Description Usage Arguments Value Examples
An extension to the vcov
function mainly to
cover the additional parameter involved in negative binomial models.
(Currently the same as vcov
apart from negative binomial models.)
1 2 3 4 5 6 7 |
object |
A fitted mdel objeds |
... |
currently ignored |
An extended variance matrix including parameters addition to the regression coefficients
1 2 | fm <- glm.nb(Days ~ Sex/(Age + Eth*Lrn), quine)
Sigma <- vcovx(fm)
|
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