topic Re: Selecting first 3 observations based on conditions in SAS Programming

Selecting first 3 observations based on conditions

thb — Wed, 03 Oct 2018 18:42:02 GMT

Hello,

I have the following data table below. I only want to keep the first 3 observation output for each ID and Measure. Any help would be greatly appreciated. Thank you!

data have;
input ID Measure Date :mmddyy10. Output;
format date mmddyy10.;
datalines;

1 A 010117 1
1 A 020117 2
1 A 030117 3
1 A 060118 1
1 A 070118 2
1 A 080118 3
2 A 010116 1
2 A 020116 2
2 A 030116 3
3 A 010116 1
3 A 020116 2
3 A 030116 3
3 B 010116 1
3 B 020116 2 
3 B 030116 3

data want;
input ID Measure Date :mmddyy10. Output;
format date mmddyy10.;
datalines;

1 A 010117 1
1 A 020117 2
1 A 030117 3
2 A 010116 1
2 A 020116 2
2 A 030116 3
3 A 010116 1
3 A 020116 2
3 A 030116 3
3 B 010116 1
3 B 020116 2
3 B 030116 3

Re: Selecting first 3 observations based on conditions

novinosrin — Wed, 03 Oct 2018 18:49:33 GMT

data have;
input ID Measure $ Date :mmddyy10. Output;
format date mmddyy10.;
datalines;
1 A 010117 1
1 A 020117 2
1 A 030117 3
1 A 060118 1
1 A 070118 2
1 A 080118 3
2 A 010116 1
2 A 020116 2
2 A 030116 3
3 A 010116 1
3 A 020116 2
3 A 030116 3
3 B 010116 1
3 B 020116 2 
3 B 030116 3
;

data want;
do _n_=1 by 1 until( last.measure);
set have;
by id measure;
if _n_<=3 then output;
/*else continue;*/
end;
run;

Re: Selecting first 3 observations based on conditions

thb — Wed, 03 Oct 2018 18:49:46 GMT

THANK YOU so much! It worked perfectly.