Getting started: MIP variables and datastructure

Use set_name

for p in plants, m in markets
    set_name(ship[p, m], "ship_$(p.name)_$(m.name)")
end

It would make sense if we added a name keyword to JuMP, so you could go

@variable(model, ship[p=plants, m=markets], name="$(p.name)_$(m.name)")

(Yes, there is base_name, but that changes ship, not the indexing.)

Edit: Add `name` keyword to macros · Issue #2643 · jump-dev/JuMP.jl · GitHub