check_key | R Documentation |
Checks that columns in a data frame represent a unique key. By default all the columns are checked.
check_key(
x,
key = names(x),
na_distinct = FALSE,
x_name = substitute(x),
error = TRUE
)
x |
The data to check. |
key |
A character vector of the column names representing the key. |
na_distinct |
A flag specifying whether missing values should be considered distinct. |
x_name |
A string of the name of the object x. |
error |
A flag indicating whether to throw an informative error or immediately generate an informative message if the check fails. |
An invisible copy of x (if it doesn't throw an error).
check_data
data <- data.frame(x = 1:1, y = 1:2)
check_key(data, "x", error = FALSE)
check_key(data, c("y", "x"), error = FALSE)
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.