Enum PartitionError 

pub enum PartitionError {
    TooFewFolds {
        k: usize,
    },
    MoreFoldsThanSamples {
        k: usize,
        n: usize,
    },
    NeedsClasses,
    NeedsGroups,
    ClassTooSmall {
        class: u32,
        count: usize,
        k: usize,
    },
    TooFewGroups {
        groups: usize,
        k: usize,
    },
    GapTooLarge {
        gap: usize,
        k: usize,
    },
}

Why the samples cannot be cut that way.

One type for the five schemes, and not one each: they are the ways a cut fails, and which scheme was asked for is already in the message.

Variants

TooFewFolds

Fewer than two folds.

Fields

k: usize

What was asked for.

MoreFoldsThanSamples

More folds than there are samples to put in them.

Fields

k: usize

What was asked for.

n: usize

How many samples there are.

NeedsClasses

Stratifying was asked for and no class was said.

NeedsGroups

Grouping was asked for and no group was said.

ClassTooSmall

A class with fewer members than folds cannot be in every fold.

Fields

class: u32

Which one.

count: usize

How many it has.

k: usize

How many folds.

TooFewGroups

Fewer groups than folds: one fold would get nothing.

Fields

groups: usize

How many distinct groups there are.

k: usize

How many folds.

GapTooLarge

The gap eats the whole of the first fold’s training set.

Fields

gap: usize

What was asked for.

k: usize

How many splits.

Trait Implementations

impl Clone for PartitionError

fn clone(&self) -> PartitionError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PartitionError

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

Formats the value using the given formatter.

impl Display for PartitionError

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

Formats the value using the given formatter.

impl Error for PartitionError

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 PartitionError

fn eq(&self, other: &PartitionError) -> 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 Eq for PartitionError

impl StructuralPartialEq for PartitionError