Feature Engineering

4 Feature Engineering Tips
The Hitchhiker’s Guide to Feature Extraction
* Automatic Feature Creation using featuretools
* Categorical Features: Label/Binary/Hashing and Target/Mean Encoding
* log loss clipping
* Latitude and Longitude techniques
* AutoEncoders
1) using INDICATOR VARIABLES to isolate key information (thresholds, class groupings, special events, multiple features)
2) flagging INTERACTION FEATURES (sum, diff, product, quotients)
3) improved FEATURE REPRESENTATION (time/date, numbers->category maps, sparse class groups, dummy vars)
4) using EXTERNAL DATA (apis, scraping, time series, geocoding, ...
5) ERROR ANALYSIS after initial training