AN INTRODUCTION TO DECISION TREES. Prepared for: CIS595 Knowledge Discovery and Data Mining Professor Vasileios Megalooikonomou. Presented by: Thomas Mahoney. Learning Systems. Learning systems consider Solved cases - cases assigned to a class
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Prepared for:CIS595 Knowledge Discovery and Data MiningProfessor Vasileios Megalooikonomou
Measures of impurity or its inverse, goodness reduce impurity or degree of randomness at each node popular measures include:
- pj log pj
1 - p2j
(TL /n) * (TR /n) * (Li TL - Ri/ TR)2
Sum of Variances