Dakota Reference Manual: expand_after_success

| Dakota Reference Manual Version 6.15 Explore and Predict with Confidence

- Main Page
- Related Pages

All Pages
expand_after_success

Set the factor by which a search pattern can be expanded

## Specification

Alias: none

Argument(s): INTEGER

Default: 5

## Description

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.