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https://issues.apache.org/jira/browse/MATH-1008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13712328#comment-13712328
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Gilles commented on MATH-1008:
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There are other opinions about how to structure the packages layout.
Fitting is also a kind of optimization; it doesn't automatically imply that
fitting algorithms cannot be in their own package.
The rationale for the proposed change is to emphasize the difference between a
(single-valued) "cost function" and a (usually multi-valued) "model function".
> Move the contents of "o.a.c.m.nonlinear.vector.jacobian" to the
> "o.a.c.m.fitting" package
> -----------------------------------------------------------------------------------------
>
> Key: MATH-1008
> URL: https://issues.apache.org/jira/browse/MATH-1008
> Project: Commons Math
> Issue Type: Sub-task
> Reporter: Gilles
> Assignee: Gilles
> Priority: Minor
> Labels: api-change
> Fix For: 3.3
>
>
> The non-linear least-squares optimizers should be considered as "fitting"
> algorithms and thus moved to the "o.a.c.m.fitting" package.
> As agreed on the [dev ML|http://markmail.org/message/3fjvucyz7rax4cyi], the
> new classes will use the "fluent API".
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