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Posted 10-21-2015 01:07 PM
(1502 views)
i need to replicate the value of the previos line (_n_ - 1) to line (_n_), could anyone code it.
ex.
data have ;
input n field $;
cards ;
1 y12
2 .
3 .
4 b98
5 .
6 .
7 .
;
run ;
data want;
set have;
n field
1 y12
2 y12
3 h12
4 b98
5 b98
6 b98
7 b98
run;
please, consider that this table (have) cannot be ordered
Thanks
3 REPLIES 3
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Simple retain statement would work.
data want;
set have;
retain field1;
if not missing(field) then field1=field;
run;
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data want;
set have;
retain prevField;
if field ne "" then prevField = field;
if field = "" then field = prevField;
run;
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Here is a solution:
data have;
input n field$;
cards ;
1 y12
2 .
3 .
4 b98
5 .
6 .
7 .
;
data want;
set have;
retain field2;
if not missing(field) then field2 = field;
if missing(field) then field = field2;
drop field2;
run;