the RMSE will vary depending on the range of data. For example if the range of ratings is 0-1 it will be different when it is 1-10 . So my question is that is there a way to say that the predicting rate is X% instead of saying that the RMSE is 1 or 2 ? So I suggested diving the RMSE/range to get a % . Do that make sense ?
On Tue, Jan 15, 2013 at 12:23 PM, Sean Owen <[email protected]> wrote: > You have the definition there already, what are you asking? > On Jan 15, 2013 5:58 PM, "Zia mel" <[email protected]> wrote: > >> Hi again , >> >> When evaluting preferences in recommenders and using >> RMSRecommenderEvaluator, is it RMSE/RMSD >> http://en.wikipedia.org/wiki/Root_mean_square_deviation >> >> If we get a value of 1 or 10 for RMSE what does that really mean ? Can >> we represent RMSE by a % by dividing it on the range of preferences to >> get a % of the error. For example if the RMSE is 1 and range is from >> 0-5 can we say that the error of predicting is 1/5= 20% ? >> >> Thanks >>
