creating a pdf in R that is vertically justified

Question

Question: how can you create a pdf where the output is vertically justified, with for example, a one inch margin on top using pdf().

For example in

pdf(file='test.pdf', paper='letter', pagecentre=F)
### code for plot here ###
dev.off()

is there an option where it generate output that starts from the top of the page rather than printing from the bottom of the page (which is what happens when pagecentre=F). Or will this require some adjustment of settings in par()?

Answer 1

I always use

pdf(file="/tmp/foo.pdf", width=10.5, height=8)
plot(....)
dev.off()

which nicely fills the page with just 1/2 inch spacing. You can flip width and height arguments to go to 'portrait' rather than 'landscape'.