Most of this material is derived from the text, Han, Kamber and Pei, Chapter 8 and 9, or the corresponding powerpoint slides made available by the publisher. Where a source other than the text or its slides was used for the material, attribution is given. Unless otherwise stated, images are copyright of the publisher, Elsevier.
Here, we will discuss how to evaluate the performance of classifiers. When we have built a model using some learning algorithm or by fitting a statistical distribution, how do we know whether it is any good?
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