Struct ScaleBand 

pub struct ScaleBand { /* private fields */ }

Maps discrete domain values (categories) to continuous range positions. Equivalent to D3’s scaleBand(), used for bar chart x-axes.

Implementations

impl ScaleBand

pub fn new(domain: Vec<String>, range: (f64, f64)) -> Self

Create a new band scale with the given domain and range. Default padding: inner=0.1, outer=0.1.

pub fn padding_inner(self, padding: f64) -> Self

Set inner padding (between bands). Returns self for chaining.

pub fn padding_outer(self, padding: f64) -> Self

Set outer padding (before first and after last band). Returns self for chaining.

pub fn padding(self, padding: f64) -> Self

Set both inner and outer padding to the same value.

pub fn map(&self, value: &str) -> Option<f64>

Map a domain value to its range position (the start of the band). Returns None if the value is not in the domain.

pub fn bandwidth(&self) -> f64

Get the width of each band.

pub fn step(&self) -> f64

Get the step size (band + inner padding).

pub fn domain(&self) -> &[String]

Get the domain values.

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

Get the range extent.