Struct FillBetweenArtist 

pub struct FillBetweenArtist {
    pub x: Series,
    pub y1: Series,
    pub y2: Series,
    pub color: Color,
    pub label: Option<String>,
    pub alpha: f64,
}

A filled region between two y-series that share a common x-series.

The renderer draws a closed polygon connecting (x, y1) forward and (x, y2) backward, then fills it with the configured color and opacity. This is commonly used for confidence bands, area charts, and shaded difference regions.

Fields

x: Series

X-coordinates shared by both y-series.

y1: Series

Y-coordinates of the first boundary curve.

y2: Series

Y-coordinates of the second boundary curve.

color: Color

Fill color of the shaded region.

label: Option<String>

Optional legend label. When Some, the fill region appears in the legend.

alpha: f64

Opacity from 0.0 (fully transparent) to 1.0 (fully opaque).

Implementations

impl FillBetweenArtist

pub fn data_bounds(&self) -> (f64, f64, f64, f64)

Computes the data-space bounding box (xmin, xmax, ymin, ymax).

The x-bounds come from the shared x series. The y-bounds are the union of y1 and y2 (i.e. the overall min and max across both boundary curves). Falls back to (0.0, 1.0) on any axis that has no finite values.

impl FillBetweenArtist

pub fn color(&mut self, color: Color) -> &mut Self

Sets the fill color.

Applies the given Color to the entire shaded region between the two boundary curves. Any previously set color is replaced.

Arguments

• color - The Color to fill the region with.

Examples

artist.color(Color::rgb(78, 121, 167));

pub fn label(&mut self, label: &str) -> &mut Self

Sets the legend label.

When a legend is displayed on the figure, this label will appear next to the color swatch for this fill region. Passing a new value overwrites any previously set label.

Arguments

• label - A string slice that will be stored as the legend entry.

Examples

artist.label("Confidence interval");

pub fn alpha(&mut self, alpha: f64) -> &mut Self

Sets the opacity (0.0 = fully transparent, 1.0 = fully opaque).

The value is clamped to the [0.0, 1.0] range. The default opacity is 1.0. Lower values are useful for layering multiple fill regions so that underlying data remains visible.

Arguments

• alpha - The desired opacity level.

Examples

artist.alpha(0.3); // 30% opaque, letting background show through

Trait Implementations

impl Clone for FillBetweenArtist

fn clone(&self) -> FillBetweenArtist

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FillBetweenArtist

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

Formats the value using the given formatter.