Enum RegressionError 

pub enum RegressionError {
    RowMismatch {
        rows_x: usize,
        rows_y: usize,
    },
    EmptyInput,
    RaggedRows,
    Singular,
    InvalidPenalty,
}

Errors that prevent a linear model from being fitted.

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

Variants

RowMismatch

x and y disagreed on the number of observations (rows).

Fields

rows_x: usize

Number of rows in the design matrix x.

rows_y: usize

Number of entries in the target vector y.

EmptyInput

The design matrix had no rows, so no model can be fitted.

RaggedRows

Rows of x did not all share the same number of columns.

Singular

The (penalised) normal-equations matrix was singular to working precision, so the coefficients are not uniquely determined.

InvalidPenalty

The ridge penalty λ was negative (or non-finite), which is not a valid L2 regularisation strength.

Trait Implementations

impl Clone for RegressionError

fn clone(&self) -> RegressionError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RegressionError

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

Formats the value using the given formatter.

impl Display for RegressionError

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

Formats the value using the given formatter.

impl Eq for RegressionError

impl Error for RegressionError

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 RegressionError

fn eq(&self, other: &RegressionError) -> 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 RegressionError