[R-sig-finance] c++ and D-COM

[Dirk Eddelbuettel]

Hi Jordi,

On Wed, Aug 04, 2004 at 06:01:55PM +0200, Molins, Jordi wrote:
> 
> Hello,
> 
> I would like to call R functions from C++ code. The C++ code is not called
> from an R function, but it stands by itself. I have done research through
> google and it seems that before it was not possible to do what I wanted, but
> now with the D-COM port, it is possible (comment by Prof Ripley). Prof
> Ripley says also that in the documentation of the D-COM port there are C
> examples. 
> 
> I have looked in the folders of the (D)COM Server, but I have not found
> anything like an example (there is an scripting folder, but contains
> jscript, python and vbs, but nothing of c++).

The good folks in Vienna (i.e., Thomas Baier and Erich Neuwierth) have a
mailing list for DCOM that may answer this better:

http://mailman.csd.univie.ac.at/mailman/listinfo/rcom-l

Do report back, though, I had wondered about it too. :) 

> Is there a simple way to call R functions from C++ code? is it possible to
> have a simple example (like 2+2=4)?

Not from what I understand as you need to initialize the R engine (i.e. the
interpreter) but you'd get that via (D)COM.  Look for comments on the
r-devel list by, say, Thomas Lumley, Brian Ripley or Simon Urbanek.  Simon
also has a tcp/ip connected Rserve project that we worked with, but again,
no C examples there. Works from Java, and is platform neutral.

Hope this helps, Dirk

-- 
Those are my principles, and if you don't like them... well, I have others.
                                                -- Groucho Marx