mlr_measures_debug_classif: Debug Measure for Classification

In mlr3: Machine Learning in R - Next Generation

Debug Measure for Classification

Description

This measure returns the number of observations in the PredictionClassif object. Its main purpose is debugging. The parameter na_ratio (numeric(1)) controls the ratio of scores which randomly are set to NA, between 0 (default) and 1.

Dictionary

This Measure can be instantiated via the dictionary mlr_measures or with the associated sugar function msr():

mlr_measures$get("debug_classif")
msr("debug_classif")

Meta Information

• Task type: “NA”

• Range: [0, \infty)

• Minimize: NA

• Average: macro

• Required Prediction: “response”

• Required Packages: mlr3

Parameters

Id	Type	Default	Range
na_ratio	numeric	-	[0, 1]

Super class

mlr3::Measure -> MeasureDebugClassif

Methods

Public methods

• MeasureDebugClassif$new()

• MeasureDebugClassif$clone()

Inherited methods

• mlr3::Measure$aggregate()
• mlr3::Measure$format()
• mlr3::Measure$help()
• mlr3::Measure$print()
• mlr3::Measure$score()

---

Method new()

Creates a new instance of this R6 class.

Usage

MeasureDebugClassif$new()

---

Method clone()

The objects of this class are cloneable with this method.

Usage

MeasureDebugClassif$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

See Also

• Chapter in the mlr3book: https://mlr3book.mlr-org.com/chapters/chapter2/data_and_basic_modeling.html#sec-eval

• Package mlr3measures for the scoring functions. Dictionary of Measures: mlr_measures as.data.table(mlr_measures) for a table of available Measures 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 Measure: Measure, MeasureClassif, MeasureRegr, MeasureSimilarity, mlr_measures, mlr_measures_aic, mlr_measures_bic, mlr_measures_classif.costs, mlr_measures_elapsed_time, mlr_measures_internal_valid_score, mlr_measures_oob_error, mlr_measures_regr.pinball, mlr_measures_regr.rqr, mlr_measures_regr.rsq, mlr_measures_selected_features

Examples

task = tsk("wine")
learner = lrn("classif.featureless")
measure = msr("debug_classif", na_ratio = 0.5)
rr = resample(task, learner, rsmp("cv", folds = 5))
rr$score(measure)

mlr3 documentation built on Sept. 14, 2025, 1:08 a.m.