X.gini: The gini-index measure

Description Usage Arguments Value Author(s) References

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).



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