subset.jointdata function

Subsetting object of class jointdata

Returns an object of class jointdata which is a subset of an original object of class jointdata.

## S3 method for class 'jointdata'
subset(x, subj.subset, ...)

Arguments

• x: an object of class jointdata.
• subj.subset: vector of subject identifiers, to include in the data subset. This must be a unique vector of patient identifiers.
• ...: further arguments to be passed to or from other methods.

Returns

An object of class jointdata, with data only on a subset of subjects.

Examples

data(heart.valve)
heart.surv <- UniqueVariables(heart.valve,
                              var.col = c("fuyrs", "status"),
                              id.col = "num")
heart.long <- heart.valve[, c(1, 4, 5, 7, 8, 9, 10, 11)]
heart.jd <- jointdata(longitudinal = heart.long, 
                      survival = heart.surv,
                      id.col = "num",
                      time.col = "time")
take <- heart.jd$survival$num[heart.jd$survival$status == 0]
heart.jd.cens <- subset(heart.jd, take)

Author(s)

Ines Sousa