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lengthscale fixes

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This commit is contained in:
James Hensman 2014-02-26 13:37:15 +00:00
parent 96d7bb3c86
commit 26aeb5e1db
1 changed files with 3 additions and 10 deletions
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13
GPy/kern/_src/stationary.py
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@ -73,16 +73,9 @@ class Stationary(Kern):
"""
if self.ARD:
if X2 is None:
Xl = X/self.lengthscale
Xsq = np.sum(np.square(Xl),1)
return np.sqrt(np.sqrt(-2.*tdot(Xl) +(Xsq[:,None] + Xsq[None,:])))
else:
X1l = X/self.lengthscale
X2l = X2/self.lengthscale
X1sq = np.sum(np.square(X1l),1)
X2sq = np.sum(np.square(X2l),1)
return np.sqrt(-2.*np.dot(X, X2.T) + (X1sq[:,None] + X2sq[None,:]))
if X2 is not None:
X2 = X2 / self.lengthscale
return self._unscaled_dist(X/self.lengthscale, X2)
else:
return self._unscaled_dist(X, X2)/self.lengthscale