Struct PerQueryScore 

#[non_exhaustive]
pub struct PerQueryScore {
    pub query: String,
    pub expected_count: usize,
    pub first_hit_rank: Option<usize>,
    pub precision_at_k: f64,
    pub recall_at_k: f64,
    pub ndcg_at_k: f64,
}

One row of the report — every metric for one query, plus the rank of the first hit (1-based) or None when none of the expected ids appeared in the top-K window. expected_count is preserved so recall- and NDCG-shaped means can correctly skip queries with empty expected.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

query: String

Query text, copied from the input sample for trace output.

expected_count: usize

|expected| for this sample — used by aggregators to skip queries where recall / NDCG would be undefined.

first_hit_rank: Option<usize>

1-based rank of the first expected id within the top-K window, or None if no expected id landed in the window.

precision_at_k: f64

|expected ∩ top-K| / k for this query (always defined; 0.0 when k == 0).

recall_at_k: f64

|expected ∩ top-K| / |expected| for this query (0.0 when expected is empty).

ndcg_at_k: f64

Normalised DCG@K with binary relevance for this query (0.0 when expected is empty or k == 0).

Trait Implementations

impl Clone for PerQueryScore

fn clone(&self) -> PerQueryScore

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PerQueryScore

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

Formats the value using the given formatter.

impl Serialize for PerQueryScore

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

where __S: Serializer,

Serialize this value into the given Serde serializer.