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RowLogLikDerivs

gam_inference::higher_order

Struct RowLogLikDerivs 

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pub struct RowLogLikDerivs {
    pub d1: f64,
    pub d2: f64,
    pub d3: f64,
    pub d4: f64,
}
Expand description

Per-row log-likelihood derivatives in the row’s linear-predictor η, for a single-predictor (K = 1) GLM-type family: ℓ'ᵢ, ℓ''ᵢ, ℓ'''ᵢ, ℓ''''ᵢ.

These are exactly the diagonal channels of the K = 1 #932 row tower (gam_math::jet_tower::Tower4): the tower carries the row negative log-likelihood, so ℓ⁽ᵏ⁾ᵢ = −towerᵢ.derivative_k. row_derivs_from_nll_tower performs that sign flip; constructing this struct directly lets callers feed closed-form derivatives (e.g. the Gaussian fixture) without a tower.

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§d1: f64

ℓ'ᵢ = ∂ℓᵢ/∂ηᵢ (the score contribution).

§d2: f64

ℓ''ᵢ = ∂²ℓᵢ/∂ηᵢ² (≤ 0 for a concave row likelihood).

§d3: f64

ℓ'''ᵢ.

§d4: f64

ℓ''''ᵢ.

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impl Clone for RowLogLikDerivs

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fn clone(&self) -> RowLogLikDerivs

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 RowLogLikDerivs

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impl Debug for RowLogLikDerivs

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

Formats the value using the given formatter. Read more

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