Struct TDigest 

pub struct TDigest { /* private fields */ }

T-digest approximate quantile estimator.

Maintains a sorted set of centroids that approximate the data distribution. Accurate at the extremes (p1, p99) and reasonable in the middle. Mergeable across partitions and shards.

Implementations

impl TDigest

pub fn new() -> Self

pub fn with_compression(max_centroids: usize) -> Self

pub fn add(&mut self, value: f64)

pub fn add_batch(&mut self, values: &[f64])

pub fn quantile(&self, q: f64) -> f64

Estimate the value at a given quantile (0.0 to 1.0).

pub fn merge(&mut self, other: &TDigest)

pub fn count(&self) -> u64

pub fn add_centroid(&mut self, mean: f64, count: u64)

Add a pre-aggregated centroid (for merge/deserialization).

pub fn centroids(&self) -> Vec<(f64, u64)>

Access centroids as (mean, count) pairs for serialization.

pub fn memory_bytes(&self) -> usize

Approximate memory usage in bytes.

Trait Implementations

impl Debug for TDigest

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

Formats the value using the given formatter.

impl Default for TDigest

fn default() -> Self

Returns the “default value” for a type.