在SAS中循环字符值 [英] looping over character values in SAS

问题描述

在 Stata 中，您可以使用 foreach 命令遍历字符值列表.到目前为止，我一直在尝试在 SAS 中做同样的事情，但无济于事.我正在尝试对字符列的所有值运行一系列数据和 proc 语句.我尝试了以下方法:

In Stata you can loop over a list of character values with the foreach command. I've been trying to do the same in SAS to no avail so far. I'm trying to run a series of data and proc statements over all the values of character column. I tried with the following:

%let mylist = a b c; * These are all the values of a column called "code";

data mydata_@mylist; * Each element creates a new table;       
   set mydata;   
   where code=&mylist; 
   run;

我做错了什么或错过了什么?

What am I doing wrong or missing?

提前致谢，

马蒂亚斯

推荐答案

试试这个:

%macro loopit(mylist);
   %let n = %sysfunc(countw(&mylist));
   %do I=1 %to &n;
      %let val = %scan(&mylist,&I);

      data mydata_&val;
         set mydata;
         where code = "&val";
      run;
   %end;
%mend;

%let list=a b c;
%loopit(&list);

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