My apologies for not making my problem clearer. Suppose that I would like to perform logistic regression on some variables in a data set. Ideally I would like to avoid the brute force method of typing each variable individually. I am following the method described in the following blog post: https://blogs.sas.com/content/iml/2017/02/13/run-1000-regressions.html. Now, the variables which I am considering do not have the convenient names x1,x2,..,xk as in the blog post, they have names like 'aar', 'bar', 'car'... ect. Suppose, for example, I would like to drop the first 5 variables without explicitly writing a drop statement identifying the names of these variables. Instead, I would prefer to write something in the spirit of "drop x1-x5" as the position the variable in the list is what is of interest to me. Moreover, I would also prefer to not have to explicitly type in the explicit name of the variables when defining the array. I would like to take the variables in the data set and feed them into an array or even a copy of the original data set with the variables renamed to x1 to xk, where k is the number of variables. ... View more