Hi,
I don't know the answer but here is how I would try to get it from the
source:
$ cd R-devel/src
$ grep -R "R Software" *
Binary file library/grDevices/src/grDevices.so matches
library/grDevices/src/devPS.c: fprintf(fp, "%%%%Creator: R Software\n");
Binary file library/grDevices/src/devPS.o matches
$ wc library/grDevices/src/*.c
426 1928 10606 library/grDevices/src/chull.c
195 658 5395 library/grDevices/src/devNull.c
775 2771 24480 library/grDevices/src/devPicTeX.c
7592 26813 212324 library/grDevices/src/devPS.c
1375 5342 48939 library/grDevices/src/devQuartz.c
3401 12322 100782 library/grDevices/src/devWindows.c
75 273 2113 library/grDevices/src/init.c
189 807 7436 library/grDevices/src/qdBitmap.c
165 646 5416 library/grDevices/src/qdPDF.c
14193 51560 417491 total
Somewhere in the 14193 lines of code is your answer. Probably also worth
looking in the modules/X11/ and unix directories
Romain
--
Romain Francois
Independent R Consultant
+33(0) 6 28 91 30 30
http://romainfrancois.blog.free.fr
David M Smith wrote:
Oftentimes, I see graphs on the web that *look* like they've been
produced by R, but I can never be sure. Or can I? I notice that
PostScript files include a "%%%Creator: R Software" line, but do R
graphics drivers encode any identifying information in GIF or PNG
files more commonly used on the web? And of so, would such evidence
necessarily be obliterated in post-processing (e.g cropping)?
I'm trying to do an informal survey of R's use to create statistical
graphics on the web, and if there's a way to identify graph files I
see as coming from R it would help a lot.
Thanks,
# David Smith
--
David M Smith <da...@revolution-computing.com>
Director of Community, REvolution Computing www.revolution-computing.com
Tel: +1 (206) 577-4778 x3203 (Seattle, USA)
______________________________________________
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
