When I do optimization calculations with the Optim package, an error occurred. The type of A1,A2,A3,A4 is ::Array{Complex{Float64},2}. I don’t know how to solve it. Is there a way to make optimize() support this type?Or what data type can replace this type and serve as optimize()? [image]

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If anyone else finds this, I encountered this issue when u0 was (erroneously) set to Vector{Vector}. If someone finds the time, it would be great to implement a more descriptive error message, if possible.

Can you be a little more specific？

MWE: using Optimization, OptimizationOptimJL my_func(x, p) = x[1]^2 + x[2]^2 my_grad!(G, x, p) = begin G[1] = 2*x[1] G[2] = 2*x[2] end of = OptimizationFunction(my_func; grad=my_grad!) op = OptimizationProblem(of, [[1.], [1.]], ()) solve(op, LBFGS()) yields ERROR: MethodError: no method …

Optim: MethodError: no method matching zero

Specific Domains Optimization (Mathematical)

Tamas_Papp August 18, 2020, 2:08pm 2

Please don’t post screenshots, and include an MWE.

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Optim: MethodError: no method matching zero

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