The Huber criterion for data fitting is a combination of thel 1 and thel 2 criteria which is robust in the sense that the influence of wild data points can be reduced. We present a trust region and a Marquardt algorithm for Huber estimation in the case where the functions used in the fit are non-linear. It is demonstrated that the algorithms converge under the usual conditions.
Godkänd; 1989; 20070205 (evan)