Struct SquaredError 

pub struct SquaredError;

Squared error loss.

Implementations

impl SquaredError

pub const fn new() -> Self

Create a new squared error loss.

pub fn loss(prediction: f64, target: f64) -> f64

Compute 0.5 * (prediction - target)^2.

pub fn gradient(prediction: f64, target: f64) -> f64

Compute the derivative w.r.t. prediction: prediction - target.

pub fn validate(prediction: f64, target: f64) -> Result<(), RillError>

Validate that both prediction and target are finite.

Trait Implementations

impl Clone for SquaredError

fn clone(&self) -> SquaredError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SquaredError

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

Formats the value using the given formatter.

impl Default for SquaredError

fn default() -> SquaredError

Returns the “default value” for a type.