[R] Getting R to emit an image file as a pipe or Base64 stream: Mac OSX 10.3 - R 2.0.1
yzhang4 at pobox.une.edu.au
Fri Dec 3 07:15:23 CET 2004
If you want to call R from perl, why don't you do a simple system call like:
$callR="/usr/loca/bin/R CMD BATCH plotscript.R";
It is not necessary to start X display if anything can be done in background
On Fri, 3 Dec 2004 12:07:24 +1100 (EST)
"Thuan-Jin Kee" <kee at wehi.EDU.AU> wrote:
> Hi All,
> Anybody know how to make R emit base64 encoded text in some way that perl
> can grab it, instead of planting a file on your harddrive when calling
> JPEG or PNG?
> I've managed to get these scripts to work and put a file on the harddisk
> #!/usr/bin/perl -Wall
> # by jin kee. a simple script to demonstrate
> # the needed steps to get R to emit a jpeg.
> use strict;
> my($callR, $callRold);
> # need to start X if is isn't already started.
> `open /Applications/Utilities/X11.app`;
> #need to get let the R program know where to look
> #for the display immediately before calling
> #the R executible.
> $callR =<<MARKER;
> DISPLAY=:0.0; export DISPLAY;
> /usr/bin/R --vanilla <plotscript.R;
> # end script
> q(save = "no");
> My sysadmin says that the apache user can't write to the disk due to
> security policy, so he wants to know if I can emit the jpeg as a base64
> stream and embedd it into the dynamically generated tag using a DATA tag
> to inline the image.
> i've tried searching the R-project.org site and help.search() and no luck.
> R-help at stat.math.ethz.ch mailing list
> PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Yuandan Zhang, PhD
Animal Genetics and Breeding Unit
The University of New England
Armidale, NSW, Australia, 2351
E-mail: yzhang4 at metz.une.edu.au
Phone: (61) 02 6773 3786
Fax: (61) 02 6773 3266
AGBU is a joint venture of NSW Primary Industries
and The University of New England to undertake
genetic R&D for Australia's Livestock Industries
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