mlr: mergeSmallFactorLevels – R documentation

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mlr

mergeSmallFactorLevels

Merges small levels of factors into new level.

Description

Merges factor levels that occur only infrequently into combined levels with a higher frequency.

Usage

mergeSmallFactorLevels(
  task,
  cols = NULL,
  min.perc = 0.01,
  new.level = ".merged"
)

Arguments

`task`	(Task) The task.
`cols`	(character) Which columns to convert. Default is all factor and character columns.
`min.perc`	(`numeric(1)`) The smallest levels of a factor are merged until their combined proportion w.r.t. the length of the factor exceeds `min.perc`. Must be between 0 and 1. Default is 0.01.
`new.level`	(`character(1)`) New name of merged level. Default is “.merged”

Value

Task, where merged levels are combined into a new level of name new.level.

Bernd Bischl [aut] (<https://orcid.org/0000-0001-6002-6980>), Michel Lang [aut] (<https://orcid.org/0000-0001-9754-0393>), Lars Kotthoff [aut], Patrick Schratz [aut, cre] (<https://orcid.org/0000-0003-0748-6624>), Julia Schiffner [aut], Jakob Richter [aut], Zachary Jones [aut], Giuseppe Casalicchio [aut] (<https://orcid.org/0000-0001-5324-5966>), Mason Gallo [aut], Jakob Bossek [ctb] (<https://orcid.org/0000-0002-4121-4668>), Erich Studerus [ctb] (<https://orcid.org/0000-0003-4233-0182>), Leonard Judt [ctb], Tobias Kuehn [ctb], Pascal Kerschke [ctb] (<https://orcid.org/0000-0003-2862-1418>), Florian Fendt [ctb], Philipp Probst [ctb] (<https://orcid.org/0000-0001-8402-6790>), Xudong Sun [ctb] (<https://orcid.org/0000-0003-3269-2307>), Janek Thomas [ctb] (<https://orcid.org/0000-0003-4511-6245>), Bruno Vieira [ctb], Laura Beggel [ctb] (<https://orcid.org/0000-0002-8872-8535>), Quay Au [ctb] (<https://orcid.org/0000-0002-5252-8902>), Martin Binder [ctb], Florian Pfisterer [ctb], Stefan Coors [ctb], Steve Bronder [ctb], Alexander Engelhardt [ctb], Christoph Molnar [ctb], Annette Spooner [ctb]

Initial release

mergeSmallFactorLevels

Description

Usage

Arguments

Value

See Also

mlr

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