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https://issues.apache.org/jira/browse/MATH-726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13170977#comment-13170977
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Gilles commented on MATH-726:
-----------------------------
The proposed code was modelled against the structure of solvers and optimizers
classes (method "derivative" is the counterpart of "solve" and "optimize",
respectively).
What you propose seems to depart from this, but I cannot really judge because I
don't know anything about "nabla".
It may be the right way in the longer term... However, given the resources
devoted to "nabla", I don't think that it is wise to force Commons Math to fit
the current design of "nabla". I see well that "nabla" and CM could converge at
the time of CM version 4.0. :)
But for v3.x it could be fine to provide the low-level bits (?).
But it can also be that I completely missed your point. If so, could you please
post the code that would help me figure out what you propose?
> Ridders derivative
> ------------------
>
> Key: MATH-726
> URL: https://issues.apache.org/jira/browse/MATH-726
> Project: Commons Math
> Issue Type: New Feature
> Reporter: Gilles
> Assignee: Gilles
> Priority: Minor
> Labels: features
> Fix For: 3.0
>
> Attachments: RiddersFirstDerivative.java
>
>
> Implementation of the numerical first derivative, as described in:
> {noformat}
> Accurate computation of F'(x) and F'(x) F''(x)
> C. J. F. Ridders
> Adv. Eng. Software, 1982, Vol 4, No. 2
> {noformat}
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