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'''default''' has two meanings in the ASCEND language. | '''default''' has two meanings in the ASCEND language. | ||
Revision as of 09:13, 2 August 2010
default has two meanings in the ASCEND language.
Attribute of ATOMs
Firstly, it is the first-guess value which will be defined for any real-valued ATOM] instances in a MODEL when the model is first instantiated. This first guess is usually chosen in the vicinity of the expected solved value of a variable, such that the iterative solver will converge quickly and reliably. Default values are defined in ATOM statements for each type of atom defined. For example, see models/atoms.a4l.
See also upper_bound, lower_bound, nominal.
METHOD name
Second, 'default is also the name of a METHOD used in automatic recursive initialisation of models.