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Basic Concepts: Association Rules

 
  • Find all the rules X → Y with minimum support and confidence
    • support, s, probability that a transaction contains X U Y
    • confidence, c, conditional probability that a transaction having X also contains Y

      Let  minsup = 50%, minconf = 50%
      Freq. Pat.: Beer:3, Nuts:3, Diaper:4, Eggs:3, {Beer, Diaper}:3
  • Association rules: (many more!)
    • Beer → Diaper  (60%, 100%)
    • Diaper → Beer  (60%, 75%)

 

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