Hi! Thank you for this useful function ! I needed to fit scattered points with noise added, and Gridfit handles that nicely ! Now, I would like to test with different values of smoothness and number of x-y- nodes in order to find the best couple of parameters for my problem. So, I have some questions about the 'smoothness' parameter. You explain in the help that the smoothness parameter is ''normalized'' so a value of '1' may generate reasonable results. I would like to know with respect to which parameter do you normalize the ''smoothness'' value ? If I use either 'gradient ' or ' laplacian' as regularizer, is the smoothness defined in the same way ?