Is it possible to define a model via cplex where all the variables are binary like @variable(model, a, Bin), and run this model, then without any manual modification change all varaibles to nonnegative and run it again?
I have a long lits of variables, all binary, at some points I need to relax the binary assumption and run the relaxation but I don’t want to change the code line by line and run the relaxation then again change it binary and repeat the cycle. Is there any automatic command for that?