View source: R/selector.chi.squared.R
chi.squared | R Documentation |
The algorithm finds weights of discrete attributes basing on a chi-squared test.
chi.squared(formula, data)
formula |
a symbolic description of a model |
data |
a symbolic description of a model |
The result is equal to Cramer's V coefficient between source attributes and destination attribute.
a data.frame containing the worth of attributes in the first column and their names as row names
Piotr Romanski
library(mlbench)
data(HouseVotes84)
weights <- chi.squared(Class~., HouseVotes84)
print(weights)
subset <- cutoff.k(weights, 5)
f <- as.simple.formula(subset, "Class")
print(f)
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