Extract the approximate var-cov matrix of estimated coefficients from fitted models.
Generic function: see vcov.
Extract the var-cov matrix of estimated coefficients for fitted models of formal class “glimML”.
Extract the var-cov matrix of estimated coefficients for fitted models of formal class “glimQL”.
Extract the var-cov matrix of estimated coefficients for fitted models of class “geese” (contributed package geepack).
Extract the var-cov matrix of estimated coefficients for fitted objects of class “geeglm” (contributed package geepack).