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Posted to issues@commons.apache.org by "greg sterijevski (JIRA)" <ji...@apache.org> on 2011/07/14 07:33:59 UTC

[jira] [Updated] (MATH-619) ADJUSTED R SQUARED INCORRECT IN REGRESSION RESULTS

     [ https://issues.apache.org/jira/browse/MATH-619?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

greg sterijevski updated MATH-619:
----------------------------------

    Attachment: regres

> ADJUSTED R SQUARED INCORRECT IN REGRESSION RESULTS
> --------------------------------------------------
>
>                 Key: MATH-619
>                 URL: https://issues.apache.org/jira/browse/MATH-619
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 3.0
>         Environment: Java
>            Reporter: greg sterijevski
>         Attachments: regres
>
>
> I forgot to cast to double when dividing two integers:
>             this.globalFitInfo[ADJRSQ_IDX] = 1.0 - 
>                     (1.0 - this.globalFitInfo[RSQ_IDX]) *
>                     (  nobs / ( (nobs - rank)));
> Should be
>             this.globalFitInfo[ADJRSQ_IDX] = 1.0 - 
>                     (1.0 - this.globalFitInfo[RSQ_IDX]) *
>                     ( (double) nobs / ( (double) (nobs - rank)));
> Patch attached.

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