I am thinking to post idea about sas programming and predictive modeling. I will discuss problems arising from working environment. Some of them can be very elementary and some of them can be very advanced. I am thinking to put a number (from 1 to 5) in title to show how easy (1) or how difficult (5) the problem is. The mission is to disclose valuable experience to the public.
I will first post a problem and then wait for several days to post an answer or comments.
Problem:
A sas dataset does not have a key. How to create one ( i.e., how to create a new column to be used as key )?
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