Struct CvSelectionResult 

#[non_exhaustive]
pub struct CvSelectionResult<T: Clone> {
    pub candidates: Vec<T>,
    pub cv_errors: Vec<f64>,
    pub optimal: T,
    pub min_error: f64,
}

Generic cross-validation result for hyperparameter selection.

Provides a type-safe way to represent the outcome of any CV-based parameter search. Existing specialised types (super::scalar_on_function::FregreCvResult, etc.) remain unchanged; new code can use CvSelectionResult<f64> for lambda or bandwidth CV, CvSelectionResult<usize> for component-count CV, and so on.

Examples

use fdars_core::cv::CvSelectionResult;

let candidates: Vec<f64> = vec![0.01, 0.1, 1.0, 10.0];
let cv_errors = vec![2.5, 1.2, 0.8, 1.5];
let result = CvSelectionResult::from_search(candidates, cv_errors).unwrap();
assert!((result.optimal - 1.0_f64).abs() < 1e-15);
assert!((result.min_error - 0.8).abs() < 1e-15);

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

candidates: Vec<T>

Candidate parameter values tested.

cv_errors: Vec<f64>

CV error (e.g., MSE) for each candidate.

optimal: T

Optimal parameter value (minimising CV error).

min_error: f64

Minimum CV error.

Implementations

impl<T: Clone + PartialOrd> CvSelectionResult<T>

pub fn from_search(candidates: Vec<T>, cv_errors: Vec<f64>) -> Option<Self>

Create from candidates and errors, selecting the minimum.

Returns None if candidates is empty or lengths differ.

Trait Implementations

impl<T: Clone + Clone> Clone for CvSelectionResult<T>

fn clone(&self) -> CvSelectionResult<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug + Clone> Debug for CvSelectionResult<T>

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

Formats the value using the given formatter.

impl<T: PartialEq + Clone> PartialEq for CvSelectionResult<T>

fn eq(&self, other: &CvSelectionResult<T>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T: Clone> StructuralPartialEq for CvSelectionResult<T>