Struct PolynomialFeatures 

pub struct PolynomialFeatures { /* private fields */ }

Polynomial feature generator

Generates polynomial and interaction features from input data. For example, with degree=2 and features [a, b], generates: [1, a, b, a², ab, b²]

Implementations

impl PolynomialFeatures

pub fn new( degree: usize, include_bias: bool, interaction_only: bool, ) -> UtilsResult<Self>

Create a new polynomial feature generator

Arguments

• degree - Maximum degree of polynomial features
• include_bias - Whether to include a bias column (constant 1.0)
• interaction_only - If true, only interaction features (no powers of single features)

pub fn n_output_features(&self, n_features: usize) -> usize

Compute the number of output features

Arguments

• n_features - Number of input features

Returns

Number of output features after transformation

pub fn transform(&self, x: &Array2<f64>) -> UtilsResult<Array2<f64>>

Transform features to polynomial features

Arguments

• x - Input features (n_samples × n_features)

Returns

Transformed features with polynomial terms

Trait Implementations

impl Clone for PolynomialFeatures

fn clone(&self) -> PolynomialFeatures

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PolynomialFeatures

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

Formats the value using the given formatter.