Description Usage Arguments Details Value Examples
Returns the variance-covariance matrix of the main parameters of a fitted model object.
1 2 |
object |
an object of class " |
... |
further arguments passed to or from other methods. |
This is a generic function.
Coefficients extracted from the model object object.
1 2 3 4 5 6 7 8 9 10 11 12 | ##### Example 3.1 Randomized Clinical Trial of Chronic Pain #####
data(cpain)
out1 = sanon(response ~ grp(treat, ref="placebo") + strt(center) + strt(diagnosis), data=cpain)
vcov(out1)
##### Example 3.2 Randomized Clinical Trial of Respiratory Disorder #####
data(resp)
P = rbind(rep(0, 4), diag(4), rep(0, 4))
out23 = sanon(cbind(baseline, visit1, visit2, visit3, visit4) ~ grp(treatment, ref="P")
+ strt(center) + strt(sex) + covar(age), data=resp, P=P)
# each four visits
vcov(out23)
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