Hi there, I am trying to flag duplicate values in my data set.
I have this:
ID | BirthDate |
1 | 12/07/95 |
1 | 12/07/95 |
1 | 12/07/95 |
2 | 12/24/99 |
2 | 12/24/99 |
3 | 07/26/98 |
4 | 09/29/82 |
and I want this:
ID | BirthDate | Recurrent |
1 | 12/07/95 | 1 |
1 | 12/07/95 | 2 |
1 | 12/07/95 | 3 |
2 | 12/24/99 | 1 |
2 | 12/24/99 | 2 |
3 | 07/26/98 | 1 |
4 | 09/29/82 | 1 |
I found the following code in the communities forum but I cannot seem to make it work... Any help is appreciated.
data want;
count=0;
do until (last.BirthDate);
set have;
by ID BirthDate;
if first.BirthDate then count + 1;
end;
if count > 1 then Recurrent=1; else Recurrent=0;
do until (last.BirthDate);
set temp_names;
by ID BirthDate;
output;
end;
run;
data have;
input (ID BirthDate) (:$15.);
cards;
1 12/7/1995
1 12/7/1995
1 12/7/1995
2 12/24/1999
2 12/24/1999
3 7/26/1998
4 9/29/1982
;
data want;
set have;
by id birthdate;
if first.BirthDate then Recurrent=1;
else Recurrent+1;
run;
ID | BirthDate | Recurrent |
---|---|---|
1 | 12/7/1995 | 1 |
1 | 12/7/1995 | 2 |
1 | 12/7/1995 | 3 |
2 | 12/24/1999 | 1 |
2 | 12/24/1999 | 2 |
3 | 7/26/1998 | 1 |
4 | 9/29/1982 | 1 |
data have;
input (ID BirthDate) (:$15.);
cards;
1 12/7/1995
1 12/7/1995
1 12/7/1995
2 12/24/1999
2 12/24/1999
3 7/26/1998
4 9/29/1982
;
data want;
set have;
by id birthdate;
if first.BirthDate then Recurrent=1;
else Recurrent+1;
run;
ID | BirthDate | Recurrent |
---|---|---|
1 | 12/7/1995 | 1 |
1 | 12/7/1995 | 2 |
1 | 12/7/1995 | 3 |
2 | 12/24/1999 | 1 |
2 | 12/24/1999 | 2 |
3 | 7/26/1998 | 1 |
4 | 9/29/1982 | 1 |
Thank you so much. I did not realize it was this simple!
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