Struct NpyArray 

pub struct NpyArray {
    pub dtype: NpyDtype,
    pub shape: Vec<usize>,
    pub data_f64: Vec<f64>,
    pub data_f32: Vec<f32>,
    pub data_i32: Vec<i32>,
}

An in-memory NumPy array.

Only one of data_f64, data_f32, or data_i32 is populated, depending on dtype.

Fields

dtype: NpyDtype

Element type.

shape: Vec<usize>

Shape (row-major), e.g. \[3, 2\] for a 3×2 matrix.

data_f64: Vec<f64>

Float64 payload (populated when dtype == Float64).

data_f32: Vec<f32>

Float32 payload (populated when dtype == Float32).

data_i32: Vec<i32>

Int32 payload (populated when dtype == Int32).

Implementations

impl NpyArray

pub fn numel(&self) -> usize

Total number of elements (product of shape dimensions).

pub fn ndim(&self) -> usize

Number of dimensions (length of shape).

pub fn validate(&self) -> Result<(), String>

Validate that the data length matches the shape.

pub fn from_f64(shape: Vec<usize>, data: Vec<f64>) -> Self

Create an NpyArray from f64 data and shape.

pub fn from_f32(shape: Vec<usize>, data: Vec<f32>) -> Self

Create an NpyArray from f32 data and shape.

pub fn from_i32(shape: Vec<usize>, data: Vec<i32>) -> Self

Create an NpyArray from i32 data and shape.

pub fn reshape(&mut self, new_shape: Vec<usize>) -> Result<(), String>

Reshape the array (does not change data, just shape metadata).

impl NpyArray

pub fn save_structured( fields: &[(&str, &str)], n_records: usize, data_bytes: &[u8], ) -> Result<Vec<u8>, String>

Serialize a structured array with named fields to NPY v1.0 bytes.

fields is a slice of (name, dtype_str) pairs, e.g. &\[("x", "<f8"), ("y", "<f8")\]. The data must be already packed in record order (all fields of record 0, then record 1, …).

Returns the NPY bytes suitable for writing to a .npy file.

Trait Implementations

impl Clone for NpyArray

fn clone(&self) -> NpyArray

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NpyArray

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

Formats the value using the given formatter.