# is.unsorted

##### Test if an Object is Not Sorted

Test if an object is not sorted (in increasing order), without the cost of sorting it.

- Keywords
- univar

##### Usage

`is.unsorted(x, na.rm = FALSE, strictly = FALSE)`

##### Arguments

- x
an R object with a class or a numeric, complex, character, logical or raw vector.

- na.rm
logical. Should missing values be removed before checking?

- strictly
logical indicating if the check should be for

*strictly*increasing values.

##### Value

A length-one logical value. All objects of length 0 or 1 are sorted.
Otherwise, the result will be `NA`

except for atomic vectors and
objects with an S3 class (where the `>=`

or `>`

method is
used to compare `x[i]`

with `x[i-1]`

for `i`

in
`2:length(x)`

) or with an S4 class where you have to provide a
method for `is.unsorted()`

.

##### Note

This function is designed for objects with one-dimensional indices, as described above. Data frames, matrices and other arrays may give surprising results.

##### See Also

*Documentation reproduced from package base, version 3.5.1, License: Part of R 3.5.1*