commons-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Gilles (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (MATH-1178) Incorrect sample of usage of StatUtils at homepage
Date Mon, 08 Dec 2014 23:17:12 GMT

     [ https://issues.apache.org/jira/browse/MATH-1178?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gilles resolved MATH-1178.
--------------------------
       Resolution: Fixed
    Fix Version/s: 3.4

Thanks for the report.
Fixed in commit 5d6e445484d75dad938cece6fd690427ea648203

> Incorrect sample of usage of StatUtils at homepage
> --------------------------------------------------
>
>                 Key: MATH-1178
>                 URL: https://issues.apache.org/jira/browse/MATH-1178
>             Project: Commons Math
>          Issue Type: Bug
>         Environment: Documentation at http://commons.apache.org/proper/commons-math/userguide/stat.html
>            Reporter: Dmitriy
>            Priority: Trivial
>             Fix For: 3.4
>
>   Original Estimate: 10m
>  Remaining Estimate: 10m
>
> At http://commons.apache.org/proper/commons-math/userguide/stat.html you are providing
three ways to compute mean, std, median with DescriptiveStatistics, SummaryStatistics, StatUtils.
> But when you execute double std = StatUtils.variance(values), you are not actually get
std in std, you get std*std, because DescriptiveStatistics actually returns FastMath.sqrt(getVariance()),
but StatUtils returns variance directly.
> The solution is to substitute "double std = StatUtils.variance(values);" with "double
std = FastMath.sqrt(StatUtils.variance(values));"



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

Mime
View raw message