TaskSupervised: Supervised Task

In mllg/mlr3: Machine Learning in R - Next Generation

Description

This is the abstract base class for task objects like TaskClassif and TaskRegr. It extends Task with methods to handle a target columns.

Format

R6::R6Class object inheriting from Task.

Construction

t = TaskSupervised$new(id, task_type, backend, target)

• id :: character(1)
  Identifier for the task.

• backend :: DataBackend
  Either a DataBackend, or any object which is convertible to a DataBackend with as_data_backend(). E.g., a data.frame() will be converted to a DataBackendDataTable.

• task_type :: character(1)
  Set in the classes which inherit from this class. Must be an element of mlr_reflections$task_types$type.

• target :: character(1)
  Name of the target column.

Fields

See Task.

Methods

All methods from Task, and additionally:

• truth(row_ids = NULL) :: any
  True response for specified row_ids. Format depends on the task type. Defaults to all rows with role "use".

See Also

Other Task: TaskClassif, TaskRegr, Task, mlr_tasks

Examples

task = TaskSupervised$new("iris", task_type = "classif", backend = iris, target = "Species")

mllg/mlr3 documentation built on Sept. 27, 2019, 9:38 a.m.