commons-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Otmar Ertl (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MATH-1274) Represent Kolmogorov-Smirnov statistic as long value
Date Tue, 15 Sep 2015 19:25:46 GMT

     [ https://issues.apache.org/jira/browse/MATH-1274?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Otmar Ertl updated MATH-1274:
-----------------------------
    Attachment: MATH-1274.patch

> Represent Kolmogorov-Smirnov statistic as long value
> ----------------------------------------------------
>
>                 Key: MATH-1274
>                 URL: https://issues.apache.org/jira/browse/MATH-1274
>             Project: Commons Math
>          Issue Type: Improvement
>            Reporter: Otmar Ertl
>         Attachments: MATH-1274.patch
>
>
> In KolmogorovSmirnovTest.java the 2-sample Kolmogorov-Smirnov statistic is internally
represented as double value. However, the KS-statistic can be accurately represented as long
value if multiplied by both sample sizes. This approach saves some floating point operations
and avoids difficulties when comparing two KS-statistics. Currently, Precision.compareTo with
some tolerance must be used.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message