How can I get an element of a particular index from a set in GAMS?

Question

Suppose I have the set ``codes" in GAMS:

SET    
      codes /aaa, aab, aac, aad, aae/;

How can I then say get the 3rd element (or any element) in the set in GAMS?

Answer 1

Are you looking for the "ord" operator like this?

SET
      codes /aaa, aab, aac, aad, aae/
      selected(codes);

selected(codes) = ord(codes)=3;

Display selected;