topic lead in SAS Programming

lead

SAS_inquisitive — Tue, 04 Jul 2017 13:09:22 GMT

Hello,

I want to populate var2 with subsequent record value if the var1 is missing.

data test;
input var1 $ ;
cards;
.
abc
;
run;

data want;
  set test;
  var2=substr(var1,1,1);
run;

Desired output:

var1 var2

. a

abc a

Re: lead

Kurt_Bremser — Tue, 04 Jul 2017 13:22:48 GMT

Merge the dataset with itself, but start one observation later:

data want;
merge
  test
  test (firstobs=2 rename=(var1=var1x))
;
if var1 = ' '
then var2 = substr(var1x,1,1);
else var2 = substr(var1,1,1);
drop var1x;
run;