R: Is Object Numeric and Whole Numbers

is.wholenumber {DistributionUtils} | R Documentation

## Is Object Numeric and Whole Numbers

### Description

Checks whether an object is numeric and if so, are all the elements whole numbers, to a given tolerance.

### Usage

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

### Arguments

`x` | The object to be tested.
`tolerance` | Numeric >=0. Absolute differences greater than `tolerance` are treated as real differences.

### Details

The object `x` is first tested to see if it is numeric. If not the function returns `'FALSE'`. Then if all the elements of `x` are whole numbers to within the tolerance given by `tolerance` the function returns `'TRUE'`. If not it returns `'FALSE'`.

### Value

Either `'TRUE'` or `'FALSE'` depending on the result of the test.

### Author(s)

David Scott d.scott@auckland.ac.nz.

### References

Based on a post by Tony Plate <tplate@acm.org> on R-help.

### Examples

    is.wholenumber(-3:5)                           # TRUE
    is.wholenumber(c(0,0.1,1.3,5))                 # FALSE
    is.wholenumber(-3:5 + .Machine$double.eps)     # TRUE
    is.wholenumber(-3:5 + .Machine$double.eps^0.5) # FALSE
    is.wholenumber(c(2L,3L))                       # TRUE
    is.wholenumber(c("2L","3L"))                   # FALSE
    is.wholenumber(0i ^ (-3:3))                    # FALSE
    is.wholenumber(matrix(1:6, nrow = 3))          # TRUE
    is.wholenumber(list(-1:3,2:6))                 # FALSE
    is.numeric(list(-1:3,2:6))                     # FALSE
    is.wholenumber(unlist(list(-1:3,2:6)))         # TRUE

[Package DistributionUtils version 0.6-0 Index]