[Rcpp-devel] Using sparse matrices from the Matrix package in Rcpp

[Glenn Lawyer]

I would suggest using the eigen library, Rccp has an interface to 
this. Alternately, you could link to the boost graph library.

+glenn

On 06/24/2012 06:12 PM, Søren Højsgaard wrote:
> Dear list
>
> I have code for graph operations where I represent graphs as adjacency matrices (matrices with 0's and 1's). When graphs grow large storing all the 0's becomes uneconomical, so I want to use sparse matrices (from the Matrix package) for large graphs instead. Simple indexing operations like M[i,j] however are very slow, so I wonder if there are ways of dealing with sparse matrices (and rapid indexing) in the Rcpp framework. Apologies if I have overlooked posts on this topic.
>
> Regards
> Søren
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   Dr. Glenn Lawyer
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   Max-Planck-Institut für Informatik
   Computational Biology and Applied Algorithmics
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   http://bioinf.mpi-inf.mpg.de/~lawyer


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