mlr_learners_clust.birch: BIRCH Clustering Learner

In mlr-org/mlr3cluster: Cluster Extension for 'mlr3'

BIRCH Clustering Learner

Description

BIRCH (Balanced Iterative Reducing Clustering using Hierarchies) clustering. Calls stream::DSC_BIRCH() from stream.

Dictionary

This mlr3::Learner can be instantiated via the dictionary mlr3::mlr_learners or with the associated sugar function mlr3::lrn():

mlr_learners$get("clust.birch")
lrn("clust.birch")

Meta Information

• Task type: “clust”

• Predict Types: “partition”

• Feature Types: “integer”, “numeric”

• Required Packages: mlr3, mlr3cluster, stream

Parameters

Id	Type	Default	Range
threshold	numeric	-	[0, \infty)
branching	integer	-	[1, \infty)
maxLeaf	integer	-	[1, \infty)
maxMem	integer	0	[0, \infty)
outlierThreshold	numeric	0.25	(-\infty, \infty)

Super classes

mlr3::Learner -> mlr3cluster::LearnerClust -> LearnerClustBIRCH

Methods

Public methods

• LearnerClustBIRCH$new()

• LearnerClustBIRCH$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$print()
• mlr3::Learner$train()
• mlr3cluster::LearnerClust$reset()

---

Method new()

Creates a new instance of this R6 class.

Usage

LearnerClustBIRCH$new()

---

Method clone()

The objects of this class are cloneable with this method.

Usage

LearnerClustBIRCH$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

References

Zhang, Tian, Ramakrishnan, Raghu, Livny, Miron (1996). “BIRCH: An Efficient Data Clustering Method for Very Large Databases.” ACM sigmod record, 25(2), 103–114.

Zhang, Tian, Ramakrishnan, Raghu, Livny, Miron (1997). “BIRCH: A new data clustering algorithm and its applications.” Data Mining and Knowledge Discovery, 1, 141–182.

Hahsler M, Bolaños M, Forrest J (2017). “Introduction to stream: An Extensible Framework for Data Stream Clustering Research with R.” Journal of Statistical Software, 76(14), 1–50. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.18637/jss.v076.i14")}.

See Also

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

• Package mlr3extralearners for more learners.

• 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).

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

• Extension packages for additional task types:

  • mlr3proba for probabilistic supervised regression and survival analysis.

  • mlr3cluster for unsupervised clustering.

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

Other Learner: mlr_learners_clust.MBatchKMeans, mlr_learners_clust.SimpleKMeans, mlr_learners_clust.agnes, mlr_learners_clust.ap, mlr_learners_clust.bico, mlr_learners_clust.cmeans, mlr_learners_clust.cobweb, mlr_learners_clust.dbscan, mlr_learners_clust.dbscan_fpc, mlr_learners_clust.diana, mlr_learners_clust.em, mlr_learners_clust.fanny, mlr_learners_clust.featureless, mlr_learners_clust.ff, mlr_learners_clust.hclust, mlr_learners_clust.hdbscan, mlr_learners_clust.kkmeans, mlr_learners_clust.kmeans, mlr_learners_clust.mclust, mlr_learners_clust.meanshift, mlr_learners_clust.optics, mlr_learners_clust.pam, mlr_learners_clust.xmeans

Examples

if (requireNamespace("stream")) {
  learner = mlr3::lrn("clust.birch")
  print(learner)

  # available parameters:
  learner$param_set$ids()
}

mlr-org/mlr3cluster documentation built on Dec. 24, 2024, 3:19 a.m.