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Dakota Reference Manual
Version 6.15
Explore and Predict with Confidence
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How to scale each linear equality constraint
This keyword is related to the topics:
Alias: none
Argument(s): STRINGLIST
Default: vector values = "none"
Each string in linear_equality_scale_types
indicates the scaling type for each linear equality constraint. They only have effect when the associated method specifies scaling
.
The options are:
'value'
- characteristic value. If this is chosen, then linear_equality_scales must be specified; 'value' is assumed if scales are given without a scale_types
'auto'
- automatic scaling.If a single string is specified it will apply to all linear equality constraints. Otherwise the number of strings specified should be equal to the number of linear equalities.
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 equality 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.