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https://issues.apache.org/jira/browse/MATH-1008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13710024#comment-13710024
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Gilles commented on MATH-1008:
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bq. [...] classes will be duplicated [...]
Yes. With some changes, hopefully for the better. :)
In 3.3, there will be three versions of the same functionality:
* o.a.c.m.optimization.general (deprecated in 3.1)
* o.a.c.m.optim.nonlinear.vector.jacobian (to be deprecated)
* o.a.c.m.fitting.leastsquares (to be created)
A slew of classes (a.o. those that "implement" the {{OptimizationData}} marker
interface) defined in {{o.a.c.m.optim.nonlinear.vector}} and currently only
used in {{o.a.c.m.optim.nonlinear.vector.jacobian}} should also be deprecated
in 3.3.
Classes within CM that use the deprecated versions should also be upgraded
before the 3.3 release.
> 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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