Struct CorrelationTracker 

pub struct CorrelationTracker { /* private fields */ }

Running correlation coefficient tracker (trueno-viz pattern)

Tracks Pearson correlation between two variables using online algorithm. Useful for finding related metrics (CPU vs memory, network vs disk).

Implementations

impl CorrelationTracker

pub fn new() -> Self

Create a new correlation tracker

pub fn update(&mut self, x: f64, y: f64)

Update with new (x, y) pair (O(1))

Uses Welford’s online algorithm for covariance.

pub fn correlation(&self) -> f64

Get correlation coefficient (O(1))

Returns value in [-1, 1] or 0 if insufficient data.

pub fn is_positive(&self) -> bool

Check if positively correlated (r > 0.5)

pub fn is_negative(&self) -> bool

Check if negatively correlated (r < -0.5)

pub fn is_strong(&self) -> bool

Check if strongly correlated (|r| > 0.7)

pub fn covariance(&self) -> f64

Get covariance (O(1))

pub fn count(&self) -> u64

Get sample count

pub fn reset(&mut self)

Reset tracker

Trait Implementations

impl Clone for CorrelationTracker

fn clone(&self) -> CorrelationTracker

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CorrelationTracker

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

Formats the value using the given formatter.

impl Default for CorrelationTracker

fn default() -> Self

Returns the “default value” for a type.