Recommender Engines : A Peak into Predictive Analytics

Proposed talk on Predictive Analytics and Recommender Engines

Transcript

1. Recommender Engines
   A Peak into Predictive Analytics
   

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2. Predictive Analytics
   http://giphy.com/gifs/season-6-the-simpsons-6x19-3orieSdZDhn7I6gViw
   

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3. Predictive Analytics
   • Analysis of current and historical facts/data to
   make predictions about the future
   • Traditionally a field of statistics/statistical
   computing.
   • Now encompasses machine learning and data
   mining.
   Current
   Data
   Historical
   Data
   Predict
   Future
   Machine Learning / Statistics
   

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4. Analytical Maturity
   

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5. Analytical Maturity
   

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6. Recommender Engines
   • Class of Information Filtering systems
   • Model user preferences
   • Analyse input data to predict output similar to
   user preferences.
   

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7. Types of RE
   • Collaborative Filters
   • Content Based Filters
   • Hybrid Recommender Engines
   http://i.imgur.com/xlXjtOL.jpg
   

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8. RE: Collaborative Filters
   • Also termed as User Based CF
   • Users with similar behaviours and/or
   attributes have similar preferences
   

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9. RE : Content Based
   • Also termed as Item Based CD+F
   • Item attributes along with user personas are
   utilized to build preference models
   

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10. RE : Hybrid
    • Best of both worlds
    • Can be modelled using User Based CF and
    Item Based CF in different configurations.
    • Less prone to issues of sparsity and cold start.
    

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11. Quick and Dirty RE
    • Matrix Factorization based Recommender
    Engine
    

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12. Quick and Dirty RE
    • Code and Results
    

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13. Applications
    • Jobs you may be interested in
    • Who to follow
    • Other movies you might enjoy
    

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14. Issues
    • Cold Start Problem
    • Sparsity Problem
    • Filter Bubble
    http://ebiquity.umbc.edu/blogger/2015/06/08/hot-stuff-at-coldstart/
    

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15. References
    • R Machine Learning by Example (link)
    • Gartner Analytics Maturity Model (link)
    

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16. THANK YOU
    Raghav Bali (@rghv_bali)
    http://xkcd.org/892/
    

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