Identify possible variables uniquely identifying x
Usage
possible_ids(
dt,
exclude = NULL,
include = NULL,
verbose = getOption("possible_ids.verbose")
)Arguments
- dt
data frame
- exclude
character: Exclude variables to be selected as identifiers. It could be either the name of the variables of one type of the variable prefixed by "_". For instance, "_numeric" or "_character".
- include
character: Name of variable to be included, that might belong to the group excluded in the
exclude- verbose
logical: If FALSE no message will be displayed. Default is TRUE
Examples
library(data.table)
x4 = data.table(id1 = c(1, 1, 2, 3, 3),
id2 = c(1, 1, 2, 3, 4),
t = c(1L, 2L, 1L, 2L, NA_integer_),
x = c(16, 12, NA, NA, 15))
possible_ids(x4)
#> ✔ There are no duplicates in data frame
#> → we found 5 possible ids
#> $V1
#> [1] "id1" "t"
#>
#> $V2
#> [1] "id1" "x"
#>
#> $V3
#> [1] "id2" "t"
#>
#> $V4
#> [1] "id2" "x"
#>
#> $V5
#> [1] "t" "x"
#>