Methods for dpmirt_fit Objects

Print, summarize, and extract coefficients from a fitted DPMirt model.

Usage

# S3 method for class 'dpmirt_fit'
print(x, ...)

# S3 method for class 'dpmirt_fit'
summary(object, ...)

# S3 method for class 'dpmirt_fit'
coef(object, type = c("items", "persons"), ...)

Arguments

x, object

A dpmirt_fit object from dpmirt.

...

Additional arguments (currently unused).

type

For coef: character, "items" (default) or "persons".

Value

print and summary return the input invisibly. coef returns a data.frame of posterior mean estimates with one row per item or person.

Details

print displays a concise one-screen summary: model type, data dimensions, MCMC settings, WAIC, minimum ESS, and DPM cluster summary.

summary displays a comprehensive report including item parameter posterior means and SDs, person ability range, DPM diagnostics, and timing.

coef extracts posterior mean point estimates for items (type = "items") or persons (type = "persons").

See also

dpmirt for model fitting, dpmirt_estimates for PM/CB/GR estimators, dpmirt_diagnostics for detailed MCMC diagnostics

Other model fitting: dpmirt(), dpmirt_compile(), dpmirt_resume(), dpmirt_sample(), dpmirt_spec()

Examples

if (FALSE) { # \dontrun{
sim <- dpmirt_simulate(200, 20, model = "rasch", seed = 42)
fit <- dpmirt(sim$response, model = "rasch", prior = "normal",
              niter = 5000, nburnin = 1000, seed = 123)

# Print concise summary
print(fit)

# Detailed summary with item parameters
summary(fit)

# Extract item difficulty estimates
coef(fit, type = "items")

# Extract person ability estimates
coef(fit, type = "persons")
} # }