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update in the rational quadratic kernel and new the tutorial on writting kernels

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Nicolas 2013-03-11 18:21:29 +00:00
parent aee0cee5a8
commit 0e187b6921
8 changed files with 263 additions and 77 deletions
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5
GPy/kern/rational_quadratic.py
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@ -11,7 +11,7 @@ class rational_quadratic(kernpart):
.. math::
k(r) = \sigma^2 \left(1 + \frac{r^2}{2 \ell^2})^{- \alpha} \ \ \ \ \ \\text{ where } r^2 = (x-y)^2
k(r) = \sigma^2 \\bigg( 1 + \\frac{r^2}{2 \ell^2} \\bigg)^{- \\alpha} \ \ \ \ \ \\text{ where } r^2 = (x-y)^2
:param D: the number of input dimensions
:type D: int (D=1 is the only value currently supported)
@ -19,6 +19,8 @@ class rational_quadratic(kernpart):
:type variance: float
:param lengthscale: the lengthscale :math:`\ell`
:type lengthscale: float
:param power: the power :math:`\\alpha`
:type power: float
:rtype: kernpart object
"""
@ -76,4 +78,3 @@ class rational_quadratic(kernpart):
def dKdiag_dX(self,dL_dKdiag,X,target):
pass