sas - How do you specify a variable to be binary in SAS?

Question

Suppose we have the following:

 proc optmodel;
     var  x{1..3} <= 1 integer;

I want the variables to be 0 and 1 only. How do I specify this in the above statement?

Answer 1

认为您可以直接指定如下：

proc optmodel;
 var  x{1..3} binary;