[R] two perspective plots in in plot

[Duncan Murdoch]

On 2/9/2007 4:16 PM, Greg Snow wrote:
> The rgl package has an rgl.postscript function that should do that for
> you (I think there was a bug discovered and fixed recently, so make sure
> to get the latest version).

Yes, that's right.  If you see any other bugs, please let me know.  (One 
known bug is not in rgl:  Mac OSX Preview won't show .pdf files created 
by rgl properly.  That's an Apple bug, not an rgl bug.  Please complain 
to them:  it's been known for more than a year.)

Duncan Murdoch
> 
> --
> Gregory (Greg) L. Snow Ph.D.
> Statistical Data Center
> Intermountain Healthcare
> greg.snow at intermountainmail.org
> (801) 408-8111
> 
> 
> 
>  
> 
> 
> ________________________________
> 
> 	From: Roland Rau [mailto:roland.rproject at gmail.com] 
> 	Sent: Friday, February 09, 2007 12:46 PM
> 	To: Duncan Murdoch
> 	Cc: Greg Snow; r-help
> 	Subject: Re: [R] two perspective plots in in plot
> 	
> 	
> 	Thanks Duncan and Greg.
> 	My current solution is to use the rgl-package.
> 	Is there an easy way to obtain a screenshot in eps- or
> pdf-Format from such an rgl-window?
> 	I saw the rgl.snapshot function but it does not provide this
> format. 
> 	
> 	So far, I take a snapshot, save it as jpeg and convert it to eps
> via jpeg2ps.exe
> 	Maybe not the most elegant way but the results are better than I
> anticipated.
> 	
> 	Thanks,
> 	Roland
> 	
> 	
> 	
> 	
> 	On 2/9/07, Duncan Murdoch <murdoch at stats.uwo.ca> wrote: 
> 
> 		On 2/9/2007 1:11 PM, Greg Snow wrote:
> 		> Probably the easiest way is to use the "wireframe"
> function in the
> 		> lattice package.  The second example in the help shows
> 2 surfaces (you
> 		> do need to combine the data into a single data frame).
> 
> 		>
> 		> If you really want to use the "persp" function, then
> you could create
> 		> the first plot, then call "par(new=TRUE)" and then do
> the 2nd plot, but
> 		> that would take a lot of thinking to get the axes and
> scales to line up 
> 		> properly and make it look good.
> 		
> 		Another alternative is to use the persp3d function and
> surface3d
> 		functions in the rgl package.  It would be quite tricky
> to get persp to
> 		handle hidden surfaces properly, whereas rgl will just
> do it (as long as 
> 		neither is transparent.  Transparency is hard.)
> 		
> 		For example, after running example(persp) so that x, y,
> and z contain
> 		values that were just used in
> 		
> 		persp(x, y, z, theta = 135, phi = 30, col = "green3",
> scale = FALSE, 
> 		       ltheta = -120, shade = 0.75, border = NA, box =
> FALSE)
> 		
> 		you can run
> 		
> 		  library(rgl)
> 		
> 		  persp3d(x,y,z, col="green3", aspect="iso", axes=FALSE,
> box=FALSE,
> 		xlab="", ylab="", zlab="") 
> 		
> 		  persp3d(x,y,(z + mean(z))/2, col="red", add=TRUE)
> 		
> 		and then rotate the surfaces to the desired viewing
> angle.
> 		
> 		Duncan Murdoch
> 		
> 
> 
>