Struct EarlyStoppingMonitor 

pub struct EarlyStoppingMonitor { /* private fields */ }

The early stopping monitor.

Tracks a single metric over epochs and decides when to stop training based on patience, minimum delta, baseline, and minimum epoch constraints.

Implementations

impl EarlyStoppingMonitor

pub fn new(config: EarlyStoppingConfig) -> Self

Create a new monitor with the given configuration.

pub fn with_default() -> Self

Create a new monitor with default configuration.

pub fn step(&mut self, metric_value: f64) -> EarlyStoppingDecision

Report the metric for the current epoch and return a decision.

This advances the epoch counter, records the metric value, and evaluates whether training should continue or stop.

pub fn should_stop(&self) -> bool

Check if training should stop (without advancing epoch).

pub fn best_value(&self) -> Option<f64>

Best metric value seen so far.

pub fn best_epoch(&self) -> usize

Epoch at which the best value was seen.

pub fn current_epoch(&self) -> usize

Current epoch number.

pub fn epochs_since_improvement(&self) -> usize

Number of epochs since last improvement.

pub fn history(&self) -> &[f64]

Full metric history.

pub fn reset(&mut self)

Reset the monitor to its initial state.

pub fn summary(&self) -> String

Return a human-readable summary of the monitor’s current state.

Trait Implementations

impl Clone for EarlyStoppingMonitor

fn clone(&self) -> EarlyStoppingMonitor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EarlyStoppingMonitor

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

Formats the value using the given formatter.