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class_11_14 - Statistical Data Mining ORIE 474 Fall 2007...

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Statistical Data Mining ORIE 474 Fall 2007 Tatiyana Apanasovich 11/14/07 Collaborative Filtering
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BellCore’s MovieRecommender Participants sent email to [email protected] System replied with a list of 500 movies to rate on a 1-10 scale (250 random, 250 popular) Only subset need to be rated New participant P sends in rated movies via email System compares ratings for P to ratings of (a random sample of) previous users Most similar users are used to predict scores for unrated movies (more later) System returns recommendations in an email message.
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Suggested Videos for: John A. Jamus. Your must-see list with predicted ratings: 7.0 "Alien (1979)" 6.5 "Blade Runner" 6.2 "Close Encounters Of The Third Kind (1977)" Your video categories with average ratings: 6.7 "Action/Adventure" 6.5 "Science Fiction/Fantasy" 6.3 "Children/Family" 6.0 "Mystery/Suspense" 5.9 "Comedy" 5.8 "Drama"
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The viewing patterns of 243 viewers were consulted. Patterns of 7 viewers were found to be most similar. Correlation with target viewer:
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This note was uploaded on 12/23/2009 for the course ORIE 474 at Cornell.

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class_11_14 - Statistical Data Mining ORIE 474 Fall 2007...

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