chiSquared: Chi squared measure

In FSinR: Feature Selection

Description

Generates an evaluation function that calculates the Chi squared value \insertCitePearson1900FSinR, evaluating the selected features individually (individual measure). This function is called internally within the filterEvaluator function.

Usage

chiSquared()

Value

Returns a function that is used to generate an individual evaluation measure using chi squared.

References

\insertAllCited

Examples

## Not run:  

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

# Generate the evaluation function with Chi squared
chiSquared_evaluator <- chiSquared()
# Evaluate the features (parameters: dataset, target variable and features)
chiSquared_evaluator(iris,'Species',c('Sepal.Length'))

## End(Not run)

Example output

[1] 156.2667

FSinR documentation built on Nov. 23, 2020, 5:10 p.m.