[
https://issues.apache.org/jira/browse/MATH-439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12935786#action_12935786
]
Gilles commented on MATH-439:
-----------------------------
Refactoring introduced in revision 1039083.
Please review, as the code changed a lot.
The main change is that the API is uniform (restricted to the "solve" methods).
Thus the functionality of the "LaguerreSolver" class has been reduced (some
code was moved to a private inner class). If the "complex" functionality must
be user-accessible, it should be separate from the "real" solvers; creating a
{{analysis.solvers.complex}} sub-package might be appropriate...
The problem with {{NonLinearConjugateGradientOptimizer}} is not solved yet, but
a workaround (that almost behaves as the previous code) lets the unit test pass.
> Refactoring of solvers (package "analysis.solvers")
> ---------------------------------------------------
>
> Key: MATH-439
> URL: https://issues.apache.org/jira/browse/MATH-439
> Project: Commons Math
> Issue Type: Improvement
> Reporter: Gilles
> Priority: Minor
> Fix For: 3.0
>
> Attachments: AbstractUnivariateRealSolver.java,
> NLCG.testCircleFitting.txt
>
>
> The classes in package "analysis.solvers" could be refactored similarly to
> what was done for package {{optimization}}.
> * Replace {{MaxIterationsExceededException}} with
> {{TooManyEvaluationsException}}:
> Apart from the class {{MaxIterationsExceededException}} being deprecated,
> this approach makes it difficult to compare different algorithms: While the
> concept of iteration is algorithm-dependent, the user is probably mostly
> interested in the number of function evaluations.
> * Implement the method {{solve}} in the base class
> ({{UnivariateRealSolverImpl}}) and define an abstract method {{doSolve}} to
> be implemented in derived classes. This method would then use a new
> {{computeObjectiveFunction}} method that will take care of the counting of
> the function evaluations.
> * Remove "protected" fields (the root is unnecessary since it is returned by
> {{solve}}). Arguingly the function value is also not very useful (as we know
> what it should be), except for debugging purposes (in which case, it might
> not be a problem to call the function's {{value}} method once more).
> * Remove the tolerance setter (accuracy) and make the corresponding fields
> "final".
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
