Is there a regression surface demo?

Dear Josh,

On Mon, Oct 11, 2010 at 3:15 PM, Joshua Wiley <jwiley.psych at gmail.com> wrote:

Hi All,

Does anyone know of a function to plot a regression surface for two
predictors? ?RSiteSearch()s and findFn()s have not turned up what I
was looking for. ?I was thinking something along the lines of:
http://mallit.fr.umn.edu/fr5218/reg_refresh/images/fig9.gif

I like the rgl package because showing it from different angles is
nice for demonstrations. ?I started to write my own, but it has some
issues (non functioning code start below), and I figured before I
tried to work out the kinks, I would ask for the list's feedback.

Any comments or suggestions (about functions or preferred idioms for
what I tried below, or...) are greatly appreciated.

Josh

[snip]

I haven't tried to debug your code, but wanted to mention that the
Rcmdr:::scatter3d function does 3-d scatterplots (with the rgl
package) and adds a regression surface, one of 4 or 5 different types.
?If nothing else, it might be a good place to start for making your
own.

A person can play around with the different types in the Rcmdr under
the Graphs menu. ?Or, from the command line:

library(Rcmdr)
with(rock, scatter3d(area, peri, shape))

I hope that this helps,
Jay