Enum TuneObjective 

pub enum TuneObjective {
    Mrr,
    Top1,
    CoveredMrr,
    Top1AtMinCoverage,
    SuccessWeightedMrr,
    SuccessWeightedTop1,
}

Which held-out metric tune ranks candidates by. See each variant’s doc comment; CoveredMrr is the recommended default – optimizing Mrr alone tends to pick configs that abstain (report no candidate) except when very confident, while optimizing coverage alone tolerates a sloppy prior. CoveredMrr penalizes both.

Variants

Mrr

mean_reciprocal_rank, among evaluated (covered) test observations only.

Top1

top1_hit_rate, among evaluated (covered) test observations only.

CoveredMrr

covered_fraction * mean_reciprocal_rank – MRR averaged across all test observations, treating an uncovered one as contributing 0.

Top1AtMinCoverage

Identical to Top1; choosing this objective requires TuneConstraints::min_covered_fraction to also be set, so the coverage floor lives in one place (constraints) instead of being duplicated inside the objective itself.

SuccessWeightedMrr

EvalReport::success_weighted_mean_reciprocal_rank – like Mrr, but a failed or unrecorded-outcome test observation contributes nothing, so this favors configs that agree with actions that actually worked.

SuccessWeightedTop1

EvalReport::success_weighted_top1_hit_rate, the same idea applied to Top1.

Trait Implementations

impl Clone for TuneObjective

fn clone(&self) -> TuneObjective

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TuneObjective

impl Debug for TuneObjective

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

Formats the value using the given formatter.

impl Eq for TuneObjective

impl PartialEq for TuneObjective

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for TuneObjective

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for TuneObjective