Dakota Reference Manual: pattern_basis

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pattern_basis

Pattern basis selection

## Specification

Alias: none

Argument(s): none

Default: coordinate

Child Keywords:

| Required/Optional | Description of Group | Dakota Keyword | Dakota Keyword Description
--- | --- | --- | --- | ---
| Required (Choose One) | Pattern Basis Type (Group 1) | coordinate | Use coordinate directions as search pattern
simplex | Use a minimal simplex for the search pattern

## Description

The particular form of the search pattern is controlled by the `pattern_basis` specification. If `pattern_basis` is `coordinate` basis, then the pattern search uses a plus and minus offset in each coordinate direction, for a total of 2n function evaluations in the pattern. This case is depicted in Figure 5.3 for three coordinate dimensions.