Question

My dataset is:

ID     AGE

1      65
1      66
1      67
1      68
1      69
1      70
1      71
2      70
2      71
2      72
3      68
3      69
3      70

 [...]

My (basic) question is: which is the most direct way for obtaining a dataset with ID records starting with 65 <= AGE <= 68? (in the above example I would like to get the first 7 rows and the last three). Thanks!

Answer 1

data input_dataset;
input ID     AGE;
cards;
1      65
1      66
1      67
1      68
1      69
1      70
1      71
2      70
2      71
2      72
;
run;

proc sort data=input_dataset out=sorted;
by ID;
run;

data work.first_age65to68;
  set sorted;
  retain keepit 0;
  by ID;
  if first.ID then do;
      if AGE ge 65 and AGE le 68 then keepit=1;
      else keepit=0;
  end;
  if keepit;
  drop keepit;
run;