Data Mining Classification: Basic Concepts and Techniques

data Mining Classification: Basic Concepts and TechniquesLecture Notes for Chapter 3 Introduction to data Mining , 2ndEditionbyTan, Steinbach, Karpatne, Kumar2/1/2021 Introduction to data Mining , 2ndEdition1 Classification: DefinitionlGiven a collection of records (training set ) Each record is by characterized by a tuple (x,y), where x is the attribute set and y is the class label x: attribute, predictor, independent variable, input y: class, response, dependent variable, outputlTask: Learn a model that maps each attribute set x into one of the predefined class labels y2/1/2021 Introduction to data Mining , 2ndEdition212 Examples of Classification TaskTa s kAttribute set, xClass label, yCategorizing email messagesFeatures extracted from email message header and contentspam or non-spamIdentifying tumor cellsFeatures extracted from x-rays or MRI scansmalignant or benign cellsCataloging galaxiesFeatures extracted from telescope imagesElliptical, spiral, or irregular-shaped galaxies2/1/2021 Introduction to data Mining , 2ndEdition3 General Approach for Building Classification Model2/1/2021 Introduction to data Mining , 2ndEdition434 Classification Techniques Base Classifiers Decision Tree based Methods Rule-based Methods Nearest-neighbor Na ve Bayes and

2/1/2021 Introduction to Data Mining, 2nd Edition 23 Test Condition for Ordinal Attributes l Multi-way split: – Use as many partitions as distinct values l Binary split: – Divides values into two subsets – Preserve order property among attribute values This grouping violates order property 2/1/2021 Introduction to Data Mining, 2nd Edition ...

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