I am trying to fix this mexjulia example and I cannot figure out what to replace levenberg_marquardt with. In particular, levenberg_marquardt returns a vector of residuals of length m but as far as I can see, all of the Optim.jl 0.9.0 optimization methods require the function to minimize to return a scalar.
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I think Levenberg-Marquardt moved to LsqFit.jl
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This is correct. We had a pretty long deprecation period though. Happy to help if something isn’t working out as expected!
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The deprecation works only if one happens to use the function during the deprecation period and I didn’t. I remember reading about the splitting of the two packages, but I could not find that announcement.