Struct WeightedChiSquareTerm 

pub struct WeightedChiSquareTerm {
    pub weight: f64,
    pub degrees_of_freedom: f64,
}

One λ_j · χ²_{h_j} term of a linear combination of independent chi-squares, with the weight’s SIGN and the term’s degrees of freedom both carried explicitly.

Two things separate this from the &[f64] weight list weighted_chi_square_sf takes, and each of them is a distribution the one-degree-of-freedom non-negative form cannot express:

• A negative weight makes a RATIO a tail. P(A/B > t) for independent non-negative A, B is P(A − tB > 0), so every F-shaped reference — any statistic whose scale was estimated from the same data — is a signed combination evaluated at zero. The classical F_{a,b} is the two-term case λ = (1, −t·a/b), h = (a, b).
• A multiplicity is not h copies of a weight. It is, mathematically, but the Imhof integrand costs one atan and one ln per TERM, and a residual sum of squares carries n − p unit weights. Folding them into one term with h = n − p is what makes an n-sized reference cost the same as a p-sized one.

Fields

weight: f64

λ_j, of either sign. A zero weight contributes nothing and is dropped.

degrees_of_freedom: f64

h_j > 0. Real rather than integral: a two-moment summary of a spectrum is a chi-square with a fractional shape, and this type is what carries it.

Trait Implementations

impl Clone for WeightedChiSquareTerm

fn clone(&self) -> WeightedChiSquareTerm

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for WeightedChiSquareTerm

impl Debug for WeightedChiSquareTerm

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

Formats the value using the given formatter.

impl PartialEq for WeightedChiSquareTerm

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for WeightedChiSquareTerm