Package PyDSTool :: Package Toolbox :: Package optimizers :: Package step :: Module marquardt_step :: Class MarquardtStep
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Class MarquardtStep

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object --+
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        MarquardtStep

The simple gradient step

Instance Methods [hide private]
 
__init__(self, **kwargs)
Computes the Marquardt step
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__call__(self, function, point, state)
Computes a gradient step based on a function and a point
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Inherited from object: __delattr__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __str__

Properties [hide private]

Inherited from object: __class__

Method Details [hide private]

__init__(self, **kwargs)
(Constructor)

source code 

Computes the Marquardt step

  • gamma is the initial Marquardt correction factor (gamma = 1e4)
  • c1 is the decreasing factor (c1 = 0.5)
  • c2 is the increasing factor (c2 = 2.)
Overrides: object.__init__