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From "Thomas Neidhart (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MATH-1131) Kolmogorov-Smirnov Tests takes 'forever' on 10,000 item dataset
Date Fri, 04 Jul 2014 21:05:34 GMT

    [ https://issues.apache.org/jira/browse/MATH-1131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14052662#comment-14052662
] 

Thomas Neidhart commented on MATH-1131:
---------------------------------------

Ok great and thanks for the info, as I did only look at the c source code in the R project.

I am happy to review your code and have no objections.

> Kolmogorov-Smirnov Tests takes 'forever' on 10,000 item dataset
> ---------------------------------------------------------------
>
>                 Key: MATH-1131
>                 URL: https://issues.apache.org/jira/browse/MATH-1131
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 3.3
>         Environment: Java 8
>            Reporter: Schalk W. Cronjé
>         Attachments: 1.txt, MATH-1131.patch, ReproduceKsIssue.groovy, ReproduceKsIssue.java
>
>
> I have code simplified to the following:
>     KolmogorovSmirnovTest kst = new KolmogorovSmirnovTest();
>     NormalDistribution nd = new NormalDistribution(mean,stddev);
>     kst.kolmogorovSmirnovTest(nd,dataset)
> I find that for my dataset of 10,000 items, the call to kolmogorovSmirnovTest takes 'forever'.
It has not returned after nearly 15minutes and in one my my tests has gone over 150MB in 
memory usage. 



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