matrix.csr %*% matrix --> matrix
The question is even more pressing for me now given that I no longer can convert some csr matrices to the regular ones for scaling. (http://article.gmane.org/gmane.comp.lang.r.general:279305) Any suggestions? (the original csr matrix is too large to be converted to a regular one, but the product is small enough).
* Sam Steingold <fqf at tah.bet> [2012-08-27 14:58:47 -0400]: When a sparse matrix is multiplied by a regular one, the result is usually not sparse. However, when matrix.csr is multiplied by a regular matrix in R, a matrix.csr is produced. Is there a way to avoid this? Thanks!
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