Trait polars_core::chunked_array::ops::ChunkUnique

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

    fn n_unique(&self) -> PolarsResult<usize> { ... }
    fn is_unique(&self) -> PolarsResult<BooleanChunked> { ... }
    fn is_duplicated(&self) -> PolarsResult<BooleanChunked> { ... }
    fn mode(&self) -> PolarsResult<ChunkedArray<T>> { ... }
}

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

Examples found in repository

src/series/implementations/boolean.rs (line 282)

    fn n_unique(&self) -> PolarsResult<usize> {
        ChunkUnique::n_unique(&self.0)
    }

src/series/implementations/object.rs (line 193)

    fn n_unique(&self) -> PolarsResult<usize> {
        ChunkUnique::n_unique(&self.0)
    }

src/series/implementations/utf8.rs (line 268)

    fn n_unique(&self) -> PolarsResult<usize> {
        ChunkUnique::n_unique(&self.0)
    }

src/chunked_array/logical/categorical/ops/unique.rs (line 41)

    pub fn n_unique(&self) -> PolarsResult<usize> {
        if self.can_fast_unique() {
            Ok(self.get_rev_map().len())
        } else {
            self.logical().n_unique()
        }
    }

fn is_unique(&self) -> PolarsResult<BooleanChunked>

Get a mask of all the unique values.

Examples found in repository

src/series/implementations/categorical.rs (line 335)

    fn is_unique(&self) -> PolarsResult<BooleanChunked> {
        self.0.logical().is_unique()
    }

src/series/implementations/boolean.rs (line 306)

    fn is_unique(&self) -> PolarsResult<BooleanChunked> {
        ChunkUnique::is_unique(&self.0)
    }

src/series/implementations/object.rs (line 209)

    fn is_unique(&self) -> PolarsResult<BooleanChunked> {
        ChunkUnique::is_unique(&self.0)
    }

src/series/implementations/utf8.rs (line 292)

    fn is_unique(&self) -> PolarsResult<BooleanChunked> {
        ChunkUnique::is_unique(&self.0)
    }

src/chunked_array/ops/unique/mod.rs (line 400)

    fn is_unique(&self) -> PolarsResult<BooleanChunked> {
        self.bit_repr_small().is_unique()
    }
    fn is_duplicated(&self) -> PolarsResult<BooleanChunked> {
        self.bit_repr_small().is_duplicated()
    }
}

impl ChunkUnique<Float64Type> for Float64Chunked {
    fn unique(&self) -> PolarsResult<ChunkedArray<Float64Type>> {
        let ca = self.bit_repr_large();
        let ca = ca.unique()?;
        Ok(ca._reinterpret_float())
    }

    fn arg_unique(&self) -> PolarsResult<IdxCa> {
        self.bit_repr_large().arg_unique()
    }

    fn is_unique(&self) -> PolarsResult<BooleanChunked> {
        self.bit_repr_large().is_unique()
    }

fn is_duplicated(&self) -> PolarsResult<BooleanChunked>

Get a mask of all the duplicated values.

Examples found in repository

src/series/implementations/categorical.rs (line 339)

    fn is_duplicated(&self) -> PolarsResult<BooleanChunked> {
        self.0.logical().is_duplicated()
    }

src/series/implementations/boolean.rs (line 310)

    fn is_duplicated(&self) -> PolarsResult<BooleanChunked> {
        ChunkUnique::is_duplicated(&self.0)
    }

src/series/implementations/object.rs (line 213)

    fn is_duplicated(&self) -> PolarsResult<BooleanChunked> {
        ChunkUnique::is_duplicated(&self.0)
    }

src/series/implementations/utf8.rs (line 296)

    fn is_duplicated(&self) -> PolarsResult<BooleanChunked> {
        ChunkUnique::is_duplicated(&self.0)
    }

src/chunked_array/ops/unique/mod.rs (line 403)

    fn is_duplicated(&self) -> PolarsResult<BooleanChunked> {
        self.bit_repr_small().is_duplicated()
    }
}

impl ChunkUnique<Float64Type> for Float64Chunked {
    fn unique(&self) -> PolarsResult<ChunkedArray<Float64Type>> {
        let ca = self.bit_repr_large();
        let ca = ca.unique()?;
        Ok(ca._reinterpret_float())
    }

    fn arg_unique(&self) -> PolarsResult<IdxCa> {
        self.bit_repr_large().arg_unique()
    }

    fn is_unique(&self) -> PolarsResult<BooleanChunked> {
        self.bit_repr_large().is_unique()
    }
    fn is_duplicated(&self) -> PolarsResult<BooleanChunked> {
        self.bit_repr_large().is_duplicated()
    }

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

Available on crate feature mode only.

The most occurring value(s). Can return multiple Values

Examples found in repository

src/series/implementations/boolean.rs (line 388)

    fn mode(&self) -> PolarsResult<Series> {
        Ok(self.0.mode()?.into_series())
    }

src/series/implementations/utf8.rs (line 347)

    fn mode(&self) -> PolarsResult<Series> {
        Ok(self.0.mode()?.into_series())
    }

Implementors

impl ChunkUnique<BooleanType> for BooleanChunked

impl ChunkUnique<Float32Type> for Float32Chunked

impl ChunkUnique<Float64Type> for Float64Chunked

impl ChunkUnique<Utf8Type> for Utf8Chunked

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

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