MFIT /METHOD

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MFIT /METHOD

          ANNEAL  Simulated annealing technique. This may require a  very  large
            number of function evaluation.
          POWELL  Gradient  using  the  Powell  method (see Press et al. for de-
            tails).
          SIMPLEX Classical Simplex amoeba search
          ROBUST  A combination of Simplex + Slatec, to be used with large  ini-
            tial steps.
          SLATEC  Modified  Levenberg  Marquardt  method with adaptive steps, as
            implement in the Slatec library.

        All methods require a proper choice of initial values and steps. The AN-
        NEAL method is much more robust against poor guesses, but may require 10
        to 100 times more function evaluations than any other.