Dakota Reference Manual: linear_inequality_scales

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linear_inequality_scales

Characteristic values to scale linear inequalities

## Topics

This keyword is related to the topics:

- linear_constraints

## Specification

Alias: none

Argument(s): REALLIST

Default: vector values = 1 . (no scaling)

## Description

Each real value in `linear_inequality_scales` is a nonzero characteristic value to be used in scaling each constraint. They only have effect when the associated method specifies `scaling`.

This keyword is required for linear_inequality_scale_types of `'value'` and optional for `'auto'`.

If a single real value is specified it will apply to all linear inequality constraints. Otherwise the number of values should be equal to the number of linear inequalities.

Scaling for linear constraints is applied after any continuous variable scaling.

For example, for variable scaling on continuous design variables x:

we have the following system for linear inequality constraints

and user-specified or automatically computed scaling multipliers are appplied to this final transformed system, which accounts for continuous design variable scaling. When automatic scaling is in use for linear constraints they are linearly scaled by a computed characteristic value, but not affinely to [0,1].

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