fmincon optimiser becomes very slow or it gets "stuck" for quite some time at a certain point of the computation.
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I was given this piece of code to optimise an aerofoil. However, i discovered that the fmincon optimiser often gets stuck at certain stage of computation. The value of the first order optimality stays constant at 1.554e+04 and I have no idea how to make this better?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/154896/image.jpeg)
my tolerances are diffminchange 0.05, tolcon 0.05 and tolfun 0.05. I noticed that my first order optimality is often very high. What is actually happening to the fmincon optimiser?
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