Struct PolynomialFeatures 

pub struct PolynomialFeatures {
    pub degree: usize,
    pub interaction_only: bool,
}

Generates polynomial and interaction features.

For a feature vector [a, b] and degree=2:

• interaction_only=false: [1, a, b, a^2, ab, b^2]
• interaction_only=true: [1, a, b, ab]

Implements FitUnsupervised for pipeline compatibility. The fit step only records the number of input features; all computation happens in transform.

Fields

degree: usize

Maximum degree of polynomial features.

interaction_only: bool

If true, only produce interaction features (no x_i^k for k > 1).

Implementations

impl PolynomialFeatures

pub fn new() -> Self

Create a new PolynomialFeatures with default degree 2 and interaction_only = false.

pub fn with_degree(self, degree: usize) -> Self

Set the maximum polynomial degree.

pub fn with_interaction_only(self, interaction_only: bool) -> Self

Set whether to produce only interaction features.

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.

impl Default for PolynomialFeatures

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for PolynomialFeatures

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<F: Float> FitUnsupervised<F> for PolynomialFeatures

type Fitted = FittedPolynomialFeatures<F>

fn fit(&self, x: &Array2<F>) -> Result<Self::Fitted>

impl Serialize for PolynomialFeatures

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.