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Attribute Subset Selection
- Another way to reduce dimensionality of data
- Redundant attributes
- Duplicate much or all of the information contained in one or more other attributes
- E.g., purchase price of a product and the amount of sales tax paid
- Irrelevant attributes
- Contain no information that is useful for the data mining task at hand
- E.g., students' ID is often irrelevant to the task of predicting students' GPA
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