R: Check a Vector For Being Numeric, Zero Or a Whole Number

Some numeric checks {DescTools} | R Documentation

## Check a Vector For Being Numeric, Zero Or a Whole Number

### Description

Test if x contains only integer numbers, or if is numeric or if it is zero.

### Usage

    IsWhole(x, all = FALSE, tol = sqrt(.Machine$double.eps), na.rm = FALSE)
    IsZero(x, tol = sqrt(.Machine$double.eps), na.rm = FALSE)
    IsNumeric(x, length.arg = Inf, integer.valued = FALSE, positive = FALSE, na.rm = FALSE)

### Arguments

`x` | a (non-empty) numeric vector of data values.
`all` | logical, specifying if the whole vector should be checked. If set to `TRUE` the function will return the result of `all(IsWhole(x))`.
`tol` | tolerance to be used
`length.arg` | integer, the length of the vector to be checked for.
`integer.valued` | logical, should x be checked as integer?
`positive` | logical, is x supposed to be positive?
`na.rm` | logical, indicating whether `NA` values should be stripped before the computation proceeds. Defaults to `FALSE`.

### Details

IsWhole is the suggested solution for checking for an integer value, as `is.integer` tests for `class(x) == "integer"` and does NOT test whether x (which might be of class "numeric") contains only integer numbers. (Why not simply implement it in base?)

IsZero tests float numeric values for being zero.

IsNumeric combines a test for numeric and integers.

### Value

logical vector of the same dimension as x.

### Author(s)

R-Core, Andri Signorell <andri@signorell.net>, Thomas W. Yee

### See Also

`is.integer`

### Examples

    (x <- seq(1,5, by=0.5))
    IsWhole( x ) #-->  \code{TRUE} \code{FALSE} \code{TRUE} ...

    # ... These are people who live in ignorance of the Floating Point Gods.
    # These pagans expect ... (Burns, 2011)" the following to be TRUE:
    (.1 - .3 / 3) == 0

    # they might be helped by
    IsZero(.1 - .3 / 3)

[Package DescTools version 0.99.24 Index]