Enum ControlChartError 

#[non_exhaustive]
pub enum ControlChartError {
    SampleLengthMismatch {
        expected: usize,
        got: usize,
    },
    NonFiniteValue,
    DefectivesExceedSampleSize {
        defectives: u64,
        sample_size: u64,
    },
    NonPositiveUnits,
    SubgroupSizeOutOfRange {
        got: usize,
        min: usize,
        max: usize,
    },
    ZeroSampleSize,
    InvalidStandard {
        parameter: &'static str,
        requirement: &'static str,
        got: f64,
        min: Option<f64>,
        exclusive_min: Option<f64>,
        max: Option<f64>,
        exclusive_max: Option<f64>,
    },
}

Errors returned when a control chart cannot be constructed or cannot take a sample.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

SampleLengthMismatch

A sample is not the length the chart takes: a subgroup of another size, or more than one value for an individuals chart.

Fields

expected: usize

The chart’s sample length.

got: usize

The length that was given.

NonFiniteValue

A sample holds a NaN or an infinity.

DefectivesExceedSampleSize

A sample reports more defectives than it has items.

Fields

defectives: u64

Defectives reported.

sample_size: u64

Items in the sample.

NonPositiveUnits

Units inspected that is not a positive, finite number.

SubgroupSizeOutOfRange

The requested subgroup size is outside the range the factor tables cover.

Carries the rejected size so a caller can report it without re-deriving it, and so a boundary that cannot unwind – a WebAssembly or C entry point – can turn it into a value rather than a panic.

Fields

got: usize

The size that was asked for.

min: usize

Smallest supported size.

max: usize

Largest supported size.

ZeroSampleSize

A sample size of zero: there is nothing to take a proportion of.

InvalidStandard

A known (Phase I) parameter outside its domain: p_bar in (0, 1), u_bar > 0, phi >= 0, each finite.

Carries the value given and the domain, so a caller can say what the parameter has to be without restating the rule.

Fields

parameter: &'static str

The parameter’s name (p_bar, u_bar, phi).

requirement: &'static str

What the parameter has to satisfy, for a message.

got: f64

The value given.

min: Option<f64>

Inclusive lower bound.

exclusive_min: Option<f64>

Exclusive lower bound.

max: Option<f64>

Inclusive upper bound.

exclusive_max: Option<f64>

Exclusive upper bound.

Trait Implementations

impl Clone for ControlChartError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ControlChartError

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

Formats the value using the given formatter.

impl Display for ControlChartError

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

Formats the value using the given formatter.

impl Error for ControlChartError

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 ControlChartError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ControlChartError