| is.unsorted {base} | R Documentation |
Test if an object is not sorted, without the cost of sorting it.
is.unsorted(x, na.rm = FALSE, strictly = FALSE)
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. |
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 to compare x[i] with x[i-1] for
i in 2:length(x)).
This function is designed for objects with one-dimensional indices, as described above. Dataframes, matrices and other arrays may give surprising results.