Dakota Reference Manual: metric_scale

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metric_scale

define scaling of statistical metrics when adapting UQ surrogates

## Specification

Alias: none

Argument(s): none

Default: relative

Child Keywords:

| Required/Optional | Description of Group | Dakota Keyword | Dakota Keyword Description
--- | --- | --- | --- | ---
| Required (Choose One) | scale of refinement metric (Group 1) | relative | relative scaling of statistical metrics when adapting UQ surrogates
absolute | use of absolute statistical metrics when adapting UQ surrogates

## Description

When adapting a UQ surrogate model, e.g., by change in response covariance matrix or level mappings, this option controls the use of scaling. The `absolute` option indicates that there is no scaling such that the statistical change is compared directly to the convergence tolerance. The `relative` option indicates that the change is measured relative to the current reference value (which evolves during the refinement), such that the convergence tolerance controls the relative change.

Default Behavior

The default is `relative`.

Expected Output

Usage Tips

Additional Discussion