Message-ID: <alpine.LRH.2.00.0909231354340.18327@reclus.nhh.no>
Date: 2009-09-23T11:58:51Z
From: Roger Bivand
Subject: 2D interpolation
In-Reply-To: <2BAF1F6D-5B9D-4062-8432-3CDEB1F4F7EF@env.ethz.ch>
On Wed, 23 Sep 2009, Christoph Hofer wrote:
> Dear list
>
>
> I am looking for a function that interpolate data points z in the x,y-plane.
> For the one-dimensional case this would be a "natural cubic spline". Is there
> a package where I find a function for "natural thin plate splines" for
> interpolation?
>
> I found in the akima package the function interp. But this is not a thin
> plate spline interpolation.
RSiteSearch("thin plate spline")
pulls up:
http://finzi.psych.upenn.edu/R/library/fields/html/Tps.html
as second hit for me. Try Tps() in the fields package.
Roger
>
>
> Best regards
>
>
> Christoph Hofer
>
>
>
>
>
> ____________________________
> ____________________________
> ETH Zurich
> Christoph Hofer
> Soil and Terrestrial Environmental Physics
> Institute of Terrestrial Ecosystems
> CHN E 50.2
> Universit?tstrasse 16
> 8092 Zurich, Switzerland
> phone (+41) - (0)44 - 633 63 65
> fax (+41) - (0)44 - 633 11 23
> e-mail: christoph.hofer at env.ethz.ch
>
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--
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no