Struct ClosureScorer 

pub struct ClosureScorer<F> { /* private fields */ }

A Scorer backed by an arbitrary closure — the analogue of scikit-learn’s make_scorer, so users are never limited to the built-ins.

Trait Implementations

impl<F> Scorer for ClosureScorer<F>

where F: Fn(&Array1<f64>, &Array1<f64>) -> f64,

fn score(&self, y_true: &Array1<f64>, y_pred: &Array1<f64>) -> f64

Compute the score. y_true and y_pred are assumed equal length.

fn name(&self) -> &str

A short human-readable name (used to label CvResults columns).

fn greater_is_better(&self) -> bool

Whether a larger score is better (e.g. accuracy, R²) or smaller is better (e.g. MAE, MSE, RMSE). Defaults to true.