is.unsorted               package:base               R Documentation

Test if an Object is Not Sorted

Description:

     Test if an object is not sorted, without the cost of sorting it.

Usage:

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

Arguments:

       x: an R object with a class or a numeric, complex, character or
          logical 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: the result will be 'NA' for objects of length 2 or more
     except for atomic vectors and objects with a class (where the '>='
     or '>' method is used).

See Also:

     'sort', 'order'.

