Gábor Csárdi wrote:
On Fri, Aug 28, 2009 at 1:33 PM, Gabor
Grothendieck<ggrothendi...@gmail.com> wrote:
[...]
I could have used this functionality in a previous project as well; however,
for Oliver's application just pass the filename to the python program use that
in the <img src=...> tag (or have the python program pass the filename to
the R program).
If there is some aspect of this problem that has not been explained that
truly does make passing the graphic file contents to the python
program desirable
then have R write out the graphic file and then have R read it back in.
Unfortunately, this is not always a good solution. For example, I am
running Rserve with connections from untrusted users. The Rserve
process is not allowed to write to the disk at all, but then there is
no easy way to create plots.
The patch Romain mentioned above looks like a good solution.
The R connections patch worked well on Unix at the time, but it was
never tested on the other R supported platforms. I believe this was R
core's complaint about not considering it as a patch.
There's yet another option, although someone would need knowledge of
converting raw image data to PNG (or other) format in memory: the Cairo
package allows access to the raw image data from R itself, although it's
undocumented and experimental. The functions are defined in R/imgtools.R
within the Cairo source package.
Jeff
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