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Date: Wed, 14 Sep 2011 11:23:09 +0000 (UTC)
From: =?utf-8?Q?S=C3=A9bastien_Brisard_=28JIRA=29?= <jira@apache.org>
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Subject: [jira] [Commented] (MATH-655) General framework for iterative
 algorithms
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    [ https://issues.apache.org/jira/browse/MATH-655?page=3Dcom.atlassian.j=
ira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D131044=
21#comment-13104421 ]=20

S=C3=A9bastien Brisard commented on MATH-655:
----------------------------------------

Yes, I forgot to mention that I'm about to submit the Conjugate Gradient co=
de, which is fully tested, and uses this framework. I just need to polish s=
ome last details up...

> General framework for iterative algorithms
> ------------------------------------------
>
>                 Key: MATH-655
>                 URL: https://issues.apache.org/jira/browse/MATH-655
>             Project: Commons Math
>          Issue Type: New Feature
>    Affects Versions: 3.0
>            Reporter: S=C3=A9bastien Brisard
>            Priority: Minor
>              Labels: algorithm, events
>         Attachments: iteration-manager.zip, iterative-algorithm.zip, iter=
ative-algorithm.zip
>
>
> Following the thread [Monitoring iterative algorithms|http://mail-archive=
s.apache.org/mod_mbox/commons-dev/201108.mbox/%3CCAGRH7HrgcgoBA=3DjcoKovjiQ=
U=3DTjpQHnspBkOGNCu7oDdKk=3DK4w@mail.gmail.com%3E], here is a first attempt=
 at defining a general enough framework for iterative algorithms at large. =
At the moment, the classes provide support for
> * maximum number of iterations
> * events handling
> ** initialization event (prior to entering the main loop),
> ** iteration event (after completion of one iteration),
> ** termination event (after termination of the main loop).
> These classes do not yet provide support for a stopping criterion.
> Some points worth to note
> * For the time being, the classes are part of the o.a.c.m.linear package.
> * For the time being, {{IterativeAlgorithm.incrementIterationCount()}} th=
rows a {{TooManyEvaluationsException}}. If the proposed new feature is inte=
grated into CM, then a proper {{TooManyIterationsException}} should be crea=
ted, from which the former could derive.

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