primary_scale_types
How to scale each objective function
Specification
Alias: objective_function_scale_types
Arguments: STRINGLIST
Default: no scaling
Description
Each string in primary_scale_types
indicates the scaling type for
each objective function. They only have effect when the associated
method specifies scaling
.
The options are:
<tt>’value’</tt> - characteristic value by which response functions will be divided. If this is chosen, then responses-objective_functions-primary_scales must also be specified; ‘value’ is assumed if scales are given without
scale_types
<tt>’log’</tt> - logarithmic scaling (can be used together with responses-objective_functions-primary_scales, which can be helpfully used to negate values prior to log transformation)
(Automatic scaling is disallowed due to lack of bounds or targets for primary responses.)
If a single string is specified it will apply to all
objective_functions. Otherwise the length of primary_scale_types
must have length equal to responses-objective_functions. Thus,
when scalar and/or field responses are specified, the number of
primary_scale_types
must equal the number of scalars plus the number
of fields, not the total elements in the fields.
Usage Tips:
When scaling is active, it is applied to objective functions prior to any responses-objective_functions-weights and multi-objective sum formation.
See the scaling information under specific methods, e.g.,
method-*-scaling
for details on how to use this keyword.