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.