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clipping now upper bound adjustable

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This commit is contained in:
Max Zwiessele 2013-05-16 13:45:07 +01:00
parent d5c5c666a9
commit 23eaf12788
1 changed files with 4 additions and 2 deletions
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6
GPy/core/transformations.py
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@ -39,11 +39,13 @@ class logexp(transformation):
return '(+ve)'
class logexp_clipped(transformation):
def __init__(self, lower=1e-12):
def __init__(self, lower=1e-8, upper=1e200):
self.domain = 'positive'
self.lower = lower
self.upper = upper
def f(self, x):
f = np.log(1. + np.exp(x))
exp = np.exp(x)
f = np.log(1. + np.where(exp > self.upper, self.upper, exp))
return f
def finv(self, f):
return np.log(np.exp(f) - 1.)