FSelector {mlr3fselect}

FSelector

Description

The 'FSelector“ implements the optimization algorithm.

Details

FSelector is an abstract base class that implements the base functionality each fselector must provide.

Resources

There are several sections about feature selection in the mlr3book.

• Learn more about fselectors.

The gallery features a collection of case studies and demos about optimization.

• Utilize the built-in feature importance of models with Recursive Feature Elimination.

• Run a feature selection with Shadow Variable Search.

Public fields

id

(character(1))
Identifier of the object. Used in tables, plot and text output.

Active bindings

param_set

paradox::ParamSet
Set of control parameters.

properties

(character())
Set of properties of the fselector. Must be a subset of mlr_reflections$fselect_properties.

packages

(character())
Set of required packages. Note that these packages will be loaded via requireNamespace(), and are not attached.

label

(character(1))
Label for this object. Can be used in tables, plot and text output instead of the ID.

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()⁠.

Methods

Public methods

• FSelector$new()

• FSelector$format()

• FSelector$print()

• FSelector$help()

• FSelector$clone()

Method new()

Creates a new instance of this R6 class.

Usage

FSelector$new(
  id = "fselector",
  param_set,
  properties,
  packages = character(),
  label = NA_character_,
  man = NA_character_
)

Arguments

id

(character(1))
Identifier for the new instance.

param_set

paradox::ParamSet
Set of control parameters.

properties

(character())
Set of properties of the fselector. Must be a subset of mlr_reflections$fselect_properties.

packages

(character())
Set of required packages. Note that these packages will be loaded via requireNamespace(), and are not attached.

label

(character(1))
Label for this object. Can be used in tables, plot and text output instead of the ID.

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 format()

Helper for print outputs.

Usage

FSelector$format(...)

Arguments

...

(ignored).

Returns

(character()).

Method print()

Print method.

Usage

FSelector$print()

Returns

(character()).

Method help()

Opens the corresponding help page referenced by field ⁠$man⁠.

Usage

FSelector$help()

Method clone()

The objects of this class are cloneable with this method.

Usage

FSelector$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

See Also

Other FSelector: mlr_fselectors, mlr_fselectors_design_points, mlr_fselectors_exhaustive_search, mlr_fselectors_genetic_search, mlr_fselectors_random_search, mlr_fselectors_rfe, mlr_fselectors_rfecv, mlr_fselectors_sequential, mlr_fselectors_shadow_variable_search