Illustrating Classification Task

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Presentation transcript:

Illustrating Classification Task

Example of a Decision Tree categorical continuous class Splitting Attributes Refund Yes No NO MarSt Single, Divorced Married TaxInc NO < 80K > 80K NO YES Training Data Model: Decision Tree

Another Example of Decision Tree categorical categorical continuous class MarSt Single, Divorced Married NO Refund No Yes NO TaxInc < 80K > 80K NO YES There could be more than one tree that fits the same data!

Decision Tree Classification Task

Apply Model to Test Data Start from the root of tree. Refund MarSt TaxInc YES NO Yes No Married Single, Divorced < 80K > 80K

Apply Model to Test Data Refund MarSt TaxInc YES NO Yes No Married Single, Divorced < 80K > 80K

Apply Model to Test Data Refund Yes No NO MarSt Single, Divorced Married TaxInc NO < 80K > 80K NO YES

Apply Model to Test Data Refund Yes No NO MarSt Single, Divorced Married TaxInc NO < 80K > 80K NO YES

Apply Model to Test Data Refund Yes No NO MarSt Single, Divorced Married TaxInc NO < 80K > 80K NO YES

Apply Model to Test Data Refund Yes No NO MarSt Married Assign Cheat to “No” Single, Divorced TaxInc NO < 80K > 80K NO YES

Decision Tree Classification Task