用ranuni或者surveyselect试试看

%macro crackman(n,seed);
%do i=1 %to &n.;
proc surveyselect data=ex1 out=crackman&i. method = srslursl sys samprate=0.70  seed =&i.*&seed.;
run;
proc reg data=crackman&i.;
model y=x;
run;
%mend crackman;
%crackman(5,50);

你试一下先，有问题再跟帖

n跟seed需要改么？seed是干嘛的？

libname in "D:\ritter\work\logistic";
proc surveyselect data=in.ft_valdevsample1 out=in.ft_valdevsample2 method = srslursl sys samprate=0.70  seed =50;
run;
我用你的方法写了这个 先不用循环，输出一个试试看 但是提示错误
167! samprate=0.70  seed =50;
WARNING 1-322: Assuming the symbol SRS was misspelled as srslursl.
ERROR 22-322: Syntax error, expecting one of the following: ;, CERTAIN, CERTSIZE, DATA, JTPROBS, M,
              MAXSIZE, METHOD, MINSIZE, N, NMAX, NMIN, NOPRINT, OUT, OUTALL, OUTHITS, OUTSEED,
              OUTSIZE, OUTSORT, RATE, REPS, SAMPRATE, SAMPSIZE, SEED, SELECTALL, SORT, SRSALG,
              STATS.
ERROR 202-322: The option or parameter is not recognized and will be ignored.
168  run;

method = srslursl sys
忘了和你说
SRS URS SYS分别是三种方法
你用系统抽样吧
SYS