mlr: makeCostMeasure – R documentation

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mlr

makeCostMeasure

Creates a measure for non-standard misclassification costs.

Description

Creates a cost measure for non-standard classification error costs.

Usage

makeCostMeasure(
  id = "costs",
  minimize = TRUE,
  costs,
  combine = mean,
  best = NULL,
  worst = NULL,
  name = id,
  note = ""
)

Arguments

`id`	(`character(1)`) Name of measure. Default is “costs”.
`minimize`	(`logical(1)`) Should the measure be minimized? Otherwise you are effectively specifying a benefits matrix. Default is `TRUE`.
`costs`	(matrix) Matrix of misclassification costs. Rows and columns have to be named with class labels, order does not matter. Rows indicate true classes, columns predicted classes.
`combine`	(`function`) How to combine costs over all cases for a SINGLE test set? Note this is not the same as the `aggregate` argument in makeMeasure You can set this as well via setAggregation, as for any measure. Default is mean.
`best`	(`numeric(1)`) Best obtainable value for measure. Default is -`Inf` or `Inf`, depending on `minimize`.
`worst`	(`numeric(1)`) Worst obtainable value for measure. Default is `Inf` or -`Inf`, depending on `minimize`.
`name`	(character) Name of the measure. Default is `id`.
`note`	(character) Description and additional notes for the measure. Default is “”.

Value

Measure.

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

makeCostMeasure

Description

Usage

Arguments

Value

See Also

mlr

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