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File: Feature Engineering Pdf 86561 | 18 Feat
feature engineering l eon bottou cos 424 4 22 2010 summary summary i the importance of features ii feature relevance iii selecting features iv learning features l eon bottou 2 ...

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            Feature engineering
                  L´eon Bottou
               COS 424 – 4/22/2010
         Summary
         Summary
            I.   The importance of features
           II.   Feature relevance
          III.   Selecting features
          IV. Learning features
         L´eon Bottou                                         2/29                             COS 424 – 4/22/2010
     I. The importance of features
     L´eon Bottou             3/29            COS 424 – 4/22/2010
      Simple linear models
      People like simple linear models with convex loss functions
      – Training has a unique solution.
      – Easy to analyze and easy to debug.
      Which basis functions Φ?
      – Also called the features.
        Many basis functions
        – Poor testing performance.
        Few basis functions
        – Poor training performance, in general.
        – Good training performance if we pick the right ones.
        – The testing performance is then good as well.
      L´eon Bottou                     4/29                 COS 424 – 4/22/2010
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...Feature engineering l eon bottou cos summary i the importance of features ii relevance iii selecting iv learning simple linear models people like with convex loss functions training has a unique solution easy to analyze and debug which basis also called many poor testing performance few in general good if we pick right ones is then as well...

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