The Rational Quadratic (RQ) kernel class.
Note that it can handle a length scale for each dimension for Automtic Relevance Determination.
Initialize a Squared Exponential kernel instance.
Parameters : | length_scale : float or numpy.ndarray
sigma_f : float
alpha : float
enable_ca : None or list of str
disable_ca : None or list of str
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Compute gradient of the kernel matrix. A must for fast model selection with high-dimensional data.
Set hyperaparmeters from a vector.
Used by model selection. Note: ‘alpha’ is not considered as an hyperparameter.