On Sat, Mar 13, 2010 at 4:27 PM, Jillian E Kozyra <jill...@gmail.com> wrote: > Dear Colleagues, > > We are attempting to create trees using R with our Ruby on Rails > application. However, we are running into a problem involving the > creation of the graphic. We would like them to be in either jpg or png > format so that users can save, but due to a lack of control over our > sever we are unable to start X11 server. Is there a way to create > these images without using X11 server? >
Not sure what version of R you are using, but the png() device hasn't needed an X11 server since way back when. Watch: $ export -n DISPLAY $ R > png() > plot(1:10) > dev.off() > q() then I have a very fine Rplot001.png file. Now it may be that you can't compile PNG support without X11 being there at compile time, but if you can compile R on a workstation with X11 support then that R should work find on your server to produce pngs even without X11 support there and then. jpeg() device works the same - X11 not needed at runtime. What makes you think it's lack of X11 that is making png or jpeg devices fail? Run the capabilities() function and see if your R has png and jpeg support - my suspicion is that you've compiled it on the server with no X11 headers. It doesn't need a server at runtime. Barry ______________________________________________ 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.
