This won't work since b1+mo12 is missing and hence sum(b1+mo12) is missing too as e in the following shows.

2586 data _null_; 2587 a=4; 2588 b=.; 2589 c=a+b; 2590 d=sum(a,b); 2591 e=sum(a+b); 2592 put c=; 2593 put d=; 2594 put e=; 2595 run;

c=. d=4 e=. NOTE: Missing values were generated as a result of performing an operation on missing values. Each place is given by: (Number of times) at (Line):(Column). 1 at 2589:6 1 at 2591:5 1 at 2591:10 NOTE: DATA statement used (Total process time): real time 0.00 seconds cpu time 0.00 seconds

-----Original Message----- From: SAS(r) Discussion [mailto:SAS-L@LISTSERV.UGA.EDU] On Behalf Of Aspinall, Clifford G Sent: Monday, April 16, 2007 3:09 PM To: SAS-L@LISTSERV.UGA.EDU Subject: Re: question about data step

sum(bl+mo12)

-----Original Message----- From: SAS(r) Discussion [mailto:SAS-L@LISTSERV.UGA.EDU] On Behalf Of Jane Sent: Monday, April 16, 2007 4:03 PM To: SAS-L@LISTSERV.UGA.EDU Subject: question about data step

Hi all

I had a question about data step. I have two variable (bl, mo12). mo12 has some missing variable.

I want to get bl+mo12, if mo12 is missing I just want to consider it as 0 instead of considering bl+mo12 as missing.

how can I do this only use one line command?

Thanks

jane

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