My R version is R 2.7.0, but the png still can not be used when I embed R in MyApp
Dirk Eddelbuettel wrote: > > > > Wrong list, so re-directing to r-help. Consider r-sig-debian for Debian > questions too, but subscribe or else your posts bounce. > > On 4 June 2008 at 07:18, Rongrong wrote: > | > | I am a new R user and I have a question of embedding R to generate png > | On Debian, I installed R by source code. > | > | Now I want to embed R in an application which name is MyApp, and run > | the following syntax: > | png(filename="/tmp/Rplot%03d.png) > | example(rect) > | dev.off() > | > | Unfortunately I get the following error message: > | > | Error in X11(paste("png::", filename, sep = ""), width, height, > pointsize, > | : > | unable to start device PNG > | Calls: png > | In addition: Warning message: > | In png(filename = "/tmp/test%03d.png") : > | unable to open connection to X11 display '' > > See the R FAQ. > > | But I could run above syntax from R, and the result is correct, I can > get > | two png files from /tmp/ folder. > | > | I try to respectively run same syntax(the syntax is: > | capabilities()[["png"]]) > | under two modes, the result is different: > | In R the result is TRUE, but when MyApp embed R the result is FALSE > > Because in case you have an x11 display, and in the other your don't. No > display, no x11. > > | Then I used bitmap(file="/tmp/test") when embed R in MyApp, but get > another > | error message: > | > | Error in bitmap(file = "/tmp/test") : sorry, 'gs' cannot be found > > Fix that via > $ sudo apt-get install ghostscript > > | Besides, I have installed xvfb. What I need do? > > Almost there. Wrap your call to MyApp in svfb-run, ie do > > $ xvfb-run MyApp [other parameters] > > and you get the virtual x11 device that png needs. > > R 2.7.0 should also alleviate the need for an x11 device due to its new > cairo-based device code. While you didn't tell as which R version you are > running, I suspect it is not the one the current one. > > Dirk > > -- > Three out of two people have difficulties with fractions. > > ______________________________________________ > 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. > > -- View this message in context: http://www.nabble.com/Re%3A--Rd---An-issue-happens-Embed-R-and-redirt-png-file-tp17653928p17662473.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.