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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