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Modified logexp transformation to prevent it returning zero when argument is under -36.

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Neil Lawrence 2014-03-07 17:35:00 +00:00
parent c7913b14fd
commit 0f8dbba56d
1 changed files with 1 additions and 1 deletions
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2
GPy/core/transformations.py
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@ -29,7 +29,7 @@ class transformation(object):
class logexp(transformation):
domain = POSITIVE
def f(self, x):
return np.where(x>lim_val, x, np.log(1. + np.exp(x)))
return np.where(x<-lim_val, np.log(1+np.exp(-lim_val)), np.where(x>lim_val, x, np.log(1. + np.exp(x))))
def finv(self, f):
return np.where(f>lim_val, f, np.log(np.exp(f) - 1.))
def gradfactor(self, f):