You might try using the Cairo package, which will allow you to bypass using
the Windows graphics device and can give you anti-aliasing.  As the manual
says:

"It is ideal for use in server environments (file output) and as a
replacement for other devices that don't have Cairo's capabilities such as
alpha support or anti-aliasing."

http://www.rforge.net/Cairo/
http://cran.r-project.org/src/contrib/Descriptions/Cairo.html

- Mose

On Nov 16, 2007 12:28 PM, Brian S Cade <cadeb@usgs.gov> wrote:

> I have a recurring graphics issue that I've not been able to resolve with
> R.  If I make a series of regression estimates and then plot the estimated
> function for the regression lines over a scatter plot of the data, e.g.,
> using a sequence of plot( ) and lines ( ) similar to those below
>
>
> plot(dep12spp13ph1$DAYSWETm2,dep12spp13ph1$AFTERDECOMP,pch=dep12spp13ph1$spp,cex=
> 0.75,ylab="Proportion
> of biomass after leaching", xlab="Number of days in
> wetland",xlim=c(0,250),ylim=c(0,1))
> xplot<- 0:243
> xplotbsk64deg1<-bs(xplot,knot=62,degree=1,Boundary.knots=c(0,243))
> lines(xplot,exp(xplotbsk64deg1 %*%
> ph1.decomp.75.bs$coef[c(1,2)]),col="blue")
> lines(xplot,exp(xplotbsk64deg1 %*%
> ph1.decomp.75.bs$coef[c(3,4)]),col="red")
>
> and then attempt to copy the resulting graph from R graph window into a
> Windows metafile to paste into another application like Power Point or
> Word, the resulting regression lines have alot of jagged edges due to
> resolution/pixelation issues.  For a nonlinear function like the one
> plotted above, changing the number of pairs of points evaluated with the
> lines( ) function makes the plot look better or worse but never as good as
> is possible if there was some sort of "smoothing" done on the plotted line
> pixels.  I do this type of graphing in SYSTAT all the time and it looks
> great (but I would prefer not to have to jump back and forth between R and
> SYSTAT ).   If I save the graph (or print) from R into an encapsulated
> Post-Script file, then the resulting regression line pixels are "smoothed"
>
> out and look nice, but then the symbols have been decomposed into their
> constituent elements and are screwed up.  I'm guessing somewhere in R's
> graphing parameters/controls there might be a solution but I've yet to
> find it.  Any suggestions would be welcome.
>
> Brian
>
> Brian S. Cade
>
> U. S. Geological Survey
> Fort Collins Science Center
> 2150 Centre Ave., Bldg. C
> Fort Collins, CO  80526-8818
>
> email:   brian_cade@usgs.gov
> tel:  970 226-9326
>        [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

	[[alternative HTML version deleted]]

