Extract random effects estimates from an mjoint object
Extract random effects estimates from an mjoint object.
## S3 method for class 'mjoint' ranef(object, postVar = FALSE, ...)
object |
an object inheriting from class |
postVar |
logical: if |
... |
additional arguments; currently none are used. |
A data.frame (also of class ranef.mjoint) with rows
denoting the individuals and columns the random effects (e.g., intercepts,
slopes, etc.). If postVar=TRUE, the numeric matrix has an extra
attribute, postVar.
Graeme L. Hickey (graemeleehickey@gmail.com)
Pinheiro JC, Bates DM. Mixed-Effects Models in S and S-PLUS. New York: Springer Verlag; 2000.
Wulfsohn MS, Tsiatis AA. A joint model for survival and longitudinal data measured with error. Biometrics. 1997; 53(1): 330-339.
ranef for the generic method description, and
fixef.mjoint. To plot ranef.mjoint objects, see
plot.ranef.mjoint.
## 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)
ranef(fit2)
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