Unlike is.integer(), which checks the type of argument is integer,
this function checks whether the value of the argument is an integer
(within a specified tolerance).
Usage
is.wholenumber(x, tol = .Machine$double.eps^0.5)
Value
a logical vector indicating whether x has a whole number value
Arguments
x
a vector
tol
a numeric tolerance
Details
This function is borrowed from the examples for is.integer()