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Tips:Creating a flag avoiding the If ... Then Structure
When building binary flags in a SAS DATA Step you can avoid the IF-THEN/ELSE structure such as:
IF MIN(x , y) GT 4 THEN flag = 1 ; ELSE flag = 0 ;
by using alternate statement forms:
flag = MIN(x , y) GT 4 ;
flag = IFN(MIN(x , y) GT 4 , 1 , 0) ;