On Apr 21, 2011, at 9:51 AM, Karl-Dieter Crisman wrote: > Thanks for your replies, Dirk and Matt. > > On Thu, Apr 21, 2011 at 7:49 AM, Dirk Eddelbuettel <e...@debian.org> wrote: >> >> On 20 April 2011 at 12:16, Karl-Dieter Crisman wrote: >> | ++++ >> | >> | R is now configured for i686-pc-linux-gnu >> | Source directory: . >> | Installation directory: /home/sageserver/sage/local >> | C compiler: gcc -std=gnu99 >> | -I/home/sageserver/sage/local/include >> | -L/home/sageserver/sage/local/lib/ Fortran 77 compiler: >> | sage_fortran -g -O2 >> | C++ compiler: g++ -g -O2 >> | Fortran 90/95 compiler: sage_fortran -g -O2 Obj-C compiler: >> | Interfaces supported: X11 >> | External libraries: readline, BLAS(ATLAS), LAPACK(generic) >> | Additional capabilities: PNG, NLS >> | Options enabled: shared R library, R profiling >> | Recommended packages: yes >> | >> | >> | However: >> | >> | >> | > capabilities() >> | jpeg png tiff tcltk X11 aqua http/ftp sockets >> | FALSE FALSE FALSE FALSE FALSE FALSE TRUE TRUE >> | >> | libxml fifo cledit iconv NLS profmem cairo >> | TRUE TRUE TRUE TRUE TRUE FALSE FALSE >> >> Random guess: did you connect via ssh without x11 forwarding? > > Almost certainly, yes. (I am an interlocutor right now for someone > who is actually doing this, my apologies.) > But it's a machine we just ssh into, I'm pretty sure, though it does > serve up web pages. > >> I cannot see how configure find png.h and libpng but the binary fails. As all >> other X11 related formats are also shown false, methinks you are without a >> valid DISPLAY. > > That is quite likely. So it sounds like for png() to be set to use > the X11 device, there has to (somewhere) be a visual output - > presumably that is the part LOGICAL(ans)[i++] = X11; in Matt's answer. > >> That is actually an issue related to your headless use---which is what Sage >> may default too; see the R FAQ on this and the prior discussion on the >> xvfb-run wrapper which 'simulates' an x11 environment (which you need for >> png). So maybe you should revisit the Cairo devices---they allow you >> plotting without an x11 device (and also give you SVG). >> > > Yeah, and I saw your SO answer on this (after the fact) as well. > > In some sense, we are just trying to get graphics on one machine. > Note that we have installed the cairo devel package on this very > machine, but it's not being picked up - maybe it's looking in the > wrong place? That is one of the reasons this is confusing. > > But in a larger sense, because of Sage's "batteries included" > philosophy (which we know not everyone agrees with!), we would like to > have a one-shot way so that *everyone* will see R graphics, not just > people whose binary happens to have been compiled on a machine that > has X and a display. If that means adding 22.5 MB to our tarball for > Cairo... maybe, maybe not. >
Maybe yes in that case - that's what we do in Mac binaries -- and on Mac users always expect "batteries included" so we include libcairo statically. (The same applies for R packages like Cairo which provides png support independent of X11). Cheers, Simon > I won't copy Matt's message here, but I appreciate the pointers to > exactly where these things are defined very much - without knowing > where to look, it would be a long slog. Hopefully we'll have some > success! Thanks for the replies, and for any other ideas. > > Karl-Dieter > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > > ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel