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Item Response Curve for RTMB_Fit_Base

Source: R/methods_post_estimation.R
item_curve.RTMB_Fit_Base.Rd

Item Response Curve for RTMB_Fit_Base

Usage

# S3 method for class 'RTMB_Fit_Base'
item_curve(x, theta_seq = seq(-4, 4, length.out = 100), items = NULL, ...)

Arguments

x

An object of class RTMB_Fit_Base.

theta_seq

Sequence of trait values (ability) to evaluate.

items

Index or item names to restrict the calculation to specific items (optional).

...

Additional arguments.

Examples

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