Struct L2Regularization 

pub struct L2Regularization {
    pub alpha: Float,
}

L2 (Ridge) regularization: α/2 * ||w||²₂

Fields

alpha: Float

Regularization strength

Implementations

impl L2Regularization

pub fn new(alpha: Float) -> Result<Self>

Create a new L2 regularization with the specified strength

Trait Implementations

impl Clone for L2Regularization

fn clone(&self) -> L2Regularization

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for L2Regularization

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

Formats the value using the given formatter.

impl Regularization for L2Regularization

fn penalty(&self, coefficients: &Array1<Float>) -> Result<Float>

Compute the regularization penalty value

fn penalty_gradient( &self, coefficients: &Array1<Float>, ) -> Result<Array1<Float>>

Compute the regularization gradient (subgradient for non-smooth penalties)

fn proximal_operator( &self, coefficients: &Array1<Float>, step_size: Float, ) -> Result<Array1<Float>>

Apply the proximal operator (for proximal gradient methods)

fn strength(&self) -> Float

Get the regularization strength

fn name(&self) -> &'static str

Get the name of this regularization

fn is_non_smooth(&self) -> bool

Check if this regularization is non-smooth (requires proximal methods)