Struct RollingVariance 

pub struct RollingVariance { /* private fields */ }

Sliding-window accumulator for population mean/variance.

Implementations

impl RollingVariance

pub fn new(period: usize) -> Self

pub fn len(&self) -> usize

Number of samples currently in the window.

pub fn is_empty(&self) -> bool

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

Window contents, oldest first.

pub fn iter(&self) -> impl Iterator<Item = &f64>

pub fn push(&mut self, v: f64) -> bool

Push a sample, evicting the oldest once the window is full.

Returns true once the window holds a full period samples.

pub fn sum(&self) -> f64

Sum of the window’s raw values.

Reconstructed from the shifted accumulator, so it carries the same (small) error as the accumulator itself rather than an independently drifting Σx.

pub fn mean(&self) -> f64

Window mean (population), or NaN for an empty window.

pub fn variance(&self) -> f64

Population variance over the current window, clamped at zero.

pub fn stddev(&self) -> f64

Population standard deviation over the current window.

Trait Implementations

impl Clone for RollingVariance

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RollingVariance

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

Formats the value using the given formatter.