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From "Martin, Nick" <NiMar...@pssd.com>
Subject RE: Seeing already purchased items in recommender output (running 0.7)
Date Thu, 14 Nov 2013 15:03:44 GMT
Update...--filterFile remedied it but I was operating under the impression a filterFile wasn't
exactly required. 

-----Original Message-----
From: Martin, Nick [mailto:NiMartin@pssd.com] 
Sent: Wednesday, November 13, 2013 4:27 PM
To: user@mahout.apache.org
Subject: RE: Seeing already purchased items in recommender output (running 0.7)

https://drive.google.com/folderview?id=0B7c8ZMblZvRVUmFPeGlIdDJUV28&usp=sharing

Figured it might help if I attach the input/output in case anyone wants to have a look/run
a test. 

If you look at UserID 16240507 they purchased ItemID 1521 (rec_input.csv) and the recommendation
output gives ItemID 1521 as a recommendation (rec_out.txt)


-----Original Message-----
From: Martin, Nick [mailto:NiMartin@pssd.com] 
Sent: Wednesday, November 13, 2013 1:43 PM
To: user@mahout.apache.org
Subject: Seeing already purchased items in recommender output (running 0.7)

Hi all,

I'm running > mahout recommenditembased -s SIMILARITY_EUCLIDEAN_DISTANCE -i /user/myname/somedir/Input/minm.csv
-o /user/nyname/somedir/Output/

My input is the standard format: userid,itemid,pref but I found a customer item recommendation
for something a customer already purchased.

Saw this: http://stackoverflow.com/questions/13822455/apache-mahout-distributed-recommender-recommends-already-rated-items
but it looked fairly old.

Am I hitting a known bug I just haven't stumbled across yet?



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