Dakota Reference Manual: export_corrected_variance_file

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export_corrected_variance_file

Output file for prediction variance calculations

## Specification

Alias: none

Argument(s): STRING

Default: corrected model variance export to default filename

Child Keywords:

| Required/Optional | Description of Group | Dakota Keyword | Dakota Keyword Description
--- | --- | --- | --- | ---
| Optional (Choose One) | Tabular Format (Group 1) | custom_annotated | Selects custom-annotated tabular file format
annotated | Selects annotated tabular file format
freeform | Selects freeform file format

## Description

Enables the user to specify the name and format of the file to which corrected model variance information is output. The file will contain the values of the variances computed at those points specified with `num_predictions`, `prediction_configs`, or `import_prediction_configs`.

For scalar responses, the prediction variance for each observable is calculated according to

Here, is the (co)variance calculated from the Gaussian process or polynomial regression model, details of which can be found in the Dakota User's and Theory Manuals. If experimental variance information is provided for the calibration, the maximum variance found for the observable is used as . For more details, see the Dakota User's and Theory Manuals. For field responses, the variance of the discrepancy model alone is output to this file.

Default Behavior

If `export_corrected_variance_file` is not specified, information will be automatically output to `dakota_discrepancy_variance_tabular.dat`.

Usage Tips

Dakota exports tabular data in one of three formats:

- `annotated` (default)
- `custom_annotated`
- `freeform`