[R] non-linear regression for 3D data

[szisziszilvi]

right. How does it come that if I devide the result vector with
10*interception, I get a much better result?

> zz2 <- 25.86 -2239.86*mp$xx -595.01*mp$xx*mp$xx + 2875.54*mp$yy +
> 776.84*mp$yy*mp$yy
> mp$zz2 <- zz2
> library(lattice)
> cloud(zz2/258.6 + zz ~ xx * yy, data=mp)


looks quite pretty.

http://r.789695.n4.nabble.com/file/n2322812/output.jpeg 
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