Struct WeightedRandomSampler 

pub struct WeightedRandomSampler { /* private fields */ }

Weighted random sampler: draws num_samples indices with probability proportional to weights.

Useful for imbalanced datasets where minority classes should be oversampled.

Implementations

impl WeightedRandomSampler

pub fn new( weights: Vec<f64>, num_samples: usize, seed: u64, ) -> Result<Self, ModelError>

Creates a new weighted sampler.

weights: per-sample weight (higher = more likely to be sampled). num_samples: how many indices to draw per epoch. seed: deterministic random seed.

pub fn indices(&self) -> Vec<usize>

Draw num_samples indices with replacement, proportional to weights.

pub fn num_samples(&self) -> usize

Number of samples drawn per epoch.

Trait Implementations

impl Clone for WeightedRandomSampler

fn clone(&self) -> WeightedRandomSampler

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WeightedRandomSampler

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

Formats the value using the given formatter.