I was trying to get together a fully observed matrix for collaborative filtering. For example, some data matrix that was at least 500 by 500, of say for an example, 500 users that all rather the same 500 movies.

I tried getting something like this from the netflix data set and only got around 256 by 150.

Is there a data set that is already processed like this that I can use?

Or maybe a suggested data sat that the chances of getting a complete large matrix is high. The larger the better.