Struct ConditionDrift 

pub struct ConditionDrift {
    pub variance_ratio_baseline: f64,
    pub variance_ratio_sample: f64,
    pub autocorr_change_baseline: f64,
    pub autocorr_change_sample: f64,
    pub mean_drift_baseline: f64,
    pub mean_drift_sample: f64,
}

Detected drift between calibration and post-test statistics.

Contains per-class drift metrics that indicate how much measurement conditions changed during the test.

Fields

variance_ratio_baseline: f64

Variance ratio for baseline class: post_variance / cal_variance. Values far from 1.0 indicate variance changed significantly.

variance_ratio_sample: f64

Variance ratio for sample class.

autocorr_change_baseline: f64

Absolute change in lag-1 autocorrelation for baseline class.

autocorr_change_sample: f64

Absolute change in lag-1 autocorrelation for sample class.

mean_drift_baseline: f64

Mean drift in standard deviations for baseline class: |post_mean - cal_mean| / cal_std_dev

mean_drift_sample: f64

Mean drift in standard deviations for sample class.

Implementations

impl ConditionDrift

pub fn compute(cal: &CalibrationSnapshot, post: &CalibrationSnapshot) -> Self

Compute drift between calibration and post-test snapshots.

Arguments

• cal - Statistics snapshot from calibration phase
• post - Statistics snapshot from full test run

Returns

A ConditionDrift struct with per-class drift metrics.

pub fn is_significant(&self, thresholds: &DriftThresholds) -> bool

Check if drift exceeds thresholds.

Returns true if any drift metric exceeds its threshold, indicating measurement conditions changed significantly.

pub fn description(&self, thresholds: &DriftThresholds) -> String

Get a human-readable description of the most significant drift.

Trait Implementations

impl Clone for ConditionDrift

fn clone(&self) -> ConditionDrift

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ConditionDrift

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

Formats the value using the given formatter.

impl Copy for ConditionDrift