Struct ArrayNameSpace 

pub struct ArrayNameSpace(pub Expr);

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 dot(self, other: Expr) -> Expr

Compute the row-wise dot product with another equal-width float array expression.

Both arrays are cast to a common supertype, which must be Float32 or Float64. Pairs containing an inner null do not contribute to the sum. An outer null row produces a null.

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 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 arg_min(self) -> Expr

Retrieve an index of a minimal value in every sub-array.

In the case of a tie, this may return the index of any of the minimum values.

pub fn arg_max(self) -> Expr

Retrieve the index of the maximal value in every sub-array.

In the case of a tie, this may return the index of any of the maximum values.

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>,

Available on crate feature is_in only.

Check if the sub-array contains specific element

pub fn count_matches<E>(self, element: E) -> Expr

where E: Into<Expr>,

Available on crate feature array_count only.

Count how often the value produced by element occurs.

pub fn to_struct( self, name_generator: Option<PlanCallback<usize, String>>, ) -> Expr

Available on crate feature array_to_struct only.

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, options: ExplodeOptions) -> Expr

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

pub fn eval<E>(self, other: E, as_list: bool) -> Expr

where E: Into<Expr>,

pub fn agg<E>(self, other: E) -> Expr

where E: Into<Expr>,