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Posted to issues@commons.apache.org by "Luc Maisonobe (JIRA)" <ji...@apache.org> on 2011/03/23 21:19:06 UTC

[jira] [Closed] (MATH-406) Wrong weight handling in Levenberg-Marquardt

     [ https://issues.apache.org/jira/browse/MATH-406?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Luc Maisonobe closed MATH-406.
------------------------------


Closing issue as it was included in version 2.2, which has been released

> Wrong weight handling in Levenberg-Marquardt
> --------------------------------------------
>
>                 Key: MATH-406
>                 URL: https://issues.apache.org/jira/browse/MATH-406
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 2.1
>            Reporter: Dimitri Pourbaix
>            Assignee: Dimitri Pourbaix
>             Fix For: Nightly Builds
>
>         Attachments: MATH-406.patch
>
>
> A comparison with a Fortran version of Levenberg-Marquardt reveals that when observations have different weights, the 2.1 version reaches a value of the function which does not necessary correspond to the minimum

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