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GPLVM demo working

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This commit is contained in:
James Hensman 2012-11-30 10:31:02 +00:00
parent 4b4f1da128
commit 5f92ff6785
4 changed files with 13 additions and 14 deletions
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7
GPy/models/GPLVM.py
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@ -46,11 +46,8 @@ class GPLVM(GP_regression):
def log_likelihood_gradients(self):
dL_dK = self.dL_dK()
dK_dtheta = self.kern.dK_dtheta(self.X)
dL_dtheta = (dK_dtheta*dL_dK[:,:,None]).sum(0).sum(0)
dK_dX = self.kern.dK_dX(self.X)
dL_dX = 2.*np.sum(dL_dK[:,:,None]*dK_dX,0)
dL_dtheta = self.kern.dK_dtheta(dL_dK,self.X)
dL_dX = 2*self.kern.dK_dX(dL_dK,self.X)
return np.hstack((dL_dX.flatten(),dL_dtheta))