mlr_learners_dens.pen: Density Penalized Learner

In mlr-org/mlr3extralearners: Extra Learners For mlr3

Density Penalized Learner

Description

Density estimation using penalized B-splines with automatic selection of smoothing parameter. Calls pendensity::pendensity() from pendensity.

Dictionary

This Learner can be instantiated via lrn():

lrn("dens.pen")

Meta Information

• Task type: “dens”

• Predict Types: “pdf”, “cdf”

• Feature Types: “integer”, “numeric”

• Required Packages: mlr3, mlr3proba, mlr3extralearners, pendensity

Parameters

Id	Type	Default	Levels	Range
base	character	bspline	bspline, gaussian	-
no.base	numeric	41		(-\infty, \infty)
max.iter	numeric	20		(-\infty, \infty)
lambda0	numeric	500		(-\infty, \infty)
q	numeric	3		(-\infty, \infty)
sort	logical	TRUE	TRUE, FALSE	-
with.border	untyped	-		-
m	numeric	3		(-\infty, \infty)
eps	numeric	0.01		(-\infty, \infty)

Super classes

mlr3::Learner -> mlr3proba::LearnerDens -> LearnerDensPenalized

Methods

Public methods

• LearnerDensPenalized$new()

• LearnerDensPenalized$clone()

Inherited methods

• mlr3::Learner$base_learner()
• mlr3::Learner$encapsulate()
• mlr3::Learner$format()
• mlr3::Learner$help()
• mlr3::Learner$predict()
• mlr3::Learner$predict_newdata()
• mlr3::Learner$print()
• mlr3::Learner$reset()
• mlr3::Learner$train()

---

Method new()

Creates a new instance of this R6 class.

Usage

LearnerDensPenalized$new()

---

Method clone()

The objects of this class are cloneable with this method.

Usage

LearnerDensPenalized$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

Author(s)

RaphaelS1

References

Schellhase, Christian, Kauermann, Göran (2012). “Density estimation and comparison with a penalized mixture approach.” Computational Statistics, 27(4), 757–777.

See Also

• Dictionary of Learners: mlr3::mlr_learners.

• as.data.table(mlr_learners) for a table of available Learners in the running session (depending on the loaded packages).

• Chapter in the mlr3book: https://mlr3book.mlr-org.com/basics.html#learners

• mlr3learners for a selection of recommended learners.

• mlr3cluster for unsupervised clustering learners.

• mlr3pipelines to combine learners with pre- and postprocessing steps.

• mlr3tuning for tuning of hyperparameters, mlr3tuningspaces for established default tuning spaces.

Examples

# Define the Learner
learner = mlr3::lrn("dens.pen")
print(learner)

# Define a Task
task = mlr3::tsk("faithful")

# Create train and test set
ids = mlr3::partition(task)

# Train the learner on the training ids
learner$train(task, row_ids = ids$train)

print(learner$model)


# Make predictions for the test rows
predictions = learner$predict(task, row_ids = ids$test)

# Score the predictions
predictions$score()

mlr-org/mlr3extralearners documentation built on Dec. 21, 2024, 2:21 p.m.