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From "Gilles (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MATH-995) Adaptive division of segments in Quadrature Legendre-Gauss
Date Thu, 04 Jul 2013 14:31:48 GMT

    [ https://issues.apache.org/jira/browse/MATH-995?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13700090#comment-13700090
] 

Gilles commented on MATH-995:
-----------------------------

The ML contains a [lengthy discussion|http://markmail.org/message/vshi3gka7a7tdvbb] about
this issue, that is drifting away from the original report about a bug in CM.

A warning has been added (revision 1499765) in the class's Javadoc to avoid the kind of usage
that hits the limitation of this algorithm.

Adaptive strategies are nice features to have in CM; but such a request belongs to another
report, and how to best implement them in CM should be discussed in a specific thread on the
"dev" ML.


                
> Adaptive division of segments in Quadrature  Legendre-Gauss
> -----------------------------------------------------------
>
>                 Key: MATH-995
>                 URL: https://issues.apache.org/jira/browse/MATH-995
>             Project: Commons Math
>          Issue Type: Bug
>            Reporter: Ajo Fod
>         Attachments: gaussian__sigma_1000.png, gaussian__sigma_1000_zoom.png, gaussian__sigma_1.png,
patch-code, patch-code, patch-code, patch-test
>
>
> I think the existing Legendre-Gauss object fails for certain integrals. An example of
failure and a solution that divides segments based on error is provided. Please let me know
if I'm not using the Legendre-Gauss object correctly.

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