Struct StatEllipse 

pub struct StatEllipse {
    pub level: f64,
    pub segments: usize,
}

Confidence ellipse for a 2-D point cloud (analogous to R’s stat_ellipse).

Assumes a bivariate normal distribution: the ellipse is the covariance eigen-decomposition scaled by ggplot2’s radius sqrt(2·F⁻¹(level; 2, n−1)) (see crate::stat::dist::ellipse_radius). Emits segments + 1 boundary points forming a closed path per group.

Fields

level: f64

Confidence level in (0, 1). Default 0.95.

segments: usize

Number of segments used to draw the ellipse. Default 51.

Implementations

impl StatEllipse

pub fn new(level: f64) -> Self

Trait Implementations

impl Default for StatEllipse

fn default() -> Self

Returns the “default value” for a type.

impl Stat for StatEllipse

fn compute_group(&self, data: &DataFrame, _scales: &ScaleSet) -> DataFrame

Transform data for a single group.

fn required_aes(&self) -> Vec<Aesthetic>

Required aesthetics this stat needs.

fn name(&self) -> &str

Name for debug/display.

fn default_aes(&self) -> Aes

Default aesthetic mappings this stat produces.

fn panelwise(&self) -> bool

If true, the stat receives every row of a panel at once (grouped only by facet variables) instead of once per aesthetic group. Needed for cross-group comparisons such as stat_compare_means, which must see all groups together. Defaults to per-group behaviour.

fn validate(&self, _warnings: &mut Vec<String>)

Validate the stat’s own fixed configuration (not the data) and push a human-readable warning for each problem found — e.g. StatBinHex::binwidth being NaN, zero or negative. Called once per layer, before compute_group runs (which has no warnings channel of its own: the per-group call only sees &DataFrame and &ScaleSet, not the plot’s warnings sink). Default: no-op.