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The Apriori Algorithm (Pseudo-Code)

Ck: Candidate itemset of size k

Lk : frequent itemset of size k

L1 = {frequent items};

for (k = 1; Lk !=Ø; k++) do begin

            Ck+1 = candidates generated from Lk;

             for each transaction t in database do

                            increment the count of all candidates in Ck+1 that are contained in t

             Lk+1 = candidates in Ck+1 with min_support


return Uk Lk;

Speaker notes:

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