apunkt/GPy
1
0
Fork 0
mirror of https://github.com/SheffieldML/GPy.git synced 2026-05-09 20:12:38 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

minor modifications to the constraint behaviour

Browse source
This commit is contained in:
James Hensman 2013-05-10 16:39:20 +01:00
parent e60eb4e236
commit a91501af56
1 changed files with 9 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

10
GPy/core/transformations.py
View file

@ -34,6 +34,8 @@ class logexp(transformation):
ef = np.exp(f)
return (ef - 1.)/ef
def initialize(self,f):
if np.any(f<0.):
print "Warning: changing parameters to satisfy constraints"
return np.abs(f)
def __str__(self):
return '(+ve)'
@ -48,6 +50,8 @@ class exponent(transformation):
def gradfactor(self,f):
return f
def initialize(self,f):
if np.any(f<0.):
print "Warning: changing parameters to satisfy constraints"
return np.abs(f)
def __str__(self):
return '(+ve)'
@ -62,6 +66,8 @@ class negative_exponent(transformation):
def gradfactor(self,f):
return f
def initialize(self,f):
if np.any(f>0.):
print "Warning: changing parameters to satisfy constraints"
return -np.abs(f)
def __str__(self):
return '(-ve)'
@ -79,7 +85,9 @@ class logistic(transformation):
def gradfactor(self,f):
return (f-self.lower)*(self.upper-f)/self.difference
def initialize(self,f):
return self.f(f*0.)
if np.any(np.logical_or(f<self.lower,f>self.upper)):
print "Warning: changing parameters to satisfy constraints"
return np.where(np.logical_or(f<self.lower,f>self.upper),self.f(f*0.),f)
def __str__(self):
return '({},{})'.format(self.lower,self.upper)