Enum VmpFactor 

pub enum VmpFactor {
    GaussianObservation {
        target: String,
        observation: f64,
        precision: f64,
    },
    GaussianStep {
        lhs: String,
        rhs: String,
        precision: f64,
    },
    DirichletCategorical {
        dirichlet: String,
        categorical: String,
    },
    CategoricalObservation {
        dirichlet: String,
        observation: usize,
        num_categories: usize,
    },
}

Conjugate relationship represented by a single factor.

Variants

GaussianObservation

Gaussian observation with known precision, centred on another Gaussian variable. Produces a natural-parameter delta of η_delta = [τ_obs · y] with posterior precision contribution τ_obs.

Fields

target: String

Variable whose mean is being inferred.

observation: f64

Observed value y.

precision: f64

Known observation precision τ_obs.

GaussianStep

Gaussian x_child ~ N(x_parent, 1/τ) — a “Gaussian step” between two unknown means sharing a known precision. Both endpoints receive a symmetric natural-parameter delta driven by the other’s expected mean.

Fields

lhs: String

Endpoint 1 variable name.

rhs: String

Endpoint 2 variable name.

precision: f64

Known precision τ.

DirichletCategorical

x ~ Categorical(π) where π is itself a Dirichlet variable. Updates the Dirichlet concentration by E_q[u(x)] = softmax(η_x) and contributes E_q[log π] back to the Categorical natural parameters.

Fields

dirichlet: String

Dirichlet-distributed variable π.

categorical: String

Categorical-distributed variable x.

CategoricalObservation

Observed categorical value (evidence). Only contributes counts to its Dirichlet parent; the categorical itself is pinned.

Fields

dirichlet: String

Dirichlet-distributed variable π.

observation: usize

Observed category index.

num_categories: usize

Number of categories.

Trait Implementations

impl Clone for VmpFactor

fn clone(&self) -> VmpFactor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VmpFactor

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

Formats the value using the given formatter.