1. Introduction to Data Mining Ch. 2 Data Preprocessing Heon Gyu Lee ( [email_address] ) http://dblab.chungbuk.ac.kr/~hglee DB/Bioinfo., Lab. http://dblab.chungbuk.ac.kr Chungbuk National University

12. Forms of Data Preprocessing

17. Data Cleaning : Regression x y y = x + 1 X1 Y1 Y1’

18. Data Cleaning : Cluster Analysis

28. Data Reduction : Aggregation Standard Deviation of Average Monthly Precipitation Standard Deviation of Average Yearly Precipitation Variation of Precipitation in Australia

39. Data Reduction : Discretization Without Using Class Labels Data Equal interval width Equal frequency K-means

41. Question & Answer