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#' @title Out-of-bag Error Measure
#'
#' @name mlr_measures_oob_error
#' @include Measure.R
#'
#' @description
#' Returns the out-of-bag error of the [Learner] for learners that support it
#' (learners with property `"oob_error"`).
#' Returns `NA` for unsupported learners.
#'
#' @templateVar id oob_error
#' @template measure
#'
#' @template seealso_measure
#' @export
MeasureOOBError = R6Class("MeasureOOBError",
inherit = Measure,
public = list(
#' @description
#' Creates a new instance of this [R6][R6::R6Class] class.
initialize = function() {
super$initialize(
id = "oob_error",
task_type = NA_character_,
properties = c("na_score", "requires_learner", "requires_no_prediction"),
predict_sets = NULL,
predict_type = NA_character_,
range = c(-Inf, Inf),
minimize = TRUE,
label = "Out-of-bag Error",
man = "mlr3::mlr_measures_oob_error"
)
}
),
private = list(
.score = function(prediction, learner, ...) {
learner = learner$base_learner()
if ("oob_error" %nin% learner$properties) {
return(NA_real_)
}
return(learner$oob_error())
}
)
)
#' @include mlr_measures.R
mlr_measures$add("oob_error", function() MeasureOOBError$new())
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