Normalize the numeric variables in a data frame
normalize(data, new_min = 0, new_max = 1)a data frame.
minimum for the transformed variables.
maximum for the transformed variables.
a data frame
normalize transforms all the numeric variables
in a data frame to have the same minimum and maximum values.
By default, this will be a minimum of 0 and maximum of 1.
Character variables and factors are left unchanged.
Use this function to be transform variables into a given range. The default is [0, 1], but [-1, 1], [0, 100], or any other range is permissible.
head(cars74)
#> auto mpg cyl disp hp drat wt qsec vs am
#> 1 Mazda RX4 21.0 cyl6 160 110 3.90 2.620 16.46 V-shaped manual
#> 2 Mazda RX4 Wag 21.0 cyl6 160 110 3.90 2.875 17.02 V-shaped manual
#> 3 Datsun 710 22.8 cyl4 108 93 3.85 2.320 18.61 straight manual
#> 4 Hornet 4 Drive 21.4 cyl6 258 110 3.08 3.215 19.44 straight automatic
#> 5 Hornet Sportabout 18.7 cyl8 360 175 3.15 3.440 17.02 V-shaped automatic
#> 6 Valiant 18.1 cyl6 225 105 2.76 3.460 20.22 straight automatic
#> gear carb
#> 1 gears4 carb4
#> 2 gears4 carb4
#> 3 gears4 carb1
#> 4 gears3 carb1
#> 5 gears3 carb2
#> 6 gears3 carb1
cars74_st <- normalize(cars74)
head(cars74_st)
#> auto mpg cyl disp hp drat wt
#> 1 Mazda RX4 0.4510638 cyl6 0.2217511 0.2049470 0.5253456 0.2830478
#> 2 Mazda RX4 Wag 0.4510638 cyl6 0.2217511 0.2049470 0.5253456 0.3482485
#> 3 Datsun 710 0.5276596 cyl4 0.0920429 0.1448763 0.5023041 0.2063411
#> 4 Hornet 4 Drive 0.4680851 cyl6 0.4662010 0.2049470 0.1474654 0.4351828
#> 5 Hornet Sportabout 0.3531915 cyl8 0.7206286 0.4346290 0.1797235 0.4927129
#> 6 Valiant 0.3276596 cyl6 0.3838863 0.1872792 0.0000000 0.4978266
#> qsec vs am gear carb
#> 1 0.2333333 V-shaped manual gears4 carb4
#> 2 0.3000000 V-shaped manual gears4 carb4
#> 3 0.4892857 straight manual gears4 carb1
#> 4 0.5880952 straight automatic gears3 carb1
#> 5 0.3000000 V-shaped automatic gears3 carb2
#> 6 0.6809524 straight automatic gears3 carb1