Transcription of Classification: Basic Concepts, Decision Trees, and Model ...
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4 Classification: Basic Concepts, Decision Trees, andModel EvaluationClassification, which is the task of assigning objects to one of several predefinedcategories, is a pervasive problem that encompasses many diverse include detecting spam email messages based upon the messageheader and content, categorizing cells as malignant or benign based upon theresults of MRI scans, and classifying galaxies based upon their shapes (seeFigure ).(a) A spiral galaxy.(b) An elliptical of galaxies. The images are from the NASA Chapter 4 ClassificationClassificationmodelInputAt tribute set(x)OutputClass label(y)Figure as the task of mapping an input attribute setxinto its class chapter introduces the Basic concepts of classification, describes someof the
Regression techniques are covered in Appendix D. Definition 4.1 (Classification). Classification is the task of learning a tar-get function f that maps each attribute set x to one of the predefined class labels y. The target function is also known informally as a …
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