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Skill · Shaping inputs that models loveLive

Feature Engineering

The work that moves the needle more than the model: encoding, scaling, binning, interactions, and leak-free pipelines.

  1. Task 1Encode categoriesEasyTurn ordered text labels into numbers a model can use.~11 min · 1 blanks→
  2. Task 2One-hot encodingEasyFor unordered categories, give each its own 0/1 column.~11 min · 1 blanks→
  3. Task 3Scale numeric featuresEasySqueeze numbers into a fixed [0, 1] range.~11 min · 1 blanks→
  4. Task 4Impute missing valuesMediumFill gaps with a robust statistic so models don't choke.~12 min · 1 blanks→
  5. Task 5Bin continuous valuesMediumTurn a number into meaningful buckets.~12 min · 1 blanks→
  6. Task 6Interaction & polynomialMediumManufacture squared and interaction terms automatically.~13 min · 1 blanks→
  7. Task 7Date featuresMediumCrack a timestamp open into useful parts.~12 min · 1 blanks→
  8. Task 8Text to featuresHardTurn raw sentences into a numeric word-count matrix.~14 min · 1 blanks→
  9. Task 9Select the best featuresHardKeep only the columns that actually carry signal.~14 min · 1 blanks→
  10. Task 10A leak-free pipelineHardApply different transforms to different columns, leak-free.~16 min · 1 blanks→