R already contains platform-independent code to open a graphics device: dev.new() The device thus created is specified in options(), but by default is appropriate for the current platform.
It's good practice to use this function instead of calling quartz() directly so that your code can be run on other systems. Sarah On Thu, Sep 1, 2016 at 11:34 AM, Franklin Bretschneider <brets...@xs4all.nl> wrote: > Dear Tom Mosca, > > Re: > >> Using a PC I have written the R code for my elementary statistics students. >> One of the students has a Mac. Should the same lines of code work on a Mac? >> >> >> >> Where can the student find support for R on her Mac? I don't know anything >> about them, and have never used one. >> > > > Some commands are platform-dependent though, such as opening the standard > graphics window [quartz() vs windows()]. > This needn't be a problem, since in R a script can sense on which platform it > is running. > Some years ago I wrote a platform-sensing graphics routine, reproduced below. > This might help to prevent problems with simple graphics demos, and can no > doubt be extended to other commands. > > Success, and > Best regards, > > > Franklin Bretschneider > Dept of Biology > Utrecht University > brets...@xs4all.nl > > > > > # function PIgraph.r > # Platform-Independent graphics init > # determines platform (Windows or Mac) then chooses device type > # F. Bretschneider; 04-08-2009 > # ==================== > > PIgraph <- function(w,h) if(.Platform$OS.type == "windows") windows(w=w, h=h) > else quartz(w=w, h=h) > > # example application > x=-3:3 > y=x^2 > PIgraph(8,6) > plot(x,y, type = 'o') > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. -- Sarah Goslee http://www.stringpage.com http://www.sarahgoslee.com http://www.functionaldiversity.org ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
