truncation_method

Metric that estimates active subspace size

Specification

• Alias: None

• Arguments: None

• Default: constantine

Child Keywords:

Required/Optional	Description of Group	Dakota Keyword	Dakota Keyword Description
Optional		bing_li	Use the Bing Li “ladle” diagnostic to truncate subspace
Optional		constantine	Use the Constantine diagnostic to truncate subspace
Optional		energy	Truncate the subspace based on eigenvalue energy
Optional		cross_validation	Truncate the subspace to minimize surrogate cross-validation error

Description

Metric that controls how many basis vectors are retained in the active subspace.

Default Behavior

The default is to use the model-active_subspace-truncation_method-constantine diagnostic.

Usage Tips

If the automated subspace identification methods do not yield desirable results, consider using the explicit model-active_subspace-dimension truncation option.