Trait polars::prelude::ChunkUnique

pub trait ChunkUnique<T>
where
    T: PolarsDataType,
{
    // Required methods
    fn unique(&self) -> Result<ChunkedArray<T>, PolarsError>;
    fn arg_unique(&self) -> Result<ChunkedArray<UInt32Type>, PolarsError>;

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

Get unique values in a ChunkedArray

Required Methods

fn unique(&self) -> Result<ChunkedArray<T>, PolarsError>

Get unique values of a ChunkedArray

fn arg_unique(&self) -> Result<ChunkedArray<UInt32Type>, PolarsError>

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

Provided Methods

fn n_unique(&self) -> Result<usize, PolarsError>

Number of unique values in the ChunkedArray

Implementors

impl ChunkUnique<BinaryType> for ChunkedArray<BinaryType>

impl ChunkUnique<BooleanType> for ChunkedArray<BooleanType>

impl ChunkUnique<StringType> for ChunkedArray<StringType>

impl<T> ChunkUnique<ObjectType<T>> for ChunkedArray<ObjectType<T>>

where T: PolarsObject,

Available on crate feature object only.

impl<T> ChunkUnique<T> for ChunkedArray<T>

where T: PolarsNumericType, <T as PolarsNumericType>::Native: TotalHash + TotalEq + ToTotalOrd, <<T as PolarsNumericType>::Native as ToTotalOrd>::TotalOrdItem: Hash + Eq + Ord, ChunkedArray<T>: IntoSeries + for<'a> ChunkCompare<&'a ChunkedArray<T>, Item = ChunkedArray<BooleanType>>,