Returns all columns except the last one.
Details
This can be applied to tabular datasets used for supervised learning in rtemis, where, by convention, the last column is the outcome variable and all other columns are features.
Examples
features(iris) |> head()
#> Sepal.Length Sepal.Width Petal.Length Petal.Width
#> 1 5.1 3.5 1.4 0.2
#> 2 4.9 3.0 1.4 0.2
#> 3 4.7 3.2 1.3 0.2
#> 4 4.6 3.1 1.5 0.2
#> 5 5.0 3.6 1.4 0.2
#> 6 5.4 3.9 1.7 0.4