Enum ProjectionError 

pub enum ProjectionError {
    EmptyCorpus,
    DimensionTooLow {
        got: usize,
        required: usize,
    },
    InconsistentDimension {
        index: usize,
        expected: usize,
        got: usize,
    },
    TooFewEmbeddings {
        got: usize,
        required: usize,
    },
    InvalidSigma {
        got: f64,
    },
    SliceLengthMismatch {
        expected: usize,
        got: usize,
    },
}

Reasons a projection fit can fail.

Every concrete projection’s fit used to panic via assert! on invalid input, which turned typos in Python / WASM bindings into PanicExceptions. These variants classify the same preconditions so callers can surface typed errors instead.

Variants

EmptyCorpus

The input slice was empty. Fitting needs at least one embedding.

DimensionTooLow

Embedding dimensionality below the projection’s requirement. PCA and kernel PCA need dim >= 3; Laplacian requires dim > 0.

Fields

got: usize

required: usize

InconsistentDimension

Embeddings disagreed on dimensionality. Every row must match the first one; the mismatch is reported with the offending index.

Fields

index: usize

expected: usize

got: usize

TooFewEmbeddings

Projection needs more embeddings than were provided. Laplacian eigenmap’s graph construction requires n >= 4.

Fields

got: usize

required: usize

InvalidSigma

fit_with_sigma was given a non-positive Gaussian bandwidth.

Fields

got: f64

SliceLengthMismatch

A parallel slice (e.g. category labels) did not have the same length as the embedding slice.

Fields

expected: usize

got: usize

Trait Implementations

impl Clone for ProjectionError

fn clone(&self) -> ProjectionError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ProjectionError

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

Formats the value using the given formatter.

impl Display for ProjectionError

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

Formats the value using the given formatter.

impl Error for ProjectionError

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<ProjectionError> for PipelineError

fn from(source: ProjectionError) -> Self

Converts to this type from the input type.

impl PartialEq for ProjectionError

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