An auxiliary function for the
qualityF parameter in the
It is based on the gini index as a measure of information (Stoffel and Raileanu, 2000).
an integer vector corresponding to a distribution of attribute values.
a numeric value indicating the gini index of an attribute.
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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