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Test if a numeric value is a whole number

Source: R/is.wholeNumber.r
is.wholeNumber.Rd

Sometimes numeric values can appear to be whole numbers but are actually represented in the computer as floating-point values. In these cases, simple inspection of a value will not tell you if it is a whole number or not. This function tests if a number is "close enough" to an integer to be a whole number. Note that is.integer will indicate if a value is of class integer (which if it is, will always be a whole number), but objects of class numeric will not evaluate to TRUE even if they are "supposed" to represent integers.

Usage

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

Arguments

x

A numeric or integer vector.

tol

Largest absolute difference between a value and its integer representation for it to be considered a whole number.

Value

A logical vector.

See also

is.integer

Examples


x <- c(4, 12 / 3, 21, 21.1)
is.wholeNumber(x)
#> [1]  TRUE  TRUE  TRUE FALSE