Hello! I've data where all lab results along with the 8 visits , So some subjects were not visits all 8 visits.So I need to retain the previous visit observation when visit is missing..like Data new; Input Id $ visit val1 val2; Datalines; ABC123 1 50 54 ABC123 2 33 33 ABC123 3 21 44 ABC123 4 33 64 ABC121 1 90 34 ABC121 2 32 39 ABC121 3 51 24 ABC122 1 73 83 ABC122 2 10 14 ABC122 3 53 77 ABC124 1 50 54 ABC124 2 32 33 ABC124 3 51 94 ABC124 4 33 44 ; Run; ID ABC121 and ABC122 have only three visits so I need to add 4th visit to those IDs with previous observation values. Could you please help me out how to do this one. Thank you! Regards.. ... View more

Hello! I've a date 11/jul/2012 So I'm trying to convert this date to iso format. I'm running the below program Data new; Set old; DD=put(input(DD,best.),is8601dt.); Run; But I didn't get the out put,and the log shows invalid argument function input. Could you please solve this query.. Thank you! ... View more

Data new; Input id Stat $ ; datalines; 01 yes 02 yes 03 yes 04 yes ; Now If id=yes ,I want to add three values(high, medium,low) per subject . Output should like... Id result 01 High 01 medium 01 low 02 high 02 medium 02 low Could you please help me how to do this one Thank you! ... View more

Hello! could any one please explain the difference between RFXSTDTC and RFSTDTC in demographics domain with an example. Thank you. Regards ... View more