Binary preferences are fine. In fact, I generally recommend that all ratings and related information be distilled down to a single binary indicator such as you already have.
The fact that you have so few items will be both your advantage and disadvantage. It will help you avoid problems with sparsity and lack of overlap between users, but it will also make your life harder because theere aren't so many items to recommend. This will be exacerbated by your customers' tendency to exhaustively research items before purchase ... it is likely that they will know about most related items already. On Sun, Sep 11, 2011 at 10:01 AM, Manju <[email protected]> wrote: > ... have purchase data but not rating data ... > > Any advice on how best to approach the scenario with item or user based > recommendation (given the lack of spread in ratings/preferences)? > >
