(I don't think transposition is needed per se, just feed it in as-is and compute item-item similarity. It would be fine, sure, to transpose and compute user-user similarity, if you wanted. Rating is not needed.)
On Thu, Feb 17, 2011 at 8:42 PM, Ted Dunning <[email protected]> wrote: > Yes. > > Simply transpose your data and then use standard similarity techniques. > > Transposition in this case means that you would reformulate your data to be > > group1: user ... user > > In practice, the standard input form for Mahout recommendations is more like > this: > > user group rating > > where your ratings will always be 1. Simply redesignation of the two first > columns suffices to transpose data like this. >
