Perform feature selection using the F-test method

This function selects features from the input data matrix X using the F-test method and the provided feature selection specification.

Usage

# S3 method for FTest
select_features(obj, X, Y, ...)

Arguments

obj

The feature selection specification created by feature_selector().

X

The input data matrix.

Y

The response variable.

...

extra args (not used)

Value

A logical vector indicating which features to retain.

Details

The F-test method computes a one-way ANOVA for every column in the feature matrix.

See also

feature_selector for creating a feature selection specification.

Examples

fsel <- feature_selector("FTest", "top_k", 1000)
X <- as.data.frame(matrix(rnorm(100 * 10), 100, 10))
Y <- rep(letters[1:5], 20)
selected_features <- select_features(fsel, X, Y)
#> selecting features via FTest
#> cutoff type top_k
#> cutoff value 1000
#> Warning: NAs introduced by coercion
#> Warning: missing values for 'group'
#> retaining 10 features in matrix with 10 columns