derivatives() should ignore random effect smooths

[garincle]

Hello, when using the derivative function I have got the following error:

Error in Summary.factor(c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L,  : 
  ‘min’ not meaningful for factors

please see:
https://stats.stackexchange.com/questions/573346/gam-statistically-comparing-fit-when-changing-covariates-in-gratia-r/574052#574052

for a detail description of the error,
let me know if you need more information,

Thank you again Gavin!

[gavinsimpson]

derivatives() doesn't know how to handle random effect smooths nor know to ignore them. Use the term argument to derivatives() to select the smooth you want derivatives for.

[garincle]

it works perfectly, thank you!