User defined Jacobian in MATLAB's lsqnonlin

StackOverflow https://stackoverflow.com/questions/5935620

Question

When using MATLAB's lsqnonlin function, I am trying to give a user-defined Jacobian matrix, as described in the documentation.

The output of the objective function used in lsqnonlin should be a vector of unsquared values, which, when squared and summed, give the energy. However, should the Jacobian be the partial derivates of the squared or unsquared values?

No correct solution

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