primary_scales
Characteristic values to scale each objective function
Specification
Alias: objective_function_scales
Arguments: REALLIST
Default: 1.0 (no scaling)
Description
Each real value in primary_scales is a nonzero characteristic value
to be used in scaling each objective function. They only have effect
when the associated method specifies scaling.
This keyword is required for
primary_scale_types of <tt>’value’</tt> and
optional for <tt>’log’</tt>. When specified in conjunction with log,
scale values are applied prior to the logarithm, to permit log scaling
of strictly negative response functions.
Length: When specified, primary_scales must have length one of:
One (the single value will be applied to each objective function); or
Number of response groups (
objective_functions), so the number of scalars plus the number of fields when fields are present; orTotal number of response elements, so the number of scalar responses plus the sum of the lengths of the fields.
Usage Tips:
When primary_scales are specified, but not
primary_scale_types, the scaling type is assumed
to be ‘value’ for all primary response functions.
Use scale values of 1.0 to selectively avoid scaling a subset of response functions.
When scaling is active, it is applied to objective functions prior to
any weights and multi-objective sum
formation. See the equations in objective_functions.
See the scaling information under specific methods, e.g.,
method-*-scaling for details on how to use this keyword.
