Struct Ndarray 

pub struct Ndarray {
    pub source: Source,
    pub shape: Vec<Option<u64>>,
    pub datatype: Datatype,
    pub byteorder: ByteOrder,
    pub offset: u64,
    pub strides: Option<Vec<i64>>,
    pub mask: Option<Mask>,
}

A parsed core/ndarray.

Fields

source: Source

Where the data lives.

shape: Vec<Option<u64>>

The array’s shape. A leading None means the dimension is determined from the block’s size, which the schema allows for streamed arrays.

datatype: Datatype

The element type.

byteorder: ByteOrder

Byte order of the elements.

offset: u64

Offset in bytes into the block where the data starts.

strides: Option<Vec<i64>>

Bytes to step per dimension. Absent means C-contiguous.

mask: Option<Mask>

How missing values are marked, if at all.

Implementations

impl Ndarray

pub fn parse(doc: &Document, id: NodeId) -> Result<Self>

Parse an ndarray from a tree node.

pub fn resolved_shape(&self, block_bytes: Option<u64>) -> Result<Vec<u64>>

The shape with every dimension known, given the block’s byte length.

A streamed array’s first dimension is * in the file and is derived from how many whole rows the block holds.

pub fn len(&self, block_bytes: Option<u64>) -> Result<u64>

The number of elements, for a fully-known shape.

pub fn is_empty(&self, block_bytes: Option<u64>) -> Result<bool>

Whether the array has no elements.

pub fn nbytes(&self, block_bytes: Option<u64>) -> Result<u64>

The number of bytes the elements occupy.

pub fn c_strides(shape: &[u64], item_size: u64) -> Vec<i64>

C-contiguous strides for a shape, in bytes.

Trait Implementations

impl Clone for Ndarray

fn clone(&self) -> Ndarray

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Ndarray

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

Formats the value using the given formatter.

impl PartialEq for Ndarray

fn eq(&self, other: &Ndarray) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Ndarray