Syntax
>>>> SENSITIVITY: (-)rsens
Parent Command
>>> SELECT
Subcommand
-
Description
This command defines one of the criteria used for automatic parameter selection. It examines the potential of a parameter to reduce the objective function based on the sensitivity coefficient:
dD = |delta S|where |delta S| is the change of the objective function if the parameter is perturbed by a certain, small value (see command >>> PERTURB).
The sensitivities are normalized to the maximum sensitivity:
omega = dD / dDmaxThose parameters with an omega-value larger than |rsens|, i.e., the most sensitive parameters, are selected. Parameters which are unlikely to significantly reduce the objective function are (temporarily) excluded from the optimization process. If a negative value is given for rsens, the selection criterion is relaxed with each iteration k, and reaches zero for the last iteration max_iter, i.e., all parameters specified in block > PARAMETER are selected for the final step.
rsensk = |rsens| (1 – k/max_iter)Example
> COMPUTATION
>> OPTION
>>> SELECT parameter automatically every
>>>> : 3 ITERATIONS
>>>> based on the SENSITIVITY criterion with rsens : -0.10
<<<<
<<<
<<
See Also
>>>> ITERATION (s) | >>>> CORRELATION