getVCOV: Obtain the asymptotic covariance matrix
Description
This function can be used to obtain the estimated asymptotic covariance matrix from a psychonetrics object.
Usage
getVCOV(model, approximate_SEs = FALSE)
Value
This function returns a matrix.
Arguments
- model
A psychonetrics model.
- approximate_SEs
Logical, should standard errors be approximated? If true, an approximate matrix inverse of the Fischer information is used to obtain the standard errors.