The problem is a bit weird.

This does not work:

ps.options=setEPS()
postscript(file="exponcoverapprox.eps")
boxplot(test[30,1:500],test[90,1:500],test[150,1:500],test[210,1:500],test[270,1:500],test[330,1:500],test[390,1:500],names=c("1","3","5","8","10","13","1"),outline=FALSE,ylim=c(0.01,50),log="y", xlab = "xvalue",ylab="yvalue",boxwex=0.5, pars 
=list(whisklwd=0,staplelwd=0))
dev.off()




This works
postscript(file="exponcoverapprox.eps")
boxplot(test[30,1:500],test[90,1:500],test[150,1:500],test[210,1:500],test[270,1:500],test[330,1:500],test[390,1:500],names=c("1","3","5","8","10","13","1"),outline=FALSE,ylim=c(0.01,50),log="y", xlab = "xvalue",ylab="yvalue",boxwex=0.5)
dev.off()
 


To not bother you with the details, the only difference is the pars 
=list(whisklwd=0,staplelwd=0) at the end of the boxplot , which I use to remove the whiskers fromt he blot.

B.R



________________________________
From: Marc Schwartz <marc_schwartz@me.com>

Cc: "R-help@r-project.org" <R-help@r-project.org>
Sent: Tuesday, August 16, 2011 7:38 PM
Subject: Re: [R] postscript( does not save the plot

On Aug 16, 2011, at 12:32 PM, Alaios wrote:

> Dear all,
> I am using the following code to write the plot to an eps format
> 
> postscript(file="test.eps",horizontal=FALSE)
> 
> boxplot(test[30,1:500],test[90,1:500],test[150,1:500],test[210,1:500],test[270,1:500],test[330,1:500],test[390,1:500],names=c("1","3","5","8","10","13","1"),outline=FALSE,ylim=c(0.01,50),log="y", xlab = "xvalue",ylab="yvalue",boxwex=0.5, pars =list(whisklwd=0,staplelwd=0))
> 
> dev.off()
> 
> 
> This creates a 6kb eps file, that can not be opened by any program. I tired with photoshop gimp, acrobat reader. This is the normal process I follow to save my plots.
> 
> dev.off always returns 1.
> 
> and the boxplot function succesfullu does the plot in the screen.
> 
> What might be the problem?
> 
> I would like to thank you in advance for your help
> 
> B.R
> Alex



You did not create an EPS file. See ?postscript and pay attention to the fourth paragraph under Details:

The postscript produced for a single R plot is EPS (Encapsulated PostScript) compatible, and can be included into other documents, e.g., into LaTeX, using \includegraphics{<filename>}. For use in this way you will probably want to use setEPS() to set the defaults as horizontal = FALSE, onefile = FALSE, paper = "special". Note that the bounding box is for the device region: if you find the white space around the plot region excessive, reduce the margins of the figure region viapar(mar=).


HTH,

Marc Schwartz
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