Struct EarlyStopping 

pub struct EarlyStopping { /* private fields */ }

Early stopping to halt training when a metric stops improving.

Implementations

impl EarlyStopping

pub fn new(patience: usize, min_delta: f32, mode: MonitorMode) -> Self

Create a new early stopping monitor.

• patience: number of epochs without improvement before stopping.
• min_delta: minimum change to qualify as an improvement.
• mode: whether lower or higher metric values are better.

pub fn check(&mut self, value: f32) -> bool

Check if training should stop. Call once per epoch with the monitored metric.

Returns true when the patience has been exhausted (training should stop).

pub fn stopped(&self) -> bool

Whether stop was triggered.

pub fn best_value(&self) -> f32

Best value seen so far.

pub fn counter(&self) -> usize

Number of epochs without improvement.

pub fn reset(&mut self)

Reset state for a new training run.

impl EarlyStopping

pub fn with_monitor(self, key: impl Into<String>) -> Self

Set the metric key to monitor (default: "loss").

Trait Implementations

impl Clone for EarlyStopping

fn clone(&self) -> EarlyStopping

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EarlyStopping

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

Formats the value using the given formatter.

impl TrainingCallback for EarlyStopping

fn on_epoch_end( &mut self, _epoch: usize, metrics: &HashMap<String, f32>, ) -> bool

Called after each epoch. Returns true if training should stop.

fn on_batch_end(&mut self, _epoch: usize, _batch: usize, _loss: f32)

Called after each batch within an epoch. Default implementation does nothing.