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PearsonIv

lindhard::tally::pearson

Struct PearsonIv 

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pub struct PearsonIv {
    pub mean: f64,
    pub std_dev: f64,
    pub skewness: f64,
    pub kurtosis: f64,
    pub m: f64,
    pub nu: f64,
    pub a: f64,
    pub lambda: f64,
    pub log_norm: f64,
}
Expand description

A Pearson type IV density, stored both as the four moments it matches and as Heinrich’s parameters.

Units: mean, std_dev, a and lambda are in the unit of the samples (metres for depth profiles); the rest are dimensionless. log_norm is ln k with k in inverse sample units.

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§mean: f64

Mean (Rp for a depth profile).

§std_dev: f64

Standard deviation (ΔRp).

§skewness: f64

Skewness γ.

§kurtosis: f64

Kurtosis β (not excess).

§m: f64

Shape parameter m > 5/2.

§nu: f64

Asymmetry parameter ν.

§a: f64

Scale a > 0.

§lambda: f64

Location λ.

§log_norm: f64

ln k, the log of the normalisation constant.

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impl PearsonIv

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pub fn from_moments( mean: f64, std_dev: f64, skewness: f64, kurtosis: f64, ) -> Result<Self, PearsonError>

The Pearson IV density with the given mean, standard deviation, skewness and kurtosis (Heinrich 2004). Errors if a moment is not finite, std_dev <= 0, or (γ, β) is outside the type IV region.

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pub fn pdf(&self, x: f64) -> f64

Probability density at x, in inverse sample units.

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impl Clone for PearsonIv

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fn clone(&self) -> PearsonIv

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Copy for PearsonIv

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impl Debug for PearsonIv

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

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for PearsonIv

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl PartialEq for PearsonIv

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

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more
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impl Serialize for PearsonIv

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

Serialize this value into the given Serde serializer. Read more
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impl StructuralPartialEq for PearsonIv

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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