I have to solve a problem with permutations. The function takes vector a with n elements as a parameter. I declare b as @variable - there should be the permutation 1:n that gives the best result after finding the solution of a problem.
The error appears when I want to create @constraint. I have to use a[b[1]], so it takes the first element from vector which is a variable. It gives my error, that I can't use type VariableRef as a index of an array. But how can I get around this when I have to use it?
Julia JuMP - array index which is an index of another array
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1 Answers
I sounds as if you have two optimisation problems one of which is an integer programming problem. You might think about separating the two.
(Sorry for not writing a comment, my reputation is still too low ;-) )
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