Hello, how would I keep the first two observations conditioned upon it being the first observation of 2 variables?
For example, I have:
ID Year Month Time
1 95 1 1
1 95 1 2
1 95 1 3
1 95 2 1
1 95 2 2
1 95 2 3
1 95 2 4
1 96 3 1
1 96 3 2
1 96 3 3
And need:
ID Year Month Time
1 95 1 1
1 95 1 2
1 95 2 1
1 95 2 2
1 96 3 1
1 96 3 2
I've found how this can be achieved conditional upon the first 2 observations of one variable:
data top2(drop=count);
set groups;
by group descending amount;
if first.group then count=0;
count+1;
if count le 2 then output;
run;
But I can't seem to find out how to do it conditioned upon the first 2 observations of 2 variables. I've tried adding a second first.var, but this doesn't seem to work.
I'm using SAS Studio. Thank you.
Your code looks good . just change a little thing.
data top2(drop=count);
set groups;
by ID Year Month;
if first.Month then count=0;
count+1;
if count le 2 then output;
run;
Your code looks good . just change a little thing.
data top2(drop=count);
set groups;
by ID Year Month;
if first.Month then count=0;
count+1;
if count le 2 then output;
run;
You may also try the proc sql method
proc sort data=have;
by id year month time;
run;
proc sql;
create table test(where=(s<=2)) as select *, (monotonic()-min(monotonic())+1) as s from have
group by id,year,month
order by id, year, month,time ;
quit;
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