Enum StatsError 

pub enum StatsError {
    EmptyInput,
    LengthMismatch {
        scores: usize,
        labels: usize,
    },
    NoPositiveLabels,
    NoNegativeLabels,
    InvalidBandwidth,
    ZeroVariance,
}

Errors returned by the statistics routines for inputs where a metric is undefined, rather than letting NaN propagate silently into a chart.

Variants

EmptyInput

The input sample was empty.

LengthMismatch

scores and labels had different lengths.

Fields

scores: usize

Number of scores supplied.

labels: usize

Number of labels supplied.

NoPositiveLabels

The label vector contained no positive examples, so TPR / recall is undefined (division by zero positives).

NoNegativeLabels

The label vector contained no negative examples, so FPR is undefined (division by zero negatives). Only relevant to ROC.

InvalidBandwidth

A supplied bandwidth (or one derived from a degenerate sample) was not a finite, strictly-positive number.

ZeroVariance

A computation needing non-zero spread got a constant (zero-variance) input — e.g. Pearson correlation of a constant column, or a histogram of all-identical values.

Trait Implementations

impl Clone for StatsError

fn clone(&self) -> StatsError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StatsError

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

Formats the value using the given formatter.

impl Display for StatsError

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

Formats the value using the given formatter.

impl Eq for StatsError

impl Error for StatsError

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 StatsError

fn eq(&self, other: &StatsError) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for StatsError