Struct RunningStatsVec 

pub struct RunningStatsVec { /* private fields */ }

Per-dimension online running statistics using Welford’s algorithm.

Maintains independent mean/variance accumulators for each dimension, enabling proper per-feature observation normalization as in SB3’s RunningMeanStd.

Implementations

impl RunningStatsVec

pub fn new(dim: usize) -> Self

Create a new accumulator for vectors of the given dimensionality.

pub fn update(&mut self, values: &[f64])

Update with a single sample of length dim (Welford per dimension).

Panics

Panics if values.len() != dim.

pub fn batch_update(&mut self, data: &[f64], batch_size: usize)

Update with a flat batch of batch_size samples, each of dim dimensions.

data must have length batch_size * dim, laid out as [sample0_dim0, sample0_dim1, ..., sample1_dim0, ...].

Panics

Panics if data.len() != batch_size * dim.

pub fn mean(&self) -> Vec<f64>

Return the current per-dimension mean vector (clone).

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

Borrow the per-dimension mean as a slice (zero-cost).

pub fn var(&self) -> Vec<f64>

Return the per-dimension population variance vector.

pub fn std(&self) -> Vec<f64>

Return the per-dimension population standard deviation vector.

pub fn normalize(&self, values: &[f64]) -> Vec<f64>

Normalize a single sample: (values - mean) / max(std, 1e-8) per dimension.

Panics

Panics if values.len() != dim.

pub fn normalize_batch(&self, data: &[f64], batch_size: usize) -> Vec<f64>

Normalize a flat batch of batch_size samples.

Panics

Panics if data.len() != batch_size * dim.

pub fn count(&self) -> u64

Number of samples seen so far.

pub fn dim(&self) -> usize

Dimensionality of the tracked vectors.

pub fn reset(&mut self)

Reset all accumulated statistics, keeping the dimensionality.

Trait Implementations

impl Clone for RunningStatsVec

fn clone(&self) -> RunningStatsVec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RunningStatsVec

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

Formats the value using the given formatter.