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4 Data Sets

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1. Lenses: Database for fitting contact lenses

2. MONK's Problems: A set of three artificial domains over the same attribute space; Used to test a wide range of induction algorithms

3. Trains: 2 data formats (structured, one-instance-per-line)

4. Car Evaluation: Derived from simple hierarchical decision model, this database may be useful for testing constructive induction and structure discovery methods.