matern32

luas.kernels.matern32(x: Array, y: Array, L: Any) → Array

Matern 3/2 kernel function, used with luas.kernels.evaluate_kernel to build covariance matrices.

\[k(x, y) = \Bigg(1 + \sqrt{3} \frac{|x - y|}{L}\Bigg) \exp\Bigg( -\sqrt{3} \frac{|x - y|}{L}\Bigg)\]

Parameters:

• x (JAXArray) – Input vector 1

• y (JAXArray) – Input vector 2

• L (Scalar) – Length scale

Returns:

Covariance between two input vectors

Return type:

Scalar