Struct RunningStats 

pub struct RunningStats { /* private fields */ }

Online running statistics using Welford’s algorithm.

Computes running mean, population variance, and standard deviation in a numerically stable, single-pass manner.

Implementations

impl RunningStats

pub fn new() -> Self

Create a new empty statistics accumulator.

pub fn update(&mut self, value: f64)

Update with a single observation (Welford’s online algorithm).

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

Update with a batch of observations.

pub fn mean(&self) -> f64

Current running mean.

pub fn var(&self) -> f64

Population variance (divide by n).

pub fn std(&self) -> f64

Population standard deviation.

pub fn normalize(&self, value: f64) -> f64

Normalize a value to a z-score using current mean and std. Returns 0.0 if std is near zero to avoid division by zero.

pub fn count(&self) -> u64

Number of observations seen.

pub fn reset(&mut self)

Reset all accumulated statistics.

Trait Implementations

impl Clone for RunningStats

fn clone(&self) -> RunningStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RunningStats

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

Formats the value using the given formatter.

impl Default for RunningStats

fn default() -> Self

Returns the “default value” for a type.