apunkt/GPy
1
0
Fork 0
mirror of https://github.com/SheffieldML/GPy.git synced 2026-05-10 04:22:38 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

clipping now upper bound adjustable

Browse source
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
Download patch file Download diff file Expand all files Collapse all files

6
GPy/core/transformations.py
View file

@ -39,11 +39,13 @@ class logexp(transformation):
return '(+ve)' return '(+ve)'
class logexp_clipped(transformation): class logexp_clipped(transformation):
def __init__(self, lower=1e-12): def __init__(self, lower=1e-8, upper=1e200):
self.domain = 'positive' self.domain = 'positive'
self.lower = lower self.lower = lower
self.upper = upper
def f(self, x): 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 return f
def finv(self, f): def finv(self, f):
return np.log(np.exp(f) - 1.) return np.log(np.exp(f) - 1.)