Enum GraphError 

pub enum GraphError {
    NoSuchNode {
        edge: usize,
        node: usize,
        nodes: usize,
    },
    SelfLoop {
        edge: usize,
        node: usize,
    },
    NoSuchAnchor {
        anchor: usize,
        nodes: usize,
    },
    Singular {
        damping: f64,
    },
}

What can be wrong with a graph.

Variants

NoSuchNode

An edge names a node that is not there.

Fields

edge: usize

Which edge.

node: usize

The index it named.

nodes: usize

How many there are.

SelfLoop

An edge joins a node to itself.

Not merely useless: its two Jacobian blocks land in the same place and cancel, so it contributes a row of zeros and makes the system harder to solve while measuring nothing.

Fields

edge: usize

Which edge.

node: usize

The node on both ends.

NoSuchAnchor

The anchor is not a node.

Fields

anchor: usize

The index given.

nodes: usize

How many there are.

Singular

The normal equations could not be factorised at any damping.

Reached only when the system is degenerate in a way damping cannot repair, which in practice means a graph whose edges leave part of it unconnected to the anchor.

Fields

damping: f64

The largest damping that was tried.

Trait Implementations

impl Debug for GraphError

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

Formats the value using the given formatter.

impl Display for GraphError

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

Formats the value using the given formatter.

impl Error for GraphError

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 GraphError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for GraphError