R help - Mar 2011 - Unexpected behavior of windows() command followed by print(LATTICEPLOT)

Colleagues
	R: 2.12.2
	Windows 7 (64-bit)
I am experiencing unexpected behavior in the following situation:
	FILE1:
		windows()
		plot(1, 1,) 
	FILE2:
		windows()
		PLOT	<- code.to.create.a.lattice.object()
		print(PLOT)
		Sys.sleep(10)
	FILE3:
		PLOT	<- code.to.create.a.lattice.object()
		print(PLOT)
		Sys.sleep(10)

When I open an R session and "source()" either FILE1, FILE2, or FILE3,
an R graphics window open and a graphic appears.

In contrast, I type the following at a command prompt:
	R --slave --no-save < FILE1		this opens the graphics window and displays a
graphic
	R --slave --no-save < FILE2		no graphics window
	R --slave --no-save < FILE3		no graphics window

I assume that the problem relates to printing options for lattice objects.  Can
someone direct me to how to solve this?

Dennis

Dennis Fisher MD
P < (The "P Less Than" Company)
Phone: 1-866-PLessThan (1-866-753-7784)
Fax: 1-866-PLessThan (1-866-753-7784)
www.PLessThan.com

On Mar 22, 2011, at 4:14 PM, Dennis Fisher wrote:
> Colleagues
> 	R: 2.12.2
> 	Windows 7 (64-bit)
> I am experiencing unexpected behavior in the following situation:
> 	FILE1:
> 		windows()
> 		plot(1, 1,)
> 	FILE2:
> 		windows()
> 		PLOT	<- code.to.create.a.lattice.object()
> 		print(PLOT)
> 		Sys.sleep(10)
> 	FILE3:
> 		PLOT	<- code.to.create.a.lattice.object()
> 		print(PLOT)
> 		Sys.sleep(10)
>
> When I open an R session and "source()" either FILE1, FILE2, or  
> FILE3, an R graphics window open and a graphic appears.
>
> In contrast, I type the following at a command prompt:
> 	R --slave --no-save < FILE1		this opens the graphics window and  
> displays a graphic
> 	R --slave --no-save < FILE2		no graphics window
> 	R --slave --no-save < FILE3		no graphics window
>
> I assume that the problem relates to printing options for lattice  
> objects.  Can someone direct me to how to solve this?
Does this answer, at least to extent of noting that the developers  
would have expected you to print you graphics output to a file device?

http://finzi.psych.upenn.edu/R/Rhelp02/archive/115574.html

-- 

David Winsemius, MD
West Hartford, CT