Import an eRm fit to an mfrmr-compatible bundle

Extracts item / person parameters from an eRm::PCM() / eRm::RM() fit. Current eRm person tables use Person Parameter and Std.Error; historical theta / thetapar estimate labels are also accepted. Unknown or internally misaligned person-table schemas stop with an explicit error rather than silently recycling rows. Same caveats as import_mirt_fit().

Usage

import_erm_fit(fit, model = c("RSM", "PCM", "GPCM"), item_facet = "Item")

Arguments

fit

An object returned by eRm::PCM(), eRm::RM(), or eRm::RSM().

model

Same as import_mirt_fit().

item_facet

Name to assign to the item facet.

Value

An mfrm_imported_fit object.

See also

import_mirt_fit(), import_tam_fit()

Examples

# \donttest{
if (requireNamespace("eRm", quietly = TRUE)) {
  response_matrix <- matrix(sample(0:3, 60, replace = TRUE), nrow = 20)
  colnames(response_matrix) <- paste0("Item", seq_len(ncol(response_matrix)))
  fit <- eRm::PCM(response_matrix)
  imported <- import_erm_fit(fit, model = "PCM")
  imported$summary
}
#>   Model Method Source  N Persons Facets Categories    LogLik AIC BIC Converged
#> 1   PCM    CML    eRm 20      20      1         NA -34.92457  NA  NA      TRUE
#>   ConvergenceStatus
#> 1          imported
# }