modelparm(model, coef., vcov., df, ...)coef and vcov methods
for arbitrary models to
return a vector of $p$ fixed effects model parameters (coef)
and corresponding $p vcov). The coef. and vcov. arguments can be used to define
modified coef or vcov methods for a specific model.
Methods for lmer and survreg
objects are available (internally).
For objects inheriting from class lm the degrees of
freedom are determined from model and the corresponding
multivariate $t$ distribution is used by all methods to glht
objects. By default, the asymptotic multivariate normal distribution
is used in all other cases unless df is specified by the user.
modelparm with elements