如何在 SAS 的数据集中循环不同的 where 语句

How can I loop different where statements in the dataset in SAS

我有多个变量的条件 where 语句,例如:

where 1<ColA<3;

where 4<ColB<6;

where 2<ColC<6;
.....
where 5<ColN<8;

我想根据 where 语句对每个数据集进行子集化,例如:

data newds1;
set original;
where 1<ColA<3;
run;

data newds2;
set original;
where 4<ColB<6;
run;

.....

data newdsn;
set original;
where 5<ColN<8;
run;

如何在 SAS 中循环执行此操作?

创建一个宏来为您执行循环。您可以 pipe-separate 所有的 where 语句并循环遍历每个语句。

%macro subset(data=, conditions=, out=);
    %let n = %sysfunc(countw(&conditions., |) );

    %do i = 1 %to &n.;
        %let where = %sysfunc(scan(&conditions., &i., |) );

        data &out.&i.;
            set &data.;
            where &where.;
        run;
    %end;
%mend;

%subset(data=original, conditions=1<ColA<3 | 4<ColB<6 | 2<ColC<6, out=newds);