mlr3 (version 0.1.0-9000)

TaskSupervised: Supervised Task

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.

• 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_generators, mlr_tasks

Examples

# NOT RUN {
task = TaskSupervised$new("iris", task_type = "classif", backend = iris, target = "Species")
# }