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Posted to issues@commons.apache.org by "Gilles (JIRA)" <ji...@apache.org> on 2019/04/10 01:19:00 UTC

[jira] [Resolved] (MATH-1477) MillerUpdatingRegression: ArrayIndexOutOfBounds when calling regress with variablesToInclude parameter

     [ https://issues.apache.org/jira/browse/MATH-1477?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gilles resolved MATH-1477.
--------------------------
       Resolution: Fixed
    Fix Version/s: 4.0

PR merged (commit 8694f8478bed676c9bb13a3a9a6e2eca56029c95 in "master").
Thanks.

> MillerUpdatingRegression: ArrayIndexOutOfBounds when calling regress with variablesToInclude parameter
> ------------------------------------------------------------------------------------------------------
>
>                 Key: MATH-1477
>                 URL: https://issues.apache.org/jira/browse/MATH-1477
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 3.6.1
>            Reporter: Chee Sing Lee
>            Priority: Major
>              Labels: easyfix, newbie, patch
>             Fix For: 4.0
>
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> When performing a regression with a subset of predictors, an ArrayIndexOutOfBounds exception will occur for certain subset selections. For example, this appears to happen consistently for regressions without a constant term when the predictor at index 0 is not selected.
> I do not understand at all the algorithm used to reorder the predictors when a subset is requested, but the fix appears to be a simple correction to the indexing range in the for-loop in the regress method of MillerUpdatingRegression.java.
>  
> Patch with expanded unit test to follow shortly.



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