R: Create a feature filter.

makeFilter {mlr}

R Documentation

Create a feature filter.

Description

Creates and registers custom feature filters. Implemented filters can be listed with listFilterMethods. Additional documentation for the fun parameter specific to each filter can be found in the description.

Usage

makeFilter(name, desc, pkg, supported.tasks, supported.features, fun)

rf.importance

rf.min.depth

univariate

Arguments

`name`	(`character(1)`) Identifier for the filter.
`desc`	(`character(1)`) Short description of the filter.
`pkg`	(`character(1)`) Source package where the filter is implemented.
`supported.tasks`	(character) Task types supported.
`supported.features`	(character) Feature types supported.
`fun`	(`function(task, nselect, ...`) Function which takes a task and returns a named numeric vector of scores, one score for each feature of `task`. Higher scores mean higher importance of the feature. At least `nselect` features must be calculated, the remaining may be set to `NA` or omitted, and thus will not be selected. the original order will be restored if necessary.

Format

An object of class Filter of length 6.

Value

Object of class “Filter”.

References

Kira, Kenji and Rendell, Larry (1992). The Feature Selection Problem: Traditional Methods and a New Algorithm. AAAI-92 Proceedings.

Kononenko, Igor et al. Overcoming the myopia of inductive learning algorithms with RELIEFF (1997), Applied Intelligence, 7(1), p39-55.