polars::prelude

Struct ArrayNameSpace

pub struct ArrayNameSpace(pub Expr);

Available on crate feature lazy only.

Expand description

Specialized expressions for Series of DataType::Array.

Tuple Fields§

§0: Expr

Implementations§

impl ArrayNameSpace

pub fn len(self) -> Expr

Compute the length of every subarray.

pub fn max(self) -> Expr

Compute the maximum of the items in every subarray.

pub fn min(self) -> Expr

Compute the minimum of the items in every subarray.

pub fn sum(self) -> Expr

Compute the sum of the items in every subarray.

pub fn std(self, ddof: u8) -> Expr

Compute the std of the items in every subarray.

pub fn var(self, ddof: u8) -> Expr

Compute the var of the items in every subarray.

pub fn mean(self) -> Expr

Compute the mean of the items in every subarray.

pub fn median(self) -> Expr

Compute the median of the items in every subarray.

pub fn unique(self) -> Expr

Keep only the unique values in every sub-array.

pub fn unique_stable(self) -> Expr

Keep only the unique values in every sub-array.

pub fn n_unique(self) -> Expr

pub fn to_list(self) -> Expr

Cast the Array column to List column with the same inner data type.

pub fn sort(self, options: SortOptions) -> Expr

pub fn reverse(self) -> Expr

pub fn arg_min(self) -> Expr

pub fn arg_max(self) -> Expr

pub fn get(self, index: Expr, null_on_oob: bool) -> Expr

Get items in every sub-array by index.

pub fn join(self, separator: Expr, ignore_nulls: bool) -> Expr

Join all string items in a sub-array and place a separator between them.

§Error

Raise if inner type of array is not DataType::String.

pub fn contains<E>(self, other: E, nulls_equal: bool) -> Expr
where E: Into<Expr>,

Check if the sub-array contains specific element

pub fn slice( self, offset: Expr, length: Expr, as_array: bool, ) -> Result<Expr, PolarsError>

Slice every subarray.

pub fn head(self, n: Expr, as_array: bool) -> Result<Expr, PolarsError>

Get the head of every subarray

pub fn tail(self, n: Expr, as_array: bool) -> Result<Expr, PolarsError>

Get the tail of every subarray

pub fn shift(self, n: Expr) -> Expr

Shift every sub-array.

pub fn explode(self) -> Expr

Returns a column with a separate row for every array element.

Auto Trait Implementations§

impl !Freeze for ArrayNameSpace

impl !RefUnwindSafe for ArrayNameSpace

impl Send for ArrayNameSpace

impl Sync for ArrayNameSpace

impl Unpin for ArrayNameSpace

impl !UnwindSafe for ArrayNameSpace

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

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Returns the argument unchanged.

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Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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const ALIGN: usize

The alignment of pointer.

type Init = T

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unsafe fn init(init: <T as Pointable>::Init) -> usize

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unsafe fn drop(ptr: usize)

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where T: ?Sized,

fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns [Action::Follow] only if self and other return Action::Follow. Read more

fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns [Action::Follow] if either self or other returns Action::Follow. Read more

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