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
____________________________
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ETH Zurich
Christoph Hofer
Soil and Terrestrial Environmental Physics
Institute of Terrestrial Ecosystems
CHN E 50.2
Universitätstrasse 16
8092 Zurich, Switzerland
phone (+41) - (0)44 - 633 63 65
fax (+41) - (0)44 - 633 11 23
e-mail: [email protected]
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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
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