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.