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https://issues.apache.org/jira/browse/MATH-887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13494022#comment-13494022
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Gilles commented on MATH-887:
-----------------------------
"LevenbergMarquardtOptimizer" updated to not use the deprecated fields and
methods revision 1407467.
> "AbstractLeastSquares" cleanup
> -------------------------------
>
> Key: MATH-887
> URL: https://issues.apache.org/jira/browse/MATH-887
> Project: Commons Math
> Issue Type: Task
> Affects Versions: 3.0
> Reporter: Gilles
> Assignee: Gilles
> Priority: Minor
> Labels: api-change
> Fix For: 3.1, 4.0
>
> Attachments: MATH-887.diff
>
>
> Class "AbstractLeastSquares" (in package "o.a.c.m.optimization.general") has
> a lot of "protected" fields that are modified by its subclasses (e.g.
> "LevenbergMarquardt"). This decreases encapsulation which in turn makes the
> code more difficult to understand and modify.
> I propose to deprecate (in 3.1) and remove or make "private" (in 4.0) all
> fields that could be hidden or should be modified through setter methods.
> Part of the code could also be more readable (and self-documenting) by making
> use of higher-level constructs such as "RealMatrix" rather than using
> explicit loops.
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