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ermutuxia 发表于 2014-10-20 08:41 gen educat=. replace educat=1 if edu=4 & edu=7 & edu=10 & edu=13 & edu!=.
nnnail 发表于 2014-10-20 10:02 下更简洁: recode edu (0/=1) (4/6=2) (7/9=3) (10/12=4) (13/100=., gen (educat)