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Merge of rbf_inv failed, corrected with AD

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Max Zwiessele 2013-07-24 15:30:30 +01:00
parent 112ae7712d
commit e3af917b1b
1 changed files with 13 additions and 12 deletions
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7
GPy/kern/parts/rbf_inv.py
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@ -160,10 +160,11 @@ class RBFInv(RBF):
def dpsi1_dtheta(self, dL_dpsi1, Z, mu, S, target): def dpsi1_dtheta(self, dL_dpsi1, Z, mu, S, target):
self._psi_computations(Z, mu, S) self._psi_computations(Z, mu, S)
tmp = 1 + S[:, None, :] * self.inv_lengthscale2 tmp = 1 + S[:, None, :] * self.inv_lengthscale2
d_inv_length_old = -self._psi1[:,:,None] * ((self._psi1_dist_sq - 1.)/(self.lengthscale*self._psi1_denom) + self.inv_lengthscale)/self.inv_lengthscale2 # d_inv_length_old = -self._psi1[:, :, None] * ((self._psi1_dist_sq - 1.) / (self.lengthscale * self._psi1_denom) + self.inv_lengthscale) / self.inv_lengthscale2
d_inv_length = -self._psi1[:,:,None] * ((self._psi1_dist_sq - 1.)/self._psi1_denom + self.lengthscale) d_length = -(self._psi1[:, :, None] * ((np.square(self._psi1_dist) * self.inv_lengthscale) / (tmp ** 2) + (S[:, None, :] * self.inv_lengthscale) / (tmp)))
# d_inv_length = -self._psi1[:, :, None] * ((self._psi1_dist_sq - 1.) / self._psi1_denom + self.lengthscale)
target[0] += np.sum(dL_dpsi1 * self._psi1 / self.variance) target[0] += np.sum(dL_dpsi1 * self._psi1 / self.variance)
dpsi1_dlength = d_inv_length * dL_dpsi1[:, :, None] dpsi1_dlength = d_length * dL_dpsi1[:, :, None]
if not self.ARD: if not self.ARD:
target[1] += dpsi1_dlength.sum() # *(-self.lengthscale2) target[1] += dpsi1_dlength.sum() # *(-self.lengthscale2)
else: else: