Checks the number of rows of a data frame.
Usage
check_nrow(x, nrow = TRUE, x_name = substitute(x), error = TRUE)Arguments
- x
The object to check.
- nrow
A flag indicating whether x should have rows (versus no rows) or a missing value indicating no requirements or a count or count range of the number of rows.
@return An invisible copy of x (if it doesn't throw an error).
- 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.
Examples
check_nrow(data.frame(x = 1), error = FALSE)
#> Warning: `check_nrow()` was deprecated in checkr 0.5.1.
#> ℹ Please use `chk::check_data()` instead.
check_nrow(data.frame(x = integer(0)), error = FALSE)
#> Warning: data.frame(x = integer(0)) must have at least 1 row
check_nrow(data.frame(x = 1:2), nrow = 1, error = FALSE)
#> Warning: data.frame(x = 1:2) must have 1 row