unique_columns: List columns with unique values for every row.
Description
Identify columns with unique values for each row in the supplied dataset.
Usage
unique_columns(tbl)
Arguments
tbl
A data frame or tibble.
Details
A function to return a list of the names of those columns which have a
unique value for each row in the dataset, excluding real valued
columns. This is used by Rattle V6 to identify potential identifier
variables.