vcov.betareg {betareg} | R Documentation |
Returns the variance-covariance matrix of the main parameters of a betareg fitted model object.
vcov.betareg(object, ...)
object |
a fitted model using betareg. |
... |
further arguments passed to or from other methods. |
A matrix of the estimated covariances between the parameter estimates in the linear or non-linear predictor of the model.
Alexandre de Bustamante Simas, Instituto de Matemática Pura e Aplicada (alesimas@impa.br). This function was inspired on the function made by Achim Zeileis.
data(pratergrouped) fit <- betareg(oil ~ batch1 + batch2 + batch3 + batch4 + batch5 + batch6 + batch7 + batch8 + batch9 + temp, data=pratergrouped) vcov(fit)