Struct MmapNpyArray2F32 

pub struct MmapNpyArray2F32 { /* private fields */ }

Memory-mapped NPY array for f32 values (used for centroids).

This struct provides zero-copy access to 2D f32 arrays stored in NPY format. Unlike loading into an owned Array2<f32>, this approach lets the OS manage paging, reducing resident memory usage for large centroid matrices.

Implementations

impl MmapNpyArray2F32

pub fn from_npy_file(path: &Path) -> Result<Self>

Load a 2D f32 array from an NPY file.

pub fn shape(&self) -> (usize, usize)

Get the shape of the array.

pub fn nrows(&self) -> usize

Get the number of rows.

pub fn ncols(&self) -> usize

Get the number of columns.

pub fn view(&self) -> ArrayView2<'_, f32>

Get a view of the entire array as ArrayView2.

This provides zero-copy access to the memory-mapped data.

pub fn row(&self, idx: usize) -> ArrayView1<'_, f32>

Get a view of a single row.

pub fn slice_rows(&self, start: usize, end: usize) -> ArrayView2<'_, f32>

Get a view of rows [start..end] as ArrayView2.

pub fn to_owned(&self) -> Array2<f32>

Convert to an owned Array2 (loads all data into memory).

Use this only when you need an owned copy; prefer view() for read-only access.