Struct ErrorEllipse 

pub struct ErrorEllipse { /* private fields */ }

1σ horizontal position error ellipse.

Semi-axes and true direction of the major axis of a 2 × 2 covariance. Scale axes by 2.45 for 95 %, by 1.18 for an equal-probability circle when the axes are nearly equal.

Implementations

impl ErrorEllipse

pub fn from_covariance(north: f64, north_east: f64, east: f64) -> Option<Self>

Ellipse of a north/east covariance, m².

None unless a valid covariance: finite, non-negative variances, |correlation| ≤ 1.

pub fn new( semi_major: Distance, semi_minor: Distance, orientation: TrueCourse, ) -> Result<Self>

Ellipse from semi-axes and major-axis direction.

Errors

crate::error::KernelError::OutOfRange for a negative axis or minor > major.

pub fn circular(radius: Distance) -> Self

Circle of the given radius; a negative radius is taken by magnitude.

pub const fn semi_major(&self) -> Distance

1σ semi-major axis.

pub const fn semi_minor(&self) -> Distance

1σ semi-minor axis.

pub fn orientation(&self) -> TrueCourse

True direction of the major axis, in [0°, 180°) (axes have no sense).

pub fn equivalent_radius(&self) -> Distance

Radius of the circle of equal area, for displays with no room for an ellipse.

Trait Implementations

impl Clone for ErrorEllipse

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ErrorEllipse

impl Debug for ErrorEllipse

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

Formats the value using the given formatter.

impl Display for ErrorEllipse

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

Formats the value using the given formatter.

impl PartialEq for ErrorEllipse

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ErrorEllipse