2008/12/18 Dennis Schmidt <dennis.schm...@student.hpi.uni-potsdam.de>:
> No, haven't seen this so far. But it quite looks like what I'm looking for,
> so thanks a lot :-)
The png() device does not need an X server to connect to. I think it
used to in versions gone by, but not any more. Here I've disabled X so
that X11() doesn't work, but png() still does:
> x11()
Error in X11(d$display, d$width, d$height, d$pointsize, d$gamma,
d$colortype, :
unable to start device X11cairo
In addition: Warning message:
In x11() : unable to open connection to X11 display ''
> png(file="foo2.png")
> plot(1:10)
> dev.off()
null device
1
I suspect your R was compiled without png support. What does the
'capabilities()' function in R tell you?
> capabilities()
jpeg png tiff tcltk X11 aqua http/ftp sockets
TRUE TRUE TRUE TRUE FALSE FALSE TRUE TRUE
libxml fifo cledit iconv NLS profmem cairo
TRUE TRUE TRUE TRUE TRUE TRUE TRUE
- I've got png capability - have you? If not, you need to recompile
and find out why. When you run configure it should tell you what
capabilities it has figured out for itself. To get png support you'll
need the png-devel library and header files.
Anything else is speculation until we see capabilities()....
Barry
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