Calculate Variance-Covariance Matrix of Fixed Effects for an 'VCA' Object
Return the variance-covariance matrix of fixed effects for a linear mixed model applicable for objects of class 'VCA'.
## S3 method for class 'VCA' vcov(object, quiet = FALSE, ...)
object |
(VCA) object for which the variance-covariance matrix of fixed effects shall be calculated |
quiet |
(logical) TRUE = will suppress any warning, which will be issued otherwise |
... |
additional parameters |
Actually this function only extracts this matrix or, if not available, calls function
vcovFixed which performs calculations. It exists for compatibility reasons,
i.e. for coneniently using objects of class 'VCA' with other packages expecting this
function, e.g. the 'multcomp' package for general linear hypotheses for parametric
models.
(matrix) corresponding to the variance-covariance matrix of fixed effects
## Not run: data(dataEP05A2_1) fit1 <- anovaMM(y~day/(run), dataEP05A2_1) vcov(fit1) fit2 <- anovaVCA(y~day/run, dataEP05A2_1) vcov(fit2) ## End(Not run)
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