Re: [R] operations on sparse matrices, and dense intermediary steps

Hi Jose, JQ == Jose Quesada ques...@gmail.com on Sat, 24 Oct 2009 23:49:08 +0200 writes: JQ -BEGIN PGP SIGNED MESSAGE- JQ Hash: SHA1 JQ Hi, JQ I'm doing some basic operations on large sparse matrices, for example JQ getting a row. JQ it takes close to 30

[R] operations on sparse matrices, and dense intermediary steps

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi, I'm doing some basic operations on large sparse matrices, for example getting a row. it takes close to 30 seconds on a 3Ghz machine, and shots the memory usage up to the sky. I suspect there are dense intermediary steps (which, if true would