This function checks whether the input is proper number, i.e., a single
numeric.
Usage
is_number(x, error = TRUE)
Arguments
- x
Any object.
- error
In the case that x is not a proper number, either TRUE
(default) to throw an error or FALSE to return invisibly FALSE.
Value
If error = TRUE, either invisibly TRUE or an error is thrown.
If error = FALSE, invisibly TRUE or FALSE.
