R help - Mar 2009 - smoothing a matrix (interpolate in plane)

Hi R-users,

I'd like to smooth a matrix to dismiss spikes and to interpolate in plane

example of a matrix:
Map[1:3,1:3]

      [,1] [,2] [,3]...
[1,] 34.4 34.2 35.1
[2,] 33.4 34.2 35.4
[3,] 34.1 33.2 32.1
....

dim(Map)[1] =/= dim(Map)[2]

What functions can I use?

Thanks a lot for any response, M

	[[alternative HTML version deleted]]

?rout?k <zroutik <at> gmail.com> writes:
> I'd like to smooth a matrix to dismiss spikes and to interpolate in
plane
> 
interp.loess in package tgp works nicely for me.

Dieter

the thin plate spline, or tensor product smooths built into `mgcv' might be 
useful here (by default mgcv does automatic bandwidth selection for these). 

On Sunday 01 March 2009 09:51, ?rout?k wrote:
> Hi R-users,
>
> I'd like to smooth a matrix to dismiss spikes and to interpolate in
plane
>
> example of a matrix:
> Map[1:3,1:3]
>
>       [,1] [,2] [,3]...
> [1,] 34.4 34.2 35.1
> [2,] 33.4 34.2 35.4
> [3,] 34.1 33.2 32.1
> ....
>
> dim(Map)[1] =/= dim(Map)[2]
>
> What functions can I use?
>
> Thanks a lot for any response, M
>
> 	[[alternative HTML version deleted]]
>
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