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vcov-method

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. doi: 10.18637/jss.v048.i06

Examples

## Not run: 
x <- mirt(Science, 1, SE=TRUE)
vcov(x)


## End(Not run)
mirt

Multidimensional Item Response Theory

v1.33.2
GPL (>= 3)
Authors
Phil Chalmers [aut, cre] (<https://orcid.org/0000-0001-5332-2810>), Joshua Pritikin [ctb], Alexander Robitzsch [ctb], Mateusz Zoltak [ctb], KwonHyun Kim [ctb], Carl F. Falk [ctb], Adam Meade [ctb], Lennart Schneider [ctb], David King [ctb], Chen-Wei Liu [ctb], Ogreden Oguzhan [ctb]
Initial release

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