Proxy-Filtor that Filters According to its Configuration Parameter

Filtor that performs the operation in its operation configuration parameter. This can be used to make filtor operations fully parametrizable.

Configuration Parameters

• operation :: Filtor
  Operation to perform. Must be set by the user. This is primed when $prime() of SelectorProxy is called, and also when $operate() is called, to make changing the operation as part of self-adaption possible. However, if the same operation gets used inside multiple SelectorProxy objects, then it is recommended to $clone(deep = TRUE) the object before assigning them to operation to avoid frequent re-priming.

Supported Operand Types

Supported Param classes are: ParamLgl, ParamInt, ParamDbl, ParamFct

Dictionary

This Selector can be created with the short access form sel() (sels() to get a list), or through the the dictionary dict_selectors in the following way:

# preferred:
sel("proxy")
sels("proxy")  # takes vector IDs, returns list of Selectors

# long form:
dict_selectors$get("proxy")

See also

Other filtors: Filtor, FiltorSurrogate, dict_filtors_maybe, dict_filtors_null, dict_filtors_surprog, dict_filtors_surtour

Other filtor wrappers: dict_filtors_maybe

Super classes

miesmuschel::MiesOperator -> miesmuschel::Filtor -> FiltorProxy

Methods

Public methods

• FiltorProxy$new()

• FiltorProxy$prime()

• FiltorProxy$clone()

Inherited methods

• miesmuschel::MiesOperator$help()
• miesmuschel::MiesOperator$operate()
• miesmuschel::MiesOperator$print()
• miesmuschel::MiesOperator$repr()
• miesmuschel::Filtor$needed_input()

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Method new()

Initialize the FiltorProxy object.

Usage

FiltorProxy$new()

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Method prime()

See MiesOperator method. Primes both this operator, as well as the operator given to the operation configuration parameter. Note that this modifies the $param_set$values$operation object.

Usage

FiltorProxy$prime(param_set)

Arguments

param_set

(ParamSet)
Passed to MiesOperator$prime().

Returns

invisible self.

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Method clone()

The objects of this class are cloneable with this method.

Usage

FiltorProxy$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

Examples

library("mlr3")
library("mlr3learners")
fp = ftr("proxy")
p = ps(x = p_dbl(-5, 5))
known_data = data.frame(x = 1:5)
fitnesses = 1:5
new_data = data.frame(x = c(2.5, 4.5))

fp$param_set$values$operation = ftr("null")
fp$prime(p)
fp$operate(new_data, known_data, fitnesses, 1)
#> [1] 1

fp$param_set$values$operation = ftr("surprog", lrn("regr.lm"), filter.pool_factor = 2)
fp$operate(new_data, known_data, fitnesses, 1)
#> [1] 2