Enum AssociationError 

pub enum AssociationError {
    EmptyInput,
    NoItems,
    RaggedRows,
    InvalidSupport,
    InvalidThreshold,
}

Errors that prevent association mining over a transaction matrix.

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

Variants

EmptyInput

The transaction matrix had no rows, so no support can be measured.

NoItems

The matrix had rows but no item columns, so there is nothing to mine.

RaggedRows

The rows had differing item counts (a ragged matrix), so columns are undefined.

InvalidSupport

The minimum support was not in the open-closed range (0, 1], so the frequent-set threshold would be ill-defined.

InvalidThreshold

The minimum metric threshold was not finite, so the rule filter would be ill-defined.

Trait Implementations

impl Clone for AssociationError

fn clone(&self) -> AssociationError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AssociationError

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

Formats the value using the given formatter.

impl Display for AssociationError

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

Formats the value using the given formatter.

impl Eq for AssociationError

impl Error for AssociationError

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 AssociationError

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