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. 2011 Apr 1;55(3-3):954–967. doi: 10.1016/j.neuroimage.2010.12.049

Fig. 3.

Fig. 3

Convergence of the Gauss–Newton optimisation. The top panel shows how the objective function is reduced at each iteration, whereas the lower panel shows the norm of the derivatives of the objective function with respect to the model parameters. At the exact solution (either globally or locally optimal), this norm should be zero.