Priors on threshold parameters?

[maxlindmark]

Hi!

I wonder if/how I can put priors on threshold (hockey-stick) parameters.

From ?sdmTMBpriors:

sdmTMBpriors(
  matern_s = pc_matern(range_gt = NA, sigma_lt = NA),
  matern_st = pc_matern(range_gt = NA, sigma_lt = NA),
  phi = halfnormal(NA, NA),
  ar1_rho = normal(NA, NA),
  tweedie_p = normal(NA, NA),
  b = normal(NA, NA),
  sigma_G = halfnormal(NA, NA)
)

I guess there should have been an argument like "b_threshold" or similar. Because while tidy(fit, effects = "fixed") shows the threshold parameters, fit$tmb_params$b_jshows the dimenions b needs to have to not produce the mismatch error error (and this is number of fixed effects - threshold parameters in my case):

Error in `sdmTMB()`:
! The number of 'b' priors does not match the model matrix.
Run `rlang::last_trace()` to see where the error occurred.