[R-SIG-Mac] quartz.save and tilde

hadley wickham h.wickham at gmail.com
Wed May 2 08:37:03 CEST 2007

On 5/1/07, Simon Urbanek <simon.urbanek at r-project.org> wrote:
> DEnis,
> On May 1, 2007, at 4:04 PM, Chabot Denis wrote:
> > Until now, I've been able to use the tilde to replace "/Users/
> > chabotd" in all my R scripts, be it directly or with the use of
> > "paste".
> >
> > I am experimenting with quartz.save to produce png files to save
> > the step of producing pdf and transforming them into png later. I
> > need png to reduce file size for a series plots with thousands of
> > points, even though I prefer vector drawings for most situations.
> >
> > I have not been able to find any documentation on quartz.save, but
> > if I include the tilde in the file name, something that works with
> > pdf or png devices, it does not work (for me) with quartz.save. I
> > need to give the unabridged path.
> >
> > Is there a reason for this?
> >
> Yes, the tilde is not expanded. Why is it not expanded? Because the
> author didn't think of it ;). It's fixed now.
> > Also, what are the options in quartz.save? I've only managed to use
> > file="path and file"  and type="png" or type="pdf". I've tried to
> > control resolution (res=300) but it had no effect, so for now I
> > change the size of the quartz graphics when I call quartz (which
> > forces me to change pointsize as well to keep proportions of text
> > relative to drawing size the same.
> >
> file, type and device are the only options of quartz.save and the
> purpose is to save the image "as-is", directly from the Quartz
> window, so res doesn't make sense here (it would no longer be a
> direct snapshot of the window). I guess it would be possible to do
> what you described, though (Quartz->PDF->PNG of any resolution). I'll
> see if there is an easy way to do that ...

might give you some ideas - having a native quartz png output device
would be fantastic.


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