Enum ModelParams 

pub enum ModelParams {
    Constant {
        offset: f64,
    },
    Logarithmic {
        gain: f64,
        offset: f64,
    },
    Linear {
        gain: f64,
        offset: f64,
    },
    Linearithmic {
        gain: f64,
        offset: f64,
    },
    Quadratic {
        gain: f64,
        offset: f64,
    },
    Cubic {
        gain: f64,
        offset: f64,
    },
    Polynomial {
        gain: f64,
        power: f64,
    },
    Exponential {
        gain: f64,
        base: f64,
    },
}

Coefficients of a fitted approximation function.

Each variant carries exactly the parameters its shape has, so a fitted polynomial always has an exponent and a fitted line never carries an unused one. There is no representable fit with a parameter missing.

Variants

Constant

f(x) = offset

Fields

offset: f64

Value the cost settles at.

Logarithmic

f(x) = gain * ln(x) + offset

Fields

gain: f64

Multiplier of ln(x).

offset: f64

Cost at x = 1.

Linear

f(x) = gain * x + offset

Fields

gain: f64

Cost per unit of input.

offset: f64

Cost at x = 0.

Linearithmic

f(x) = gain * x * ln(x) + offset

Fields

gain: f64

Multiplier of x * ln(x).

offset: f64

Cost at x = 1.

Quadratic

f(x) = gain * x^2 + offset

Fields

gain: f64

Multiplier of x^2.

offset: f64

Cost at x = 0.

Cubic

f(x) = gain * x^3 + offset

Fields

gain: f64

Multiplier of x^3.

offset: f64

Cost at x = 0.

Polynomial

f(x) = gain * x^power

Fields

gain: f64

Cost at x = 1.

power: f64

Fitted exponent. Negative when cost falls as the input grows.

Exponential

f(x) = gain * base^x

Fields

gain: f64

Cost at x = 0.

base: f64

Fitted base.

Implementations

impl ModelParams

pub fn evaluate(&self, x: f64) -> f64

Evaluates the fitted function at x.

Trait Implementations

impl Clone for ModelParams

fn clone(&self) -> ModelParams

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ModelParams

impl Debug for ModelParams

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ModelParams

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ModelParams

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ModelParams

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ModelParams