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Implementation of Apriori

  • How to generate candidates?
    • Step 1: self-joining Lk
    • Step 2: pruning
  • Example of Candidate-generation
    • L3={abc, abd, acd, ace, bcd}
    • Self-joining: L3*L3
      • abcd from abc and abd
      • acde from acd and ace
    • Pruning:
      • acde is removed because ade is not in L3
    • C4 = {abcd}

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