Hello. I understand from the documentation of ForwardDiff.jl that the package uses a Tag type parameter to avoid something called ‘perturbation confusion’: http://www.juliadiff.org/ForwardDiff.jl/stable/dev/how_it_works.html From experimenting I have noticed that the Tag parameter is somehow used…

[image] skarp: fixed (and hence estimated) parameters could be selected at run time (without modification of the objective function) You could use a closure/callable that mixed fixed and known arguments into a vector. This is a more general and probably easier solution than somehow rigging Fo…

Help with Tag type parameter in ForwardDiff.jl (+ Optim.jl)

Specific Domains Optimization (Mathematical)

Tamas_Papp October 30, 2018, 2:12pm 2

Please quote your code with backticks:

If you just want to optimize some variables, I would use a closure. Eg

f(a, b, c) = a^2 + b^2 + c^2
fixab(a, b) = c -> f(a, b, c)

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