joineR (version 1.0-2)

subset.jointdata: Subsetting object of class 'jointdata'

Description

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

Usage

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

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.

Value

• The function 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)