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added dKdiag_dtheta for linear

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James Hensman 2013-03-01 23:06:58 +00:00
parent 3ffa8d782c
commit c5f4bcd02b
1 changed files with 7 additions and 0 deletions
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7
GPy/kern/linear.py
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@ -92,6 +92,13 @@ class linear(kernpart):
self._psi_computations(Z,mu,S)
target += np.sum(self.variances*self.mu2_S,1)
def dKdiag_dtheta(self,partial, X, target):
tmp = partial[:,None]*X**2
if self.ARD:
target += tmp.sum(0)
else:
target += tmp.sum()
def dpsi0_dtheta(self,partial,Z,mu,S,target):
self._psi_computations(Z,mu,S)
tmp = partial[:, None] * self.mu2_S