Dakota Reference Manual  Version 6.4
Large-Scale Engineering Optimization and Uncertainty Analysis
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trend


Choose a trend function for a Gaussian process surrogate

Specification

Alias: none

Argument(s): none

Default: reduced_quadratic

Required/Optional Description of Group Dakota Keyword Dakota Keyword Description
Required
(Choose One)
Group 1 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.