Calculate Item Information Function

Usage

item_info(x, ...)

Arguments

x: An object of class RTMB_Fit_Base
...: Additional arguments.

Examples

if (FALSE) { # \dontrun{
  fit <- rtmb_irt(data = BigFive[, 1:5], model = "2pl")
  map_fit <- fit$optimize()
  ii <- item_info(map_fit)
  plot(ii)
} # }