https://bbs.pinggu.org/thread-7295053-1-1.html
你的提问有如下解答:
- data Age1;
- set Age;
- if _N_ = 1 then do;
- call missing(of _all_);
- output;
- NAME = 'Age(years) (a)';
- output;
- set Age point=_N_;
- call missing(NAME);
- output;
- end;
- else output;
- run;