Struct ArdRationalQuadraticKernel 

pub struct ArdRationalQuadraticKernel { /* private fields */ }

ARD Rational Quadratic kernel.

K(x, y) = σ² * (1 + Σ((x_i - y_i)² / (2 * α * l_i²)))^(-α)

Implementations

impl ArdRationalQuadraticKernel

pub fn new(length_scales: Vec<f64>, alpha: f64) -> Result<Self>

Create a new ARD Rational Quadratic kernel.

pub fn with_variance( length_scales: Vec<f64>, alpha: f64, variance: f64, ) -> Result<Self>

Create with custom variance.

pub fn length_scales(&self) -> &[f64]

Get the length scales.

pub fn variance(&self) -> f64

Get the variance.

pub fn alpha(&self) -> f64

Get the alpha parameter.

Trait Implementations

impl Clone for ArdRationalQuadraticKernel

fn clone(&self) -> ArdRationalQuadraticKernel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ArdRationalQuadraticKernel

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

Formats the value using the given formatter.

impl Kernel for ArdRationalQuadraticKernel

fn compute(&self, x: &[f64], y: &[f64]) -> Result<f64>

Compute kernel value between two inputs.

fn name(&self) -> &str

Get kernel name for identification.

fn compute_matrix(&self, inputs: &[Vec<f64>]) -> Result<Vec<Vec<f64>>>

Compute kernel matrix for a set of inputs.

fn is_psd(&self) -> bool

Check if kernel is positive semi-definite.