Struct stats::OnlineStats

pub struct OnlineStats { /* fields omitted */ }

Online state for computing mean, variance and standard deviation.

Methods

impl OnlineStats

pub fn new() -> OnlineStats

Create initial state.

Population size, variance and mean are set to 0.

pub fn from_slice<T: ToPrimitive>(samples: &[T]) -> OnlineStats

Initializes variance from a sample.

pub fn mean(&self) -> f64

Return the current mean.

pub fn stddev(&self) -> f64

Return the current standard deviation.

pub fn variance(&self) -> f64

Return the current variance.

pub fn add<T: ToPrimitive>(&mut self, sample: T)

Add a new sample.

pub fn add_null(&mut self)

Add a new NULL value to the population.

This increases the population size by 1.

pub fn len(&self) -> usize

Returns the number of data points.

Trait Implementations

impl Clone for OnlineStats

fn clone(&self) -> OnlineStats

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for OnlineStats

impl Commute for OnlineStats

fn merge(&mut self, v: OnlineStats)

Merges the value other into self.

fn consume<I: Iterator<Item = Self>>(&mut self, other: I)

Merges the values in the iterator into self.

impl Default for OnlineStats

fn default() -> OnlineStats

Returns the "default value" for a type.

impl Debug for OnlineStats

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

Formats the value using the given formatter.

impl<T: ToPrimitive> FromIterator<T> for OnlineStats

fn from_iter<I: IntoIterator<Item = T>>(it: I) -> OnlineStats

Creates a value from an iterator.

impl<T: ToPrimitive> Extend<T> for OnlineStats

fn extend<I: IntoIterator<Item = T>>(&mut self, it: I)

Extends a collection with the contents of an iterator.