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ADJUST /METHOD

      ANNEAL  Simulated annealing technique. This may require a  very  large
        number of function evaluation.
      POWELL  Gradient  using  the  Powell  method with the Davidon-Fletcher
        variable metric.
      SIMPLEX Classical Simplex amoeba search
      ROBUST  A combination of Simplex +  Slatec,  to  be  used  with  large
        enough initial steps.
      SLATEC  Modified  Levenberg  Marquardt  method with adaptive steps, as
        implemented in the Slatec (LINPACK) 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.  It is also  dif-
    ficult to control.


Gildas manager 2024-03-28