Auto-scale / Scaling for optimiser and Parameter Estimation

Hi

I have a hard time understanding the purpose of the Auto-Scaling for the Parameter Estimation experiment.

This is what is written in the User Guide:
- Scaling: Scale factor to be used by the optimiser
– Auto-scale: If switched on, Scaling is set to the Initial Value auto-
matically (in order to scale to 1).

I am trying to use the Parameter Estimation, but don't know if I should turn on auto scaling or not. See screen shot for illustration.

Correct: the scaling factor is set to the initial value of the parameter. This ensures that two parameters that vary over different ranges (e.g. 0-1 vs. 0-1000) will be equally affected by the optimiser at every integration step.

In your screenshot though, it seems that the lower and upper bounds are disabled: this is because you have not set the "[b]constrained optimisation[/b]" option in the Solver tab page of the Analysis Properties.

Thank you :)