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Date:         Tue, 29 Dec 2009 13:59:25 -0800
Reply-To:     Patrick <patrick.matter@GMX.CH>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Patrick <patrick.matter@GMX.CH>
Subject:      Re: Replace missing address with most recent address? Thank you!
Comments: To:
Content-Type: text/plain; charset=ISO-8859-1

Hi Nancy

Not sure if this is what you're after:

data have; infile datalines truncover dsd dlm=' '; input @1 ID @3 address $ @8 date:ddmmyy.; format date date9.; datalines; 1 01/01/2009 1 abcd 01/05/2009 1 cdef 01/06/2009 2 defg 01/02/2009 2 adbc 01/05/2009 2 01/03/2009 ; proc sort data=have; by id date; run;

data want; set have; by id; retain lagaddress; lagaddress=lag(address); if then address2=address; else if not then do; address2=coalescec(address,lagaddress); end; run; proc print data=want; run;

HTH Patrick

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