Struct LeaveOneOutCrossValidation 

pub struct LeaveOneOutCrossValidation {
    pub scheme_name: String,
    pub description: String,
}

Cross-validation using a single observation per validation fold.

Fields

scheme_name: String

Unique name identifying a resampling scheme.

description: String

Free-text description.

Implementations

impl LeaveOneOutCrossValidation

pub fn run( &self, n: usize, fit_score: impl FnMut(&[usize], &[usize]) -> f64, ) -> Result<CvScores>

Runs leave-one-out cross-validation for this scheme over n observations.

A thin inherent wrapper over loo_cross_validate so the LeaveOneOutCrossValidation type carries its own numerics: it ignores the scheme’s descriptive fields and forwards n and fit_score unchanged.

Arguments

• n — the number of observations; must be at least 2.
• fit_score — invoked as fit_score(train_idx, test_idx) per fold, returning that fold’s score. FnMut so it may carry state across folds.

Returns

A CvScores with the per-fold scores, their mean, and their standard error.

Errors

Returns Error::InsufficientData when n < 2.

Examples

use stats_claw::resampling::LeaveOneOutCrossValidation;

let scheme = LeaveOneOutCrossValidation::default();
let scores = scheme.run(4, |_train, _test| 1.0)?;
assert_eq!(scores.fold_scores().len(), 4);
assert!((scores.mean() - 1.0).abs() < 1e-12);

Trait Implementations

impl Clone for LeaveOneOutCrossValidation

fn clone(&self) -> LeaveOneOutCrossValidation

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LeaveOneOutCrossValidation

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

Formats the value using the given formatter.

impl Default for LeaveOneOutCrossValidation

fn default() -> LeaveOneOutCrossValidation

Returns the “default value” for a type.