(3)General Data Pre-process 0 òQ Data cleaning Data integration Data reduction Attributes Attributes A2 A3 A126 AI A3 A115 TI E T4 … T1456 T2000 Data transformation -2,32,100,59,48 -0.02.0.32,1.00.0.59.0.48 DATA 30 Copyright 2019 by Xiaoyu Li.Copyright © 2019 by Xiaoyu Li. 30 (3) General Data Pre-process