Enum ColumnView 

pub enum ColumnView<'a> {
    Float(ArrayBase<ViewRepr<&'a f64>, Dim<IxDynImpl>>),
    Int(ArrayBase<ViewRepr<&'a i32>, Dim<IxDynImpl>>),
    Bool(ArrayBase<ViewRepr<&'a bool>, Dim<IxDynImpl>>),
    UInt(ArrayBase<ViewRepr<&'a u32>, Dim<IxDynImpl>>),
    U8(ArrayBase<ViewRepr<&'a u8>, Dim<IxDynImpl>>),
    String(ArrayBase<ViewRepr<&'a String>, Dim<IxDynImpl>>),
}

A borrowed, read-only view of a Column.

Each variant holds an ArrayViewD that borrows from the corresponding ArrayD inside an owned Column. No data is copied.

Variants

Float(ArrayBase<ViewRepr<&'a f64>, Dim<IxDynImpl>>)

Borrowed float column.

Int(ArrayBase<ViewRepr<&'a i32>, Dim<IxDynImpl>>)

Borrowed signed integer column.

Bool(ArrayBase<ViewRepr<&'a bool>, Dim<IxDynImpl>>)

Borrowed boolean column.

UInt(ArrayBase<ViewRepr<&'a u32>, Dim<IxDynImpl>>)

Borrowed unsigned integer column.

U8(ArrayBase<ViewRepr<&'a u8>, Dim<IxDynImpl>>)

Borrowed u8 column.

String(ArrayBase<ViewRepr<&'a String>, Dim<IxDynImpl>>)

Borrowed string column.

Implementations

impl<'a> ColumnView<'a>

pub fn nrows(&self) -> Option<usize>

Returns the number of rows (axis-0 length) of this column view.

Returns None if the array has rank 0.

pub fn dtype(&self) -> DType

Returns the data type of this column view.

pub fn shape(&self) -> &[usize]

Returns the shape of the underlying array view.

pub fn as_float(&self) -> Option<ArrayBase<ViewRepr<&'a f64>, Dim<IxDynImpl>>>

Returns a view of the float data, or None if this column view is not Float.

pub fn as_int(&self) -> Option<ArrayBase<ViewRepr<&'a i32>, Dim<IxDynImpl>>>

Returns a view of the integer data, or None if not Int.

pub fn as_bool(&self) -> Option<ArrayBase<ViewRepr<&'a bool>, Dim<IxDynImpl>>>

Returns a view of the boolean data, or None if not Bool.

pub fn as_uint(&self) -> Option<ArrayBase<ViewRepr<&'a u32>, Dim<IxDynImpl>>>

Returns a view of the unsigned integer data, or None if not UInt.

pub fn as_u8(&self) -> Option<ArrayBase<ViewRepr<&'a u8>, Dim<IxDynImpl>>>

Returns a view of the u8 data, or None if not U8.

pub fn as_string( &self, ) -> Option<ArrayBase<ViewRepr<&'a String>, Dim<IxDynImpl>>>

Returns a view of the string data, or None if not String.

pub fn to_owned(&self) -> Column

Creates an owned Column by cloning the viewed data.

Trait Implementations

impl ColumnAccess for ColumnView<'_>

fn as_float_view(&self) -> Option<ArrayBase<ViewRepr<&f64>, Dim<IxDynImpl>>>

Returns a float array view, or None if the column is not Float.

fn as_int_view(&self) -> Option<ArrayBase<ViewRepr<&i32>, Dim<IxDynImpl>>>

Returns an int array view, or None if the column is not Int.

fn as_bool_view(&self) -> Option<ArrayBase<ViewRepr<&bool>, Dim<IxDynImpl>>>

Returns a bool array view, or None if the column is not Bool.

fn as_uint_view(&self) -> Option<ArrayBase<ViewRepr<&u32>, Dim<IxDynImpl>>>

Returns a uint array view, or None if the column is not UInt.

fn as_u8_view(&self) -> Option<ArrayBase<ViewRepr<&u8>, Dim<IxDynImpl>>>

Returns a u8 array view, or None if the column is not U8.

fn as_string_view(&self) -> Option<ArrayBase<ViewRepr<&String>, Dim<IxDynImpl>>>

Returns a string array view, or None if the column is not String.

fn nrows(&self) -> Option<usize>

Returns the number of rows (axis-0 length), or None if rank 0.

fn dtype(&self) -> DType

Returns the data type of this column.

fn shape(&self) -> Vec<usize>

Returns the shape of the underlying array as an owned Vec.

impl Debug for ColumnView<'_>

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'a> From<&'a Column> for ColumnView<'a>

fn from(col: &'a Column) -> ColumnView<'a>

Converts to this type from the input type.