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


String-valued discrete design set variables

Topics

This keyword is related to the topics:

Specification

Alias: none

Argument(s): INTEGER

Default: no discrete design set string variables

Required/Optional Description of Group Dakota Keyword Dakota Keyword Description
Optional elements_per_variable

Number of admissible elements for each set variable

Required elements

The permissible values for each discrete variable

Optional adjacency_matrix

1-0 matrix defining which categorical variable levels are related.

Optional initial_point

Initial values

Optional descriptors

Labels for the variables

Description

Discrete design variables whose values come from a specified set of admissible strings. The details of how to specify this discrete variable are located on the discrete_variables page. Each string element value must be quoted and may contain alphanumeric, dash, underscore, and colon. White space, quote characters, and backslash/metacharacters are not permitted.

Examples

Two string variables whose values will be selected from the set of provided elements. The first variable, 'linear solver', takes on values from a set of three possible elements and the second variable, 'mesh_file', from a set of two possible elements.

discrete_design_set
  string 2
    descriptors           'linear_solver'  'mesh_file' 
    elements_per_variable 3                2
    elements              'cg' 'gmres' 'direct' 
                          'mesh64.exo' 'mesh128.exo'