Get the Default Measure — default

Gets the default measures using the information in mlr_reflections$default_measures:

"classif.ce" for classification ("classif").
"regr.mse" for regression ("regr").
Add-on package may register additional default measures for their own task types.

Usage

default_measures(task_type)

Arguments

task_type: (character(1))
Get the default measure for the task type task_type, e.g., "classif" or "regr". If task_type is NULL, an empty list is returned.

Value

list of Measure.

Examples

default_measures("classif")
#> $classif.ce
#> 
#> ── <MeasureClassifSimple> (classif.ce): Classification Error ───────────────────
#> • Packages: mlr3 and mlr3measures
#> • Range: [0, 1]
#> • Minimize: TRUE
#> • Average: macro
#> • Parameters: list()
#> • Properties: weights
#> • Predict type: response
#> • Predict sets: test
#> • Aggregator: mean()
#> 
default_measures("regr")
#> $regr.mse
#> 
#> ── <MeasureRegrSimple> (regr.mse): Mean Squared Error ──────────────────────────
#> • Packages: mlr3 and mlr3measures
#> • Range: [0, Inf]
#> • Minimize: TRUE
#> • Average: macro
#> • Parameters: list()
#> • Properties: weights
#> • Predict type: response
#> • Predict sets: test
#> • Aggregator: mean()
#>