vcov.ypbp {YPBP}

Variance-covariance matrix for a ypbp model

Description

This function extracts and returns the variance-covariance matrix associated with the regression coefficients when the maximum likelihood estimation approach is used in the model fitting.

Usage

## S3 method for class 'ypbp'
vcov(object, ...)

Arguments

object

an object of the class ypbp.

...

further arguments passed to or from other methods.

Value

the variance-covariance matrix associated with the regression coefficients.