【求助】SAS百分位数统计的问题，高手请进！

1. data out;
   
2. do i=1 to 100;
   
3. j=ceil(200*(ranuni(0)));
   
4. output;
   
5. end;
   
6. run;
   
7. proc rank data=out out=shen group=4;
   
8. ranks rank;
   
9. var j;
   
10. run;
    
11. proc means data=shen noprint nway ;
    
12. class rank;
    
13. var j;
    
14. output out=liang(drop=_type_ _freq_) mean=mean_rank;
    
15. run;
    
16. proc sort data=shen;
    
17. by rank;
    
18. run;
    
19. data result;
    
20. set shen(drop=mean_rank);
    
21. by rank;
    
22. if first.rank then set liang;
    
23. run;

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