Method for obtaining the variance-covariance matrix (or scalar)
# S3 method for class 'edist'
vcov(object, n = 10000, ...)The variance-covariance matrix of the edist object
# \donttest{
set.seed(1)
z <- normal(0, 1) * exponential(2)
vcov(z)
#> [1] 0.5027949
# }