joineRML (version 0.1.1)

getVarCov.mjoint: Extract variance-covariance matrix of random effects from an mjoint object

Description

Extract variance-covariance matrix of random effects from an mjoint object.

Usage

"getVarCov"(object, ...)

Arguments

object

an object inheriting from class mjoint for a joint model of time-to-event and multivariate longitudinal data.

...

additional arguments; currently none are used.

Value

A variance-covariance matrix.

References

Pinheiro JC, Bates DM. Mixed-Effects Models in S and S-PLUS. New York: Springer Verlag; 2000.

See Also

getVarCov for the generic method description.

Examples

## Not run: 
# # Fit a joint model with bivariate longitudinal outcomes
# 
# data(heart.valve)
# hvd <- heart.valve[!is.na(heart.valve$log.grad) & !is.na(heart.valve$log.lvmi), ]
# 
# fit2 <- mjoint(
#     formLongFixed = list("grad" = log.grad ~ time + sex + hs,
#                          "lvmi" = log.lvmi ~ time + sex),
#     formLongRandom = list("grad" = ~ 1 | num,
#                           "lvmi" = ~ time | num),
#     formSurv = Surv(fuyrs, status) ~ age,
#     data = list(hvd, hvd),
#     inits = list("gamma" = c(0.11, 1.51, 0.80)),
#     timeVar = "time",
#     verbose = TRUE)
# 
# getVarCov(fit2)
# ## End(Not run)