latrend (version 1.6.1)

idVariable: Extract the trajectory identifier variable

Description

Extracts the trajectory identifier variable (i.e., column name) from the given object.

Usage

idVariable(object, ...)
# S4 method for lcMethod
idVariable(object, ...)
# S4 method for lcModel
idVariable(object)
# S4 method for ANY
idVariable(object)

Value

A nonempty string, as character.

Arguments

object

The object.

...

Not used.

See Also

Other variables: responseVariable(), timeVariable()

Examples

method <- lcMethodLMKM(Y ~ Time, id = "Traj")
idVariable(method) # "Traj"

method <- lcMethodRandom("Y", id = "Id", time = "Time")
model <- latrend(method, latrendData)
idVariable(model) # "Id"