datatable.unique()¶
Find the unique values in all the columns of the frame
.
This function sorts the values in order to find the uniques, so the return values will be ordered. However, this should be considered an implementation detail: in the future datatable may switch to a different algorithm, such as hash-based, which may return the results in a different order.
Parameters¶
frame
Frame
Input frame.
except
NotImplementedError
The exception is raised when one of the frame columns has stype obj64
.
See Also¶
intersect()
– calculate the set intersection of values in the frames.setdiff()
– calculate the set difference between the frames.symdiff()
– calculate the symmetric difference between the sets of values in the frames.union()
– calculate the union of values in the frames.