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logexp_clipped adjust & mrd error messages

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Max Zwiessele 2013-05-22 17:52:09 +01:00
parent 8f5d577bbb
commit 4ef29e1fea
3 changed files with 6 additions and 5 deletions
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6
GPy/core/transformations.py
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@ -39,7 +39,7 @@ class logexp(transformation):
return '(+ve)'
class logexp_clipped(transformation):
max_bound = 1e300
max_bound = 1e100
min_bound = 1e-10
log_max_bound = np.log(max_bound)
log_min_bound = np.log(min_bound)
@ -53,11 +53,11 @@ class logexp_clipped(transformation):
# import ipdb;ipdb.set_trace()
return np.clip(f, self.min_bound, self.max_bound)
def finv(self, f):
return np.log(np.exp(np.clip(f, self.min_bound, self.max_bound)) - 1.)
return np.log(np.exp(f - 1.))
def gradfactor(self, f):
ef = np.exp(f) # np.clip(f, self.min_bound, self.max_bound))
gf = (ef - 1.) / ef
return np.where(f < self.lower, 0, gf)
return gf # np.where(f < self.lower, 0, gf)
def initialize(self, f):
if np.any(f < 0.):
print "Warning: changing parameters to satisfy constraints"