Re: [R] nonlinear curve fitting on a torus

From: Spencer Graves <spencer.graves_at_pdf.com>
Date: Sun, 13 Apr 2008 13:54:17 -0700

      Having seen no reply to this, I will offer a couple of comments that may or may not be useful. Googling for "geodesic equation on a torus" produced interesting hits, but RSiteSearch("geodesic equation on a torus") found nothing. RSiteSearch("torus") returned 33 hits, some of which referred to a package "geozoo".

      If you want a solution of a differential equation, you might consider lsoda {odesolve}. The 'fda' package may also be useful.

      To say more, I'd prefer to hear more specifics from you. PLEASE do read the posting guide "http://www.R-project.org/posting-guide.html" and provide commented, minimal, self-contained, reproducible code. Doing so can make it much easier for people to understand what you want. If you provide code that doesn't quite work, someone who is interested can copy it from your email into R and try things, possibly generating a solution to your problem. Without a self-contained example, you restrict the pool of possible respondents to people who have actually worked with a "geodesic equation on a torus" -- or to fools like me who are willing to expose their ignorance commenting on something we know essentially nothing about.

      Hope this helps. 
      Spencer Graves

Sungsu wrote:
> Dear R users.
>
> I have data observed on the surface of a torus, and
> am trying to fit the nonlinear regression using
>
> the geodesic equation on a torus. Could anyone give
> me a helpful advise on this problem? I would
> definitely appreicate your reply.
>
> Sincerely,
>
> SUNGSU KIM
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help_at_r-project.org mailing list
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>



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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Sun 13 Apr 2008 - 21:01:28 GMT

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