: MATH-1179
>                 URL: https://issues.apache.org/jira/browse/MATH-1179
>             Project: Commons Math
>          Issue Type: Bug
>            Reporter: Gilad
>             Fix For: 4.0
>
>         Attachments: KSTest-JavaAndR.txt, KSTestSnippet.txt
>
>
> I'm using the kolmogovSmirnovTest method to calculate pvalues.
> However, when i try running the test on two double[] of sizes 5 and 45 the 
> results take over 10 seconds to calculate.
> This seems very long, whereas in R it takes a few miliseconds for the same 
> calculation.
> I'd be very happy to hear any comment you may have on the subject.
>    Gilad



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