I'm a student and taking SAS course with intensive project work. While I was working on SAS proc correlation and proc regression, I tried to drop some variable using the following code and by SAS project variables not appear after I tried this code. How Can I keep them back? data work.my_data;     call streaminit(123);       do i = 1 to 1000;          my_var = rand("Normal", 0, 1);          output;     end;       drop i; run; ... View more