Tests for data / model.frame() equality too strict

[matthiasgomolka]

When estimating a plm() model, all variables in model.frame() gain the additional class attribute "pseries". This leads to an error in

  if (!data.table::fsetequal(stats::na.omit(model_frame), 
    stats::na.omit(data[, names(model_frame), with = FALSE]))) {
    stop("'data' is not the data.frame which was used in 'model'.")
  }

within sdc_model().

Here' a reprex:

library(plm)
library(sdcLog)

data("Grunfeld", package="plm")

mod_plm <- plm(inv~value+capital, data = Grunfeld, model = "within")
sdc_model(Grunfeld, mod_plm, id_var = "firm")
#> Error in .set_ops_arg_check(x, y, all): Item 1 of x is 'pseries' but the corresponding item of y is 'numeric'.

^{Created on 2023-03-02 with reprex v2.0.2}

Session info

sessioninfo::session_info()
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