Cov_se_iso (gpr.Gpr.Cov_se

Isotropic squared exponential covariance

The covariance is defined as:

k(x, y) = sf^2 * exp(-1/2 * |1/ell*(x-y)|^2)

where sf^2 is the amplitude, and ell is the length scale.

module Params : sig ... end

type inducing_hyper = {

ind : int;
dim : int;

}

module Eval : 
  Interfaces.Specs.Eval
    with type Kernel.params = Params.t
    with type Inducing.t = Lacaml.D.mat
    with type Input.t = Lacaml.D.vec
    with type Inputs.t = Lacaml.D.mat

module Deriv : 
  Interfaces.Specs.Deriv
    with module Eval = Eval
    with type Hyper.t =
           [ `Log_ell | `Log_sf2 | `Inducing_hyper of inducing_hyper ]