Struct SparseCoefficient 

pub struct SparseCoefficient {
    pub feature_indices: Vec<usize>,
    pub powers: Vec<usize>,
    pub coefficient: Float,
}

Sparse representation of polynomial feature coefficient

Fields

feature_indices: Vec<usize>

Feature indices involved in this term

powers: Vec<usize>

Powers of each feature in this term

coefficient: Float

The coefficient value (typically 1.0 for polynomial features)

Implementations

impl SparseCoefficient

pub fn new( feature_indices: Vec<usize>, powers: Vec<usize>, coefficient: Float, ) -> Self

Create a new sparse coefficient

pub fn evaluate(&self, sample: &Array1<Float>) -> Float

Evaluate this term for a given input sample

pub fn total_degree(&self) -> usize

Get the total degree of this term

pub fn is_interaction(&self) -> bool

Check if this is an interaction term (all powers <= 1)

Trait Implementations

impl Clone for SparseCoefficient

fn clone(&self) -> SparseCoefficient

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SparseCoefficient

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

Formats the value using the given formatter.