Struct StandardDeviationState 

pub struct StandardDeviationState {
    pub count: u64,
    pub sum: f64,
    pub sum_squared: f64,
    pub mean: f64,
}

State for the standard deviation analyzer.

Fields

count: u64

Count of non-null values.

sum: f64

Sum of values.

sum_squared: f64

Sum of squared values.

mean: f64

Mean value.

Implementations

impl StandardDeviationState

pub fn population_std_dev(&self) -> Option<f64>

Calculates the population standard deviation.

pub fn sample_std_dev(&self) -> Option<f64>

Calculates the sample standard deviation.

pub fn population_variance(&self) -> Option<f64>

Calculates the population variance.

pub fn sample_variance(&self) -> Option<f64>

Calculates the sample variance.

pub fn coefficient_of_variation(&self) -> Option<f64>

Calculates the coefficient of variation (CV).

Trait Implementations

impl AnalyzerState for StandardDeviationState

fn merge(states: Vec<Self>) -> AnalyzerResult<Self>

Merges multiple states into a single state.

fn is_empty(&self) -> bool

Returns whether this state represents an empty computation.

impl Clone for StandardDeviationState

fn clone(&self) -> StandardDeviationState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StandardDeviationState

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for StandardDeviationState

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for StandardDeviationState

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.