Enum CriterionError 

pub enum CriterionError {
    InvalidInput(String),
    InsufficientSamples {
        samples: usize,
        min: usize,
    },
}

Split criteria Errors that can occur during split criterion computation.

These errors cover invalid inputs, insufficient samples, and numerical issues that prevent proper calculation of split quality.

Variants

InvalidInput(String)

Input data is invalid for computation.

This includes mismatched array lengths, non-finite values, or other data integrity issues that violate the criterion’s preconditions.

InsufficientSamples

Not enough samples to perform a meaningful split.

This error is returned when a node or split candidate has fewer samples than the minimum required for stable statistical estimation.

Fields

samples: usize

min: usize

Trait Implementations

impl Debug for CriterionError

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

Formats the value using the given formatter.

impl Display for CriterionError

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

Formats the value using the given formatter.

impl Error for CriterionError

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 From<CriterionError> for TreeError

fn from(source: CriterionError) -> Self

Converts to this type from the input type.