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Dakota Reference Manual
Version 6.16
Explore and Predict with Confidence
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Choose a trend function for a Gaussian process surrogate
Alias: none
Argument(s): none
Default: reduced_quadratic
Child Keywords:
| Required/Optional | Description of Group | Dakota Keyword | Dakota Keyword Description | |
|---|---|---|---|---|
| Required (Choose One) | Trend Order (Group 1) | constant | Constant trend function | |
| linear | Use a linear polynomial or trend function | |||
| reduced_quadratic | Quadratic polynomials - main effects only | |||
| quadratic | Use a quadratic polynomial or trend function |
The only trend functions that are currently supported are polynomials.
The trend function is selected using the trend keyword, with options constant, linear, or reduced_quadratic. The reduced_quadratic trend function includes the main effects, but not mixed/interaction terms. The Surfpack GP (See surfpack) has the additional option of (a full) quadratic.