Determine if an object `x` is an `mle` object.
Arguments
- x
the object to test
Value
Logical TRUE if x is an mle object, FALSE otherwise.
Examples
fit <- mle(theta.hat = c(mu = 5), sigma = matrix(0.1))
is_mle(fit) # TRUE
#> [1] TRUE
is_mle(list(a=1)) # FALSE
#> [1] FALSE