title: SVD for sparse matrix in R
body: <p>I've got a sparse <code>Matrix</code> in R that's apparently too big for me to run <code>as.matrix()</code> on (though it's not super-huge either).  The <code>as.matrix()</code> call in question is inside the <code>svd()</code> function, so I'm wondering if anyone knows a different implementation of SVD that doesn't require first converting to a dense matrix.</p>