chapter  6
Instance-Based Learning: A Survey
ByCharu C. Aggarwal
Pages 30

Learning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 6.10 Lazy Methods for Diagnostic and Visual Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176 6.11 Conclusions and Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

6.1 Introduction Most classification methods are based on building a model in the training phase, and then using

this model for specific test instances, during the actual classification phase. Thus, the classification process is usually a two-phase approach that is cleanly separated between processing training and test instances. As discussed in the introduction chapter of this book, these two phases are as follows:

• Training Phase: In this phase, a model is constructed from the training instances.