vcov-method: Extract parameter variance covariance matrix

vcov-methodR Documentation

Extract parameter variance covariance matrix

Description

Extract parameter variance covariance matrix

Usage

## S4 method for signature 'SingleGroupClass'
vcov(object)

Arguments

object

an object of class SingleGroupClass, MultipleGroupClass, or MixedClass

References

Chalmers, R., P. (2012). mirt: A Multidimensional Item Response Theory Package for the R Environment. Journal of Statistical Software, 48(6), 1-29. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.18637/jss.v048.i06")}

Examples



x <- mirt(Science, 1, SE=TRUE)
vcov(x)



philchalmers/mirt documentation built on March 29, 2025, 10:42 a.m.