> Last I looked at the source code of e1071 and of the core itself and 
> recognized (I hope I understood this), that you (and the "e1071" people) use 
> "as.double()" and give ".C" an array and one have to "parse" the matrix again 
> in the C function.

I think this is the simplest way to handle matrices at this level - after all a 
matrix is really an homogenous array of data with indexing information ?

I have an example of handling matrices (using .Call) in an old post:

http://www.theresearchkitchen.com/blog/archives/113

Cheesr
Rory


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