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18 Apr 2011 Adaptive Robust Numerical Differentiation Numerical derivative of an analytically supplied function, also gradient, Jacobian & Hessian Author: John D'Errico

H John,

This looks great. I'm trying to use the Hessian function to find the Fisher Information Matrix for Max-likelihood. However the Hessian program is choosing parameters which are not allowable in my chosen model. How can I restrict the Hessian algorythmn for permissible parameter values

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