mvpa2.kernels.sg.PolySGKernel

class mvpa2.kernels.sg.PolySGKernel(**kwargs)

Polynomial kernel: K(a,b) = (a*b.T + c)**degree c is 1 if and only if ‘inhomogenous’ is True

Methods

as_raw_sg()
as_sg()

Initialize instance of PolySGKernel

Parameters:

degree : int, optional

Polynomial order of the kernel. Constraints: value must be convertible to type ‘int’. [Default: 2]

inhomogenous : bool, optional

Whether +1 is added within the expression. Constraints: value must be convertible to type bool. [Default: True]

normalizer_cls : sg.Kernel.CKernelNormalizer

Class to use as a normalizer for the kernel. Will be instantiated upon compute(). Only supported for shogun >= 0.6.5. By default (if left None) assigns IdentityKernelNormalizer to assure no normalization.

normalizer_args : None or list

If necessary, provide a list of arguments for the normalizer.

Methods

as_raw_sg()
as_sg()