Enum VarianceConvention 

pub enum VarianceConvention {
    Population,
    Sample,
}

Which divisor the band standard deviation uses.

The window is the full population of the lookback in one reading and a sample drawn from an unobserved wider distribution in the other; neither is a correction of the other, so the choice belongs to the caller.

Variants

Population

Divisor N. The default, and the historical behaviour of this indicator.

Sample

Divisor N - 1 (Bessel-corrected), which requires N >= 2. At N = 20 this widens the distance between basis and band by sqrt(20/19), roughly 2.6% — the band values themselves do not scale by that factor, since the basis is unaffected.

Trait Implementations

impl Clone for VarianceConvention

fn clone(&self) -> VarianceConvention

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for VarianceConvention

impl Debug for VarianceConvention

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

Formats the value using the given formatter.

impl Default for VarianceConvention

fn default() -> VarianceConvention

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for VarianceConvention

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for VarianceConvention

impl PartialEq for VarianceConvention

fn eq(&self, other: &VarianceConvention) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for VarianceConvention

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for VarianceConvention