Sparse vectors?

[Hydrotoast]

Hi,

Is there support for sparse vectors using this library? For example, I may want to construct a distributed, sparse rating matrix consisting of (num_users, num_items) which represents the set of items that each user has rated.

I would like to perform row-wise operations on this without representing the entire num_items dense vector.

[jwittenbach]

@Hydrotoast This is something that we have considered and think would be great, but we have not had the time to try implementing yet. It's good to know that it would be useful to others.