Thank you so much guys for discussing the problem of mine. I am getting the recommendations now! You mentioned something about improving the performance in one of the mails.
On Wed, Jul 15, 2009 at 5:36 PM, Thomas Rewig <[email protected]> wrote: > In principle your code works (I tested it), I just think your Testdata > isn't good or so realistic because it is not much and worse distributed - if > you delete all 0.1 Items - ... but that is only my assumption. > > If you need some working testdata you can use that data I used as I started > with taste and want to know how it works: > > User1,Item1,5 > User1,Item2,4 > User1,Item4,2 > User2,Item2,3 > User2,Item3,2 > User3,Item2,4 > User3,Item3,3 > User3,Item4,2 > User4,Item1,1 > User4,Item2,1 > User4,Item3,1 > User4,Item4,1 > > You can compute it (For User 1-3 there is a recommendation, for User 4 > naturaly not because all Items are set) > and than you can calculate the stuff manually or debug it and understand > like taste is working. > > Perhaps this helps you a little bit. > > regards > Thomas > > Laya Patwa schrieb: > > OK... but i am getting recommendations for this data file! >> And i also tried the other data file after removing some of the items but >> the recommendation list is still empty. Can you please have a look at it >> that you have the code and the data now. >> >> On Wed, Jul 15, 2009 at 2:52 PM, Sean Owen <[email protected]> wrote: >> >> >> >>> I have them now. Yes, again Thomas's analysis is correct about why >>> there are no recommendations from the .txt file. See the previous >>> messages about what to do. >>> >>> The other data file has a different issue. All the ratings are the >>> same. Correlation-based similarity metrics will not work as they >>> cannot define a similarity in such a case (correlation is undefined). >>> It will be unable to give recommendations as a result. You need to try >>> a different metric like TanimotoCoefficientSimilarity. >>> >>> If that works well, there is a way to make this a lot faster. We can >>> discuss it next. >>> >>> On Wed, Jul 15, 2009 at 1:48 PM, Laya Patwa<[email protected]> >>> wrote: >>> >>> >>>> There is a problem in the mailing system I guess. I am sending 1 file in >>>> >>>> >>> 1 >>> >>> >>>> mail. This has the code file. >>>> >>>> On Wed, Jul 15, 2009 at 2:15 PM, Sean Owen <[email protected]> wrote: >>>> >>>> >>>>> There is still only one text file attached. But anyway I believe Thomas >>>>> has >>>>> identified the problem. >>>>> >>>>> On Jul 15, 2009 1:03 PM, "Laya Patwa" <[email protected]> wrote: >>>>> >>>>> You did not get the code? But I sent it. Anyways please find 3 files >>>>> attached with this mail containing the code and the 2 data files. >>>>> My apologies for the mistake. >>>>> >>>>> On Wed, Jul 15, 2009 at 1:57 PM, Sean Owen <[email protected]> wrote: > >>>>> Thomas is right, you have... >>>>> >>>>> >>>> >>>> >>> >> >> >
