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...
