Dakota Reference Manual: trend

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trend

This keyword enables the use of deterministic polynomial trend function

## Specification

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) | none | No trend function
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

## Description

Enable the use of a deterministic polynomial trend function whose coefficients are found through regression. The user may choose a constant, linear, or quadratic polynomial.

Default Behavior Defaults to no trend when keyword is absent.