giniIndex {FSinR}

Gini index measure

Description

Generates an evaluation function that calculates the gini index (Ceriani and Verme 2012-Sep-01) of discrete features (set measure). This function is called internally within the filterEvaluator function.

Usage

giniIndex()

Value

Returns a function that is used to generate an evaluation set measure using the Gini index value for the selected features.

Author(s)

Adan M. Rodriguez

References

Ceriani L, Verme P (2012-Sep-01). “The origins of the Gini index: extracts from Variabilità e Mutabilità (1912) by Corrado Gini.” The Journal of Economic Inequality, 10, 421–443. doi: 10.1007/s10888-011-9188-x.

Examples

## Not run:  

## The direct application of this function is an advanced use that consists of using this 
# function directly to evaluate a set of features
## Classification problem

# A discrete dataset is used (in this case we use only several discrete columns)
adult <- adult[,c(4,9,10,15)]

# Generate the evaluation function with Gini index
giniIndex_evaluator <- giniIndex()
# Evaluate the features (parameters: dataset, target variable and features)
giniIndex_evaluator(adult,'income',c('race','sex','education'))

## End(Not run)