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Rescale using min-max normalization

Source: R/dataprep.R
rescale_min_max.Rd

This function rescales variable(s) in a data.frame using min-max normalization with arbitrary min and max values.

Usage

rescale_min_max(df, vars, min = 0, max = 1)

Arguments

df

data.frame

vars

(character) variables to rescale

min

(numeric) new minimum value (default 0)

max

(numeric) new maximum value (default 1)

Value

df with vars rescaled

Details

Values are rescaled by subtracting the minimum from each value and multiplying by the new range, and dividing by the current range, and adding the new minimum (which acts as an offset). Missing values remain missing. See Feature scaling (Wikipedia)

Examples

df <- df |> rescale_min_max(c("x1", "x2", "x3"))
#> [1] "Rescaled vars to range from 0 to 1:"
#> [1] "x1" "x2" "x3"