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stability in stationary)

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James Hensman 2014-02-28 17:35:00 +00:00
parent eae3c28dc0
commit 8b197b79a0
1 changed files with 3 additions and 1 deletions
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4
GPy/kern/_src/stationary.py
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@ -87,7 +87,9 @@ class Stationary(Kern):
"""
if X2 is None:
Xsq = np.sum(np.square(X),1)
return np.sqrt(-2.*tdot(X) + (Xsq[:,None] + Xsq[None,:]))
r2 = -2.*tdot(X) + (Xsq[:,None] + Xsq[None,:])
util.diag.view(r2)[:,]= 0. # force diagnoal to be zero: sometime numerically a little negative
return np.sqrt(r2)
else:
X1sq = np.sum(np.square(X),1)
X2sq = np.sum(np.square(X2),1)