trend

Choose a trend function for a Gaussian process surrogate

Specification

  • Alias: None

  • Arguments: None

  • Default: reduced_quadratic

Child Keywords:

Required/Optional

Description of Group

Dakota Keyword

Dakota Keyword Description

Required (Choose One)

Trend Order

constant

Constant trend function

linear

Use a linear polynomial or trend function

reduced_quadratic

Quadratic polynomials - main effects only

Description

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.