ThompsonForestPosterior
data class ThompsonForestPosterior(val priorWeight: Double = 1.0, val priorVariance: Double = 1.0) : ForestPosterior(source)
Forest counterpart to ThompsonTreePosterior.
Constructors
ThompsonForestPosterior
Properties
priorVariance
Prior variance used when the leaf has no signal yet.
priorWeight
Pseudo-count added to the leaf's totalWeights; floor for empty leaves.
Functions
evaluate
open override fun evaluate(snapshot: ForestRegressionResult, x: VectorView, rng: Random, exploration: Double = 1.0): Double(source)
Score a query point x under the regression snapshot. exploration controls the posterior-variance scale (Thompson) or the UCB width (LinUcb-style); 0.0 collapses to the point estimate.