请教如何做有返回的和无返回的随机抽样？

shiyiming

T Y!

shiyiming

[code:1qpmoxvr]

data ads;
do i =1 to 100;
   output;
end;
run;
/* simple random sampling */
proc surveyselect data=ads
      method=srs
          sampsize=10
          seed=12345
          out=bds;
          id _all_;
run;
/* unrestricted random sampling */
proc surveyselect data=ads
      method=urs
          sampsize=10
          seed=12345
          out=cds;
          id _all_;
run;

[/code:1qpmoxvr]