Dakota Reference Manual  Version 6.12
Explore and Predict with Confidence
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scale_types


How to scale each nonlinear constraint

Specification

Alias: nonlinear_equality_scale_types

Argument(s): STRINGLIST

Default: no scaling

Description

Each string in scale_types indicates the scaling type for each nonlinear inequality (equality) constraint. They only have effect when the associated method specifies scaling.

The options are:

  • 'value' - characteristic value by which nonlinear constraint values will be divided. If this is chosen, then scales must also be specified; 'value' is assumed if scales are given without scale_types
  • 'auto' - automatic scaling based on bounds (inequalities) or targets (equalities)
  • 'log' - logarithmic scaling (can be used together with scales, which can be helpfully used to negate values prior to log transformation)

If a single string is specified it will apply to all of the nonlinear inequality (equality) constraints. Otherwise a string must be specified for each nonlinear inequality (equality) constraint.

Usage Tips:

See the scaling information under specific methods, e.g., method-*-scaling for details on how to use this keyword.