Enum FeatureSelectionError 

pub enum FeatureSelectionError {
    EmptyInput,
    NoFeatures,
    RaggedRows,
    NonFinite,
    InvalidThreshold,
    LabelLengthMismatch,
    TooFewClasses,
    DegenerateClasses,
}

Errors that prevent a selector from scoring a feature matrix.

Returned (never panicked) so callers stay clear of the crate’s unwrap/panic lint gate and can surface a clean diagnostic.

Variants

EmptyInput

The feature matrix had no samples (no rows), so nothing can be scored.

NoFeatures

The matrix had rows but no feature columns, so there is nothing to select.

RaggedRows

The rows had differing feature counts (a ragged matrix), so columns are undefined.

NonFinite

A matrix entry was non-finite (NaN or ±∞), which has no valid score.

InvalidThreshold

The supplied threshold was not finite, so the keep rule would be ill-defined.

LabelLengthMismatch

The label vector’s length did not match the number of samples (rows).

TooFewClasses

Fewer than two distinct classes were present, so a between-class F-test is undefined.

DegenerateClasses

A class had fewer observations than the F-test requires, or the within-class variation was zero, so the ANOVA F-statistic is undefined.

Trait Implementations

impl Clone for FeatureSelectionError

fn clone(&self) -> FeatureSelectionError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FeatureSelectionError

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

Formats the value using the given formatter.

impl Display for FeatureSelectionError

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

Formats the value using the given formatter.

impl Eq for FeatureSelectionError

impl Error for FeatureSelectionError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for FeatureSelectionError

fn eq(&self, other: &FeatureSelectionError) -> 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 StructuralPartialEq for FeatureSelectionError