[jira] [Commented] (MADLIB-1211) Condition No. is the same value for all groups in output of linear regression with grouping cols

["Frank McQuillan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MADLIB-1211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16410357#comment-16410357 ] 

Frank McQuillan commented on MADLIB-1211:
-----------------------------------------

Condition number seems to be calculated correctly from what I can see.  If the independent var(s) are identical for each group, then the condition numbers will be the same for each group too.

So marking as not a bug.

> Condition No. is the same value for all groups in output of linear regression with grouping cols
> ------------------------------------------------------------------------------------------------
>
>                 Key: MADLIB-1211
>                 URL: https://issues.apache.org/jira/browse/MADLIB-1211
>             Project: Apache MADlib
>          Issue Type: Bug
>          Components: Module: Linear Regression
>            Reporter: Rashmi Raghu
>            Priority: Minor
>             Fix For: v1.14
>
>
> The model output table for linear regression contains a column for condition number of the matrix. The value in this column is the same for all groups when linear regression is run with grouping columns (an unlikely occurrence in any realistic dataset).



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