[R] plane3d

[Uwe Ligges]

Jim Milks wrote:
> I am attempting to fit a logistic regression plane to a 3-D scatterplot 
> (which was generated using scatterplot3d).  I've noticed that the help 
> pages of scatterplot3d include a function titled "plane3d."  However, 
> when I attempt to use the function, I get the following message:
> 
> Error: couldn't find function "plane3d"
> 
> I've searched the archives and found no references to such a function.  
> Is (or was) plane3d an actual function or is there just a typo in the 
> scatterplot3d help page?  If it is a function, how would I tap into it?


Please read ?scatterplot3d carefully and completely. The function is 
*retunred* in form of a closure from a call to scatterplot3d() and there 
is an example how to use it in the examples section of the help file:

   library(scatterplot3d)

   ## example 5
   data(trees)
   s3d <- scatterplot3d(trees, type="h", highlight.3d=TRUE,
       angle=55, scale.y=0.7, pch=16, main="scatterplot3d - 5")
   # Now adding some points to the "scatterplot3d"
   s3d$points3d(seq(10,20,2), seq(85,60,-5), seq(60,10,-10),
       col="blue", type="h", pch=16)
   # Now adding a regression plane to the "scatterplot3d"
   attach(trees)
   my.lm <- lm(Volume ~ Girth + Height)
   s3d$plane3d(my.lm, lty.box = "solid")

Uwe Ligges




> Thanks.
> 
> Jim Milks
> Graduate Student
> Environmental Sciences Ph.D. Program
> Wright State University
> 3640 Colonel Glenn Hwy
> Dayton, OH 45435
> 
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