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From "Gilles (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MATH-784) Javadoc of AbstractLeastSquaresOptimizer.guessParametersErrors() is too vague
Date Thu, 03 May 2012 21:30:48 GMT

    [ https://issues.apache.org/jira/browse/MATH-784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13267818#comment-13267818
] 

Gilles commented on MATH-784:
-----------------------------

Did you confirm that the correct "error" is returned by "guessParametersErrors" but not by
the diagonal elements of the covariance matrix?

                
> Javadoc of AbstractLeastSquaresOptimizer.guessParametersErrors() is too vague
> -----------------------------------------------------------------------------
>
>                 Key: MATH-784
>                 URL: https://issues.apache.org/jira/browse/MATH-784
>             Project: Commons Math
>          Issue Type: Improvement
>    Affects Versions: 3.0
>            Reporter: S├ębastien Brisard
>            Assignee: S├ębastien Brisard
>              Labels: javadoc, optimization
>             Fix For: 3.1
>
>
> This bug report follows a recent discussion available [here|http://mail-archives.apache.org/mod_mbox/commons-dev/201204.mbox/%3C20120418122114.GB32074%40dusk.harfang.homelinux.org%3E].
It is now recognized that the values returned by {{guessParametersErrors()}} are in fact known
as (asymptotic) standard errors. The javadoc should be made more explicit. Besides, the values
returned by this method should be tested. The reference datasets from [NIST|http://www.itl.nist.gov/div898/strd/]
are to be used.

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