mlr3 (version 0.2.0)

mlr_resamplings_bootstrap: Bootstrap Resampling

Description

Splits data into bootstrap samples (sampling with replacement). Hyperparameters are the number of bootstrap iterations (repeats, default: 30) and the ratio of observations to draw per iteration (ratio, default: 1) for the training set.

Dictionary

This Resampling can be instantiated via the dictionary mlr_resamplings or with the associated sugar function rsmp():

mlr_resamplings$get("bootstrap")
rsmp("bootstrap")

Parameters

• repeats (integer(1)) Number of repetitions.

• ratio (numeric(1)) Ratio of observations to put into the training set.

Super class

mlr3::Resampling -> ResamplingBootstrap

Active bindings

iters

(integer(1)) Returns the number of resampling iterations, depending on the values stored in the param_set.

Methods

Public methods

• ResamplingBootstrap$new()

• ResamplingBootstrap$clone()

• mlr3::Resampling$format()

• mlr3::Resampling$help()

• mlr3::Resampling$instantiate()

• mlr3::Resampling$print()

• mlr3::Resampling$test_set()

• mlr3::Resampling$train_set()

Method new()

Creates a new instance of this R6 class.

Usage

ResamplingBootstrap$new()

Method clone()

The objects of this class are cloneable with this method.

Usage

ResamplingBootstrap$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

References

mlr3bischl_2012

See Also

Dictionary of Resamplings: mlr_resamplings

as.data.table(mlr_resamplings) for a complete table of all (also dynamically created) Resampling implementations.

Other Resampling: Resampling, mlr_resamplings_custom, mlr_resamplings_cv, mlr_resamplings_holdout, mlr_resamplings_insample, mlr_resamplings_repeated_cv, mlr_resamplings_subsampling, mlr_resamplings

Examples

# NOT RUN {
# Create a task with 10 observations
task = tsk("iris")
task$filter(1:10)

# Instantiate Resampling
rb = rsmp("bootstrap", repeats = 2, ratio = 1)
rb$instantiate(task)

# Individual sets:
rb$train_set(1)
rb$test_set(1)
intersect(rb$train_set(1), rb$test_set(1))

# Internal storage:
rb$instance$M # Matrix of counts
# }