Trait polars_core::chunked_array::ops::ChunkUnique

pub trait ChunkUnique<T: PolarsDataType> {
    // Required methods
    fn unique(&self) -> PolarsResult<ChunkedArray<T>>;
    fn arg_unique(&self) -> PolarsResult<IdxCa>;

    // Provided method
    fn n_unique(&self) -> PolarsResult<usize> { ... }
}

Get unique values in a ChunkedArray

Required Methods

fn unique(&self) -> PolarsResult<ChunkedArray<T>>

Get unique values of a ChunkedArray

fn arg_unique(&self) -> PolarsResult<IdxCa>

Get first index of the unique values in a ChunkedArray. This Vec is sorted.

Provided Methods

fn n_unique(&self) -> PolarsResult<usize>

Number of unique values in the ChunkedArray

Implementors

impl ChunkUnique<BinaryType> for BinaryChunked

Available on crate feature algorithm_group_by only.

impl ChunkUnique<BooleanType> for BooleanChunked

Available on crate feature algorithm_group_by only.

impl ChunkUnique<Float32Type> for Float32Chunked

Available on crate feature algorithm_group_by only.

impl ChunkUnique<Float64Type> for Float64Chunked

Available on crate feature algorithm_group_by only.

impl ChunkUnique<Utf8Type> for Utf8Chunked

Available on crate feature algorithm_group_by only.

impl<T> ChunkUnique<T> for ChunkedArray<T>where T: PolarsIntegerType, T::Native: Hash + Eq + Ord, ChunkedArray<T>: IntoSeries,

Available on crate feature algorithm_group_by only.

impl<T: PolarsObject> ChunkUnique<ObjectType<T>> for ObjectChunked<T>

Available on crate features algorithm_group_by and object only.