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Merge pull request #148 from martinsch/normalization_fix

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Normalization: avoid division by zero for constant feature dimensions
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James Hensman 2014-11-21 11:44:51 +00:00
commit 67ddbde119
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GPy/core/gp_base.py
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@ -29,6 +29,7 @@ class GPBase(Model):
if normalize_X: if normalize_X:
self._Xoffset = X.mean(0)[None, :] self._Xoffset = X.mean(0)[None, :]
self._Xscale = X.std(0)[None, :] self._Xscale = X.std(0)[None, :]
self._Xscale[np.where(self._Xscale==0)] = 1
self.X = (X.copy() - self._Xoffset) / self._Xscale self.X = (X.copy() - self._Xoffset) / self._Xscale
else: else:
self._Xoffset = np.zeros((1, self.input_dim)) self._Xoffset = np.zeros((1, self.input_dim))