We presented two new algorithms, Apriori and AprioriTid, for discovering all signicant association
rules between items in a large database of transactions. We compared these algorithms to
the previously known algorithms, the AIS [AIS93b] and SETM [HS93] algorithms. We presented
experimental results, using both synthetic and real-life data, showing that the proposed algorithms
always outperform AIS and SETM. The performance gap increased with the problem size, and
ranged from a factor of three for small problems to more than an order of magnitude for large
problems.
We presented two new algorithms, Apriori and AprioriTid, for discovering all signi cant associationrules between items in a large database of transactions. We compared these algorithms tothe previously known algorithms, the AIS [AIS93b] and SETM [HS93] algorithms. We presentedexperimental results, using both synthetic and real-life data, showing that the proposed algorithmsalways outperform AIS and SETM. The performance gap increased with the problem size, andranged from a factor of three for small problems to more than an order of magnitude for largeproblems.
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