Struct SparseFeature 

pub struct SparseFeature {
    pub indices: Vec<usize>,
    pub values: Vec<Float>,
    pub length: usize,
}

Sparse feature representation

Fields

indices: Vec<usize>

Non-zero indices

values: Vec<Float>

Non-zero values

length: usize

Total length

Implementations

impl SparseFeature

pub fn from_dense(data: &ArrayView1<'_, Float>) -> Self

Create from dense array

pub fn sparsity(&self) -> Float

Compute sparsity ratio

pub fn get(&self, idx: usize) -> Float

Get value at index

Trait Implementations

impl Clone for SparseFeature

fn clone(&self) -> SparseFeature

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SparseFeature

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

Formats the value using the given formatter.