[R] Tps regression question

[Paola Lecca]

Dear all,

I'm a beginner in spatial regression, therefore, excuse me in advance for
the stupid question.

I'm using the function Tps of field library. As I read in help, the
assumed model for this regression is additive  Y = f(X) + e  where f(X)
is a d dimensional surface.

I have understood that d in not an argument to specify in Tps(x, Y, ...).

How can I obtain d ?

Thanks a lot.
Paola.

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