Have you considered the "fda" package and the companion book,
"Functional Data Analysis with R and Matlab" (Springer, 2009) by Ramsay,
Hooker and Graves? This will NOT help you directly with bathymetry =
f(long, lat), but will help with b=f(x)+e AND with translations between
Matlab and R.
To fit z=f(x,y), you may want "thin plate splines". To find R
capability for those, you might install the "sos" package and try the
following (which requires Internet access):
library(sos)
tps <- ???'thin plate splines'
summary(tps) # 38 help pages found in 9 packages
tsp # opens a web browser
The "sos" package includes a vignette, which is essentially a copy
of an article from the latest issue of The R Journal.
Hope this helps.
Spencer
karine heerah wrote:
Hi everybody.
i have 2 datasets : one with a long grid a lat grid and a bathymetry grid
the second one only has the long and lat coordinates.
So i want to know the bathymetry associated to the second dataset. I thought it
was a good idea to do an interpolation between the two datasets. I find a
script doing that on matlab but i want to do it on R. Do you how to do it?
for ii = 1:length(seal_dive_depth07)
seal_bathy_depth07(ii) = interp2(long,latg,A,seal_lon07(ii),seal_lat07(ii));
end
Karine HEERAH
Master 2 mention "océanographie et environnements marins", parcours océanique
42 rue Salvador Allende
92000 Nanterre
06.61.50.97.47
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Spencer Graves, PE, PhD
President and Chief Operating Officer
Structure Inspection and Monitoring, Inc.
751 Emerson Ct.
San José, CA 95126
ph: 408-655-4567
______________________________________________
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