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Collaborative Filtering in iCAMP Max Welling Professor of Computer Science & Statistics.

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Presentation on theme: "Collaborative Filtering in iCAMP Max Welling Professor of Computer Science & Statistics."— Presentation transcript:

1 Collaborative Filtering in iCAMP Max Welling Professor of Computer Science & Statistics

2 Example I: Movie Recommendation http://www.netflix.com/RecommendationsHome?lnkctr=mh2rh&lnkce=sntRc

3 Example II: Book Recommendation http://www.amazon.com/Data-Mining-Practical-Techniques-Management/dp/0120884070/ref=sr_1_1?ie=UTF8&s=books&qid=1273092289&sr=1-1

4 Example III: Internet Search http://www.google.com/search?hl=en&client=firefox-a&hs=gSR&rls=org.mozilla%3Aen-US%3Aofficial&q=max+welling&aq=f&aqi=g2g-m1&aql=&oq=&gs_rfaihttp://www.google.com/search?hl=en&client=firefox-a&hs=gSR&rls=org.mozilla%3Aen-US%3Aofficial&q=max+welling&aq=f&aqi=g2g-m1&aql=&oq=&gs_rfai=

5 Back to The Movies: Data movies (+/- 17,770) users (+/- 240,000) total of +/- 400,000,000 nonzero entries (99% sparse) 4

6 Demo Matlab movies (+/- 17,770) users (+/- 240,000) total of +/- 400,000,000 nonzero entries (99% sparse) users (+/- 240,000) movies (+/- 17,770) x K K “K” is the number of factors, or topics.

7 Conclusion We will implement a number of collaborative filtering algorithms in matlab. You will learn: Clustering; Matrix factorization & Principal Components Analysis; Regression; Classification: naive Bayes classifier, decision trees, neural networks We will work with real world data from netflix, stock- portfolio management, and more. But most of all: this will be fun!

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