add_id.Rdadd_id just ensures data is a data.table and adds a columns named .id
add_id(data)Source data (data.frame or data.table)
data.table object with a column named .id
add_id in called behing the scence by crazyfy
if needed to ensure a valid id is present in source data.
Still, we recommand to start from a dataset already having an id, be it generated
by a call to add_id or already pre-existing to ensure correct source data enrichment.
library(stranger)
data(iris)
(iris.id <- add_id(iris))
#> Sepal.Length Sepal.Width Petal.Length Petal.Width Species .id
#> 1: 5.1 3.5 1.4 0.2 setosa 1
#> 2: 4.9 3.0 1.4 0.2 setosa 2
#> 3: 4.7 3.2 1.3 0.2 setosa 3
#> 4: 4.6 3.1 1.5 0.2 setosa 4
#> 5: 5.0 3.6 1.4 0.2 setosa 5
#> ---
#> 146: 6.7 3.0 5.2 2.3 virginica 146
#> 147: 6.3 2.5 5.0 1.9 virginica 147
#> 148: 6.5 3.0 5.2 2.0 virginica 148
#> 149: 6.2 3.4 5.4 2.3 virginica 149
#> 150: 5.9 3.0 5.1 1.8 virginica 150