latrend (version 1.3.0)

trajectories: Extract the trajectories

Description

Transform or extract the trajectories from the given object to a standardized format.

The standardized data format is for method estimation by latrend, and for plotting functions.

Usage

trajectories(
  object,
  id = idVariable(object),
  time = timeVariable(object),
  response = responseVariable(object),
  ...
)
# S4 method for data.frame
trajectories(
  object,
  id = idVariable(object),
  time = timeVariable(object),
  response = responseVariable(object),
  ...
)
# S4 method for matrix
trajectories(
  object,
  id = idVariable(object),
  time = timeVariable(object),
  response = responseVariable(object),
  ...
)
# S4 method for call
trajectories(object, ..., envir)
# S4 method for lcModel
trajectories(
  object,
  id = idVariable(object),
  time = timeVariable(object),
  response = responseVariable(object),
  ...
)

Arguments

object

The data or model or extract the trajectories from.

id

The identifier variable name.

time

The time variable name.

response

The response variable name.

...

Additional arguments.

envir

The environment used to evaluate the data object in (e.g., in case object is of type call).

Value

A data.frame with columns matching the id, time, and response name arguments.

Details

The generic function removes unused factor levels in the Id column, and any trajectories which are only comprised of NAs in the response.

See Also

plotTrajectories latrend