Hi
How I can select values after conditions inside multiple groups.
My data looks like
id day timep results flag
1 1 0 23
1 1 1 43 X
1 1 2 29
1 1 3 14
2 1 0 17
2 1 1 32
2 1 2 54 X
2 1 3 59
How can I select values before X or after X inside the same ID.
For example the wanted output would be like this for before X
id day timep results flag
1 1 0 23
and after X the results should be:
1 1 2 29
1 1 3 14
for id 1.
Here is one way.
data x; input id day timep results flag $; cards;
1 1 0 23 .
1 1 1 43 X
1 1 2 29 .
1 1 3 14 .
2 1 0 17 .
2 1 1 32 .
2 1 2 54 X
2 1 3 59 .
;
proc print;run;
data before;
set x(keep=flag);
if flag = 'X' then do;
f = _n_ - 1;
set x point=f;
output;
end;
run;
proc print; run;
data after;
set x(keep=flag) nobs=n;
if flag = 'X' and _n_ + 1 le n then do;
f = _n_ + 1;
set x point=f;
output;
end;
run;
proc print; run;
data x;
input id day timep results flag $;
cards;
1 1 0 23 .
1 1 1 43 X
1 1 2 29 .
1 1 3 14 .
2 1 0 17 .
2 1 1 32 .
2 1 2 54 X
2 1 3 59 .
;
run;
data before after;
set x;
by id;
retain found;
if first.id then call missing(found);
if flag='X' then found=1;
if not found then output before;
else if flag ne 'X' then output after;
drop found;
run;
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