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Posted to issues@commons.apache.org by "Chee Sing Lee (JIRA)" <ji...@apache.org> on 2019/04/09 18:44:00 UTC
[jira] [Updated] (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 ]
Chee Sing Lee updated MATH-1477:
--------------------------------
Description:
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.
was:
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 algorithm used to reorder the predictors when a subset is used, but the fix appears to be a simple correction to the indexing range in the for-loop at line 1059 of MillerUpdatingRegression.java.
Patch with expanded unit test to follow shortly.
> 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
> Time Spent: 10m
> 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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