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fixed up dK_dX in the exponential and Matern kerns

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James Hensman 2013-01-16 11:21:06 +00:00
parent 3f6d334704
commit 688d6ac7a5
3 changed files with 9 additions and 10 deletions
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2
GPy/kern/exponential.py
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@ -77,7 +77,7 @@ class exponential(kernpart):
#NB: derivative of diagonal elements wrt lengthscale is 0
target[0] += np.sum(partial)
def dK_dX(self,X,X2,target):
def dK_dX(self,partial,X,X2,target):
"""derivative of the covariance matrix with respect to X."""
if X2 is None: X2 = X
dist = np.sqrt(np.sum(np.square((X[:,None,:]-X2[None,:,:])/self.lengthscales),-1))[:,:,None]