X.gini: The gini-index measure

Description Usage Arguments Value Author(s) References

View source: R/FeatureSelection.OtherFuncCollections.R

Description

An auxiliary function for the qualityF parameter in the FS.greedy.heuristic.reduct.RST, FS.DAAR.heuristic.RST and FS.greedy.heuristic.superreduct.RST functions. It is based on the gini index as a measure of information (Stoffel and Raileanu, 2000).

Usage

1
X.gini(decisionDistrib)

Arguments

decisionDistrib

an integer vector corresponding to a distribution of attribute values.

Value

a numeric value indicating the gini index of an attribute.

Author(s)

Andrzej Janusz

References

K. Stoffel and L. E. Raileanu, "Selecting Optimal Split-Functions with Linear Threshold Unit Trees and Madaline-Style Networks", in: Research and Development in Intelligent Systems XVII, BCS Conference Series (2000).


RoughSets documentation built on May 29, 2017, 7:06 p.m.

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