[R] surf.ls

m p mzp3769 at yahoo.com
Thu Dec 9 18:11:31 CET 2004


Hello,
I am looking into description of surf.ls(spatial)
and see under value $beta - the coefficients.
When I use polynomial of degree 2 to fit surface
I expect to get 4 coefficients:

z = a_1 x^2 + a_2 xy + a_3 y^2 + a_4

What do beta really stand for and why do I get
$beta vector of length 6?

Thakns,
Mark




More information about the R-help mailing list