I Build my PCE model using the functionality in UQlab. I would like to ask if it possible to calculate my parameters’ marginal effect with respect to the response. The Marginal effect of a specific parameter represents the variability of the model output to this parameter when other parameters
are kept constant at their average values.
Do you want to compute a number or a univariate function for the marginal effect? If you want a number, maybe you could have a look at the different options for sensitivity analysis in UQLab.
If you want a univariate function, what about defining a function handle evaluating your PCE at the mean values like this: