Struct ExponentialDecayLR 

pub struct ExponentialDecayLR { /* private fields */ }

Available on crate feature alloc only.

Multiplicative exponential decay: lr = initial_lr * gamma^step.

The rate is floored at 1e-8 to prevent numerical underflow that would effectively freeze learning. For a half-life of h steps, set gamma = 0.5^(1/h).

Example

use irithyll::ensemble::lr_schedule::{LRScheduler, ExponentialDecayLR};

let mut sched = ExponentialDecayLR::new(1.0, 0.9);
assert!(crate::math::abs((sched.learning_rate(0, 0.0) - 1.0)) < 1e-12);
assert!(crate::math::abs((sched.learning_rate(1, 0.0) - 0.9)) < 1e-12);
assert!(crate::math::abs((sched.learning_rate(2, 0.0) - 0.81)) < 1e-12);

Implementations

impl ExponentialDecayLR

pub fn new(initial_lr: f64, gamma: f64) -> Self

Create an exponential-decay scheduler.

Arguments

• initial_lr – Rate at step 0.
• gamma – Multiplicative decay factor applied each step.

Trait Implementations

impl Clone for ExponentialDecayLR

fn clone(&self) -> ExponentialDecayLR

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExponentialDecayLR

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

Formats the value using the given formatter.

impl LRScheduler for ExponentialDecayLR

fn learning_rate(&mut self, step: u64, _current_loss: f64) -> f64

Return the learning rate for the given step and current_loss.

fn reset(&mut self)

Reset the scheduler to its initial state.