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Dakota Reference Manual
Version 6.15
Explore and Predict with Confidence
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Set the factor by which a search pattern can be expanded
Alias: none
Argument(s): INTEGER
Default: 5
In general, pattern search methods can expand and contract their step lengths. SCOLIB pattern search methods contract the step length by the value contraction_factor
, and they expand the step length by the value (1/contraction_factor). The expand_after_success
control specifies how many successful objective function improvements must occur with a specific step length prior to expansion of the step length, whereas the no_expansion
flag instructs the algorithm to forgo pattern expansion altogether.