Extract the approximate var-cov matrix of estimated coefficients from fitted models.

- ANY
Generic function: see

`vcov`

.- glimML
Extract the var-cov matrix of estimated coefficients for fitted models of formal class “glimML”.

- glimQL
Extract the var-cov matrix of estimated coefficients for fitted models of formal class “glimQL”.

- geese
Extract the var-cov matrix of estimated coefficients for fitted models of class “geese” (contributed package geepack).

- geeglm
Extract the var-cov matrix of estimated coefficients for fitted objects of class “geeglm” (contributed package geepack).

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