You don't have to fix a scale. But your data needs to be consistent. It wouldn't work to have users rate on a 1-5 scale one day, and 1-100 tomorrow (unless you go back and normalize the old data to 1-100).
On Mon, Feb 4, 2013 at 3:56 PM, Zia mel <ziad.kame...@gmail.com> wrote: > Hi , is there a necessity to have a fix rating scale while running > recommendations or it can be dynamic based on the users' data ? > > Many Thanks
