On 25 March 2013 at 12:50, Kevin Horan wrote:
| I posted this in openbabel-devel but didn't get much help, so hopefully
| someone here can help. I don't think its too openbabel specific.
|
| I would like to make use of open babel from within the R language.
| Initially I just need to do some format conversions, but may expand the
| usage to other parts of OpenBabel as well. I am familiar with embedding
| C/C++ code in R, but I'm having some trouble with the plugin mechanism
| of OpenBabel in this case. The problem is that the formats are not
| available when I run the OpenBabel code from within R. So, for example,
| if I search for the SDF format like so:
| OBFormat *format = conv.FindFormat("SDF");
[...]
| The way it works normally in OpenBabel is that each plugin is its
| own shared library and then they get loaded at run time with the dlopen
| function (on linux at least). I have verified that this code is still
| being executed when called from within R, but it doesn't work for some
| reason.
I would try to start from the smallest possible working examples. R itself
uses dlopen (see eg $RHOME/modules/ for the files it loads), and so does
OpenBabel. Maybe some wires get crossed. You may well have to dig down with
the debugger and see what assumptions / environment variables / ... are valid
or invalid between the working and non-working case.
Dirk
--
Dirk Eddelbuettel | e...@debian.org | http://dirk.eddelbuettel.com
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