Creates a Task of arbitrary size.
Predefined task generators are stored in the dictionary mlr_task_generators,
e.g. xor.
See also
Dictionary of TaskGenerators: mlr_task_generators
as.data.table(mlr_task_generators)for a table of available TaskGenerators in the running session (depending on the loaded packages).Extension packages for additional task types:
mlr3proba for probabilistic supervised regression and survival analysis.
mlr3cluster for unsupervised clustering.
Other TaskGenerator:
mlr_task_generators,
mlr_task_generators_2dnormals,
mlr_task_generators_cassini,
mlr_task_generators_circle,
mlr_task_generators_friedman1,
mlr_task_generators_moons,
mlr_task_generators_simplex,
mlr_task_generators_smiley,
mlr_task_generators_spirals,
mlr_task_generators_xor
Public fields
id(
character(1))
Identifier of the object. Used in tables, plot and text output.label(
character(1))
Label for this object. Can be used in tables, plot and text output instead of the ID.task_type(
character(1))
Task type, e.g."classif"or"regr".For a complete list of possible task types (depending on the loaded packages), see
mlr_reflections$task_types$type.param_set(paradox::ParamSet)
Set of hyperparameters.packages(
character(1))
Set of required packages. These packages are loaded, but not attached.man(
character(1))
String in the format[pkg]::[topic]pointing to a manual page for this object. Defaults toNA, but can be set by child classes.
Methods
Method new()
Creates a new instance of this R6 class.
Usage
TaskGenerator$new(
id,
task_type,
packages = character(),
param_set = ps(),
label = NA_character_,
man = NA_character_
)Arguments
id(
character(1))
Identifier for the new instance.task_type(
character(1))
Type of task, e.g."regr"or"classif". Must be an element of mlr_reflections$task_types$type.packages(
character())
Set of required packages. A warning is signaled by the constructor if at least one of the packages is not installed, but loaded (not attached) later on-demand viarequireNamespace().param_set(paradox::ParamSet)
Set of hyperparameters.label(
character(1))
Label for the new instance.man(
character(1))
String in the format[pkg]::[topic]pointing to a manual page for this object. The referenced help package can be opened via method$help().
Method generate()
Creates a task of type task_type with n observations, possibly using additional settings stored in param_set.
Returns
Task.