| check_key {chk} | R Documentation |
Check Key
Description
Checks if columns have unique rows.
Usage
check_key(x, key = character(0), na_distinct = FALSE, x_name = NULL)
Arguments
x |
The object to check. |
key |
A character vector of the columns that represent a unique key. |
na_distinct |
A flag specifying whether missing values should be considered distinct. |
x_name |
A string of the name of object x or NULL. |
Value
An informative error if the test fails or an invisible copy of x.
See Also
Other check:
check_data(),
check_dim(),
check_dirs(),
check_files(),
check_names(),
check_values()
Examples
x <- data.frame(x = c(1, 2), y = c(1, 1))
check_key(x)
try(check_key(x, "y"))
[Package chk version 0.9.2 Index]