Something like this:

u=seq(from=-pi, to=pi, length=1000)
f=sin(u)
Cairo("example.pdf", type="pdf",width=12,height=12,units="cm",dpi=300)
par(cex.axis=.6,col.axis="grey",ann=FALSE, lwd=.25,bty="n", las=1, tcl=-.2,
mgp=c(3,.5,0))
xlim=c(-pi,pi)
ylim=round(c(min(f),max(f)))
plot(u,f,xlim,ylim,type="l",col="firebrick3", axes=FALSE)
axis(side=1, lwd=.25, col="darkgrey", at=seq(from=xlim[1], to=xlim[2],
length=5))
axis(side=2, lwd=.25, col="darkgrey", at=seq(from=ylim[1], to=ylim[2],
length=5))
abline(v=seq(from=xlim[1], to=xlim[2], length=5), lwd=.25,lty="dotted",
col="grey")
abline(h=seq(from=ylim[1], to=ylim[2], length=5), lwd=.25,lty="dotted",
col="grey")
dev.off()

Notice how the canvas' margins are relatively far from the plotting area.

Thanks,

Eduardo

On Thu, Jan 6, 2011 at 1:00 AM, David Winsemius <dwinsemius@comcast.net>wrote:

>
> On Jan 5, 2011, at 9:38 PM, Eduardo de Oliveira Horta wrote:
>
>  Hello,
>>
>> I want to save a pdf plot using Cairo, but the canvas of the saved file
>> seems too large when compared to the actual plotted area.
>>
>> Is there a way to control the relation between the canvas size and the
>> size
>> of actual plotting area?
>>
>>
> OS?,  ... example?
>
> ==
>
> David Winsemius, MD
> West Hartford, CT
>
>

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