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

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 0.99.54 Index]