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


Selects free-form tabular file format for experiment data

Topics

This keyword is related to the topics:

Specification

Alias: none

Argument(s): none

Default: annotated format

Description

A freeform tabular file is whitespace-separated text file with no leading header row and no leading columns. For experiment data files, each row contains data for configuration variables, observatiions, and/or observation errors, depending on context.

Default Behavior

By default, Dakota imports tabular experiment data files in annotated format. Specify freeform to instead select this format.

Usage Tips

  • Prior to October 2011, calibration and surrogate data files were in free-form format. They now default to annotated format, though freeform remains an option.
  • When importing tabular data, a warning will be generated if a specific number of data are expected, but extra is found and an error generated when there is insufficient data.

Examples

Import a free-form experimental data file containing raw experiment data in a calibration study

responses
  ...
  scalar_data_file 'shock_experiment.dat'
    freeform

Example data file with two measured quantities, three experiments:

    18.23       83.21
    34.14       93.24
    22.41       88.92