R: Checks whether 'x' contains integer numbers.

is.wholenumber

R Documentation

Checks whether `x` contains integer numbers.

Borrowed from the example in integer.

is.wholenumber(x, tol = .Machine$double.eps^0.5)

`x`	a vector to be checked for integers
`tol`	an optional parameter specifying to which precision the check is to be performed.

Returns a vector of logicals with the same length as x; each element i is TRUE iff x[i] is an integer.

## Not run: 
is.wholenumber(1) # is TRUE
(x <- seq(1, 5, by = 0.5) )
is.wholenumber( x ) #-->  TRUE FALSE TRUE ...

## End(Not run)