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Date: Wed, 21 Apr 2010 13:27:50 -0400 (EDT)
From: "Luc Maisonobe (JIRA)" <jira@apache.org>
To: issues@commons.apache.org
Subject: [jira] Commented: (MATH-366) TricubicSplineInterpolator
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    [ https://issues.apache.org/jira/browse/MATH-366?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12859441#action_12859441 ] 

Luc Maisonobe commented on MATH-366:
------------------------------------

I understand the rationale behind adding Bivariate versions of some interfaces instead of using the general Multivariate form.
I fear adding Trivariate versions is a path to QuadriVariate and so on ... So I'm a little uncomfortable with these, and would need further rationale to get convinced. Could you elaborate a little more about the need ?

> TricubicSplineInterpolator
> --------------------------
>
>                 Key: MATH-366
>                 URL: https://issues.apache.org/jira/browse/MATH-366
>             Project: Commons Math
>          Issue Type: New Feature
>            Reporter: Gilles
>            Priority: Minor
>
> Similarly to the "BicubicSplineInterpolator", I propose to add a "TricubicSplineInterpolator" class.
> This will also require the following:
> # Add methods in "BicubicSplineInterpolatingFunction" (to compute the partial derivatives)
> # Add a "TrivariateRealGridInterpolator" interface
> # Add a "TrivariateRealFunction" interface
> # Add a "TricubicSplineInterpolatingFunction" class (to compute the spline coefficients from the sampled function, and its partial derivatives)
> Is it OK to perform the changes?

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