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Data Mining - Stanford University

Chapter 1 data MiningIn this intoductory chapter we begin with the essence of datamining and a dis-cussion of how data Mining is treated by the various disciplines that contributeto this field. We cover Bonferroni s Principle, which is really a warning aboutoverusing the ability to mine data . This chapter is also the place where wesummarize a few useful ideas that are not data Mining but are useful in un-derstanding some important data - Mining concepts. These include the of word importance, behavior of hash functions and indexes, and iden-tities involvinge, the base of natural logarithms. Finally, we give an outlineofthe topics covered in the balance of the What is data Mining ?The most commonly accepted definition of data Mining is thediscovery of models for data . A model, however, can be one of several things.

kets” of small sets of items, as in the market-basket problem that we shall discuss in Chapter 6Frequent Itemsetschapter.6. We look for small sets of items that appear together in many baskets, and these “frequent itemsets” are the characterization of the data that …

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