Enum Scale 

#[non_exhaustive]
pub enum Scale {
    Linear,
    Log10,
    SymLog {
        linthresh: f64,
    },
    Time,
}

A scale maps data values to the normalized [0, 1] range for axis display.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Linear

Linear mapping from [min, max] to [0, 1].

Log10

Base-10 logarithmic scale. Data must be positive.

SymLog

Symmetric log scale: linear near zero, logarithmic beyond ±linthresh.

Fields

linthresh: f64

The range (-linthresh, linthresh) is treated linearly.

Time

Time axis. Values are interpreted as seconds since the Unix epoch (1970-01-01 UTC) and transform linearly; tick labels are rendered as calendar dates/times, with granularity chosen from the visible span.

Implementations

impl Scale

pub fn transform(&self, val: f64, min: f64, max: f64) -> f64

Transforms a data value to the [0, 1] range given the axis [min, max].

Values outside [min, max] will map outside [0, 1], which can be used for clipping or extrapolation by the caller.

pub fn inverse(&self, t: f64, min: f64, max: f64) -> f64

Inverse transform: maps a normalized [0, 1] value back to data space.

pub fn requires_positive(&self) -> bool

Returns true if this scale requires strictly positive data values.

Trait Implementations

impl Clone for Scale

fn clone(&self) -> Scale

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Scale

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

Formats the value using the given formatter.

impl Default for Scale

fn default() -> Scale

Returns the “default value” for a type.