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Date: Wed, 15 Aug 2012 10:03:37 +1100 (NCT)
From: "Gilles (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (MATH-844) "HarmonicFitter.ParameterGuesser"
 sometimes fails to return sensible values
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    [ https://issues.apache.org/jira/browse/MATH-844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13434614#comment-13434614 ] 

Gilles commented on MATH-844:
-----------------------------

I propose to check whether the values are sensible, and when they are not, either
# throw an appropriate exception (i.e. signal that the guesser fails), or
# return arbitrary values that would allow the optimizer to proceed.

Any preference?

                
> "HarmonicFitter.ParameterGuesser" sometimes fails to return sensible values
> ---------------------------------------------------------------------------
>
>                 Key: MATH-844
>                 URL: https://issues.apache.org/jira/browse/MATH-844
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 3.0
>            Reporter: Gilles
>            Priority: Minor
>             Fix For: 3.1
>
>         Attachments: MATH-844.test.patch
>
>
> The inner class "ParameterGuesser" in "HarmonicFitter" (package "o.a.c.m.optimization.fitting") fails to compute a usable guess for the "amplitude" parameter.

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