Enum LambdaError 

pub enum LambdaError {
    DimensionMismatch {
        covariance: usize,
        ambiguities: usize,
    },
    Empty,
    NotFinite,
    NotSymmetric {
        row: usize,
        column: usize,
    },
    NotPositiveDefinite {
        pivot: usize,
    },
    SearchExhausted {
        found: usize,
    },
}

A refusal to reduce a covariance.

Variants

DimensionMismatch

The covariance is not square, or its side does not match the float vector’s length.

Fields

covariance: usize

Entries the covariance carries.

ambiguities: usize

Entries the float ambiguity vector carries.

Empty

The problem has no ambiguities to resolve.

NotFinite

The covariance carries a non-finite entry, or the float vector does.

NotSymmetric

The covariance is not symmetric to within its own scale.

Checked rather than assumed: the factorisation reads only the lower triangle, so an asymmetric input would be silently reinterpreted as the symmetric matrix built from that half — a different problem, solved without complaint.

Fields

row: usize

Row of the worst offending pair.

column: usize

Column of the worst offending pair.

NotPositiveDefinite

The covariance is not positive definite, so the ILS objective is not a distance.

Fields

pivot: usize

The pivot, in elimination order, that came out non-positive.

SearchExhausted

The enumeration reached MAX_SEARCH_NODES without exhausting the ellipsoid.

Fields

found: usize

Candidates held when the budget ran out. Fewer than were asked for, and not provably the best ones, which is why they are reported as a count rather than returned.

Trait Implementations

impl Clone for LambdaError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for LambdaError

impl Debug for LambdaError

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

Formats the value using the given formatter.

impl Display for LambdaError

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

Formats the value using the given formatter.

impl Eq for LambdaError

impl Error for LambdaError

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 LambdaError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for LambdaError