check_nrow | R Documentation |
Checks the number of rows of a data frame.
check_nrow(x, nrow = TRUE, x_name = substitute(x), error = TRUE)
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. |
check_ncol
and check_data
check_nrow(data.frame(x = 1), error = FALSE)
check_nrow(data.frame(x = integer(0)), error = FALSE)
check_nrow(data.frame(x = 1:2), nrow = 1, error = FALSE)
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