[R] Scatterplot3d model reporting question

From: Max <mnevill_at_exitcheck.net>
Date: Tue, 18 Dec 2007 11:02:18 -0800


I've used the scatterplot3d function to graph some data and had it graph a "smooth" fit. Is there a way to actualy find out the function of the surface? I've looked through the help and figured out how to get it to report the following:

Family: gaussian
Link function: identity

Formula:
y ~ s(x, z)

Parametric coefficients:

            Estimate Std. Error t value Pr(>|t|) (Intercept) 0.20750 0.01223 16.97 <2e-16 ***
---

Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Approximate significance of smooth terms:

         edf Est.rank     F  p-value
s(x,z) 8.403       17 9.729 1.76e-14 ***

---

Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

R-sq.(adj) = 0.684 Deviance explained = 70.9% GCV score = 0.017692 Scale est. = 0.016151 n = 108

But I'm still not really sure what I'm looking at, either that or "smooth" means something different than I thought. Any help would be great!

thanks,

-Max



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