Struct WelfordAccumulator 

pub struct WelfordAccumulator { /* private fields */ }

Incremental statistics computation for streaming data processing.

This module provides bounded-memory statistical computation using:

• Welford’s algorithm for numerically stable variance/stddev (O(1) memory)
• HyperLogLog for approximate distinct counts (~16 KB fixed registers)
• Reservoir sampling for unbiased samples (fixed capacity; total memory depends on the capacity and the length of sampled strings)
• Streaming text-length tracking with min/max/mean/histogram (O(1) memory)

Implementations

impl WelfordAccumulator

pub fn new() -> Self

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

pub fn mean(&self) -> f64

pub fn variance(&self) -> f64

pub fn std_dev(&self) -> f64

pub fn merge(&mut self, other: &WelfordAccumulator)

Trait Implementations

impl Clone for WelfordAccumulator

fn clone(&self) -> WelfordAccumulator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WelfordAccumulator

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

Formats the value using the given formatter.

impl Default for WelfordAccumulator

fn default() -> Self

Returns the “default value” for a type.