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pep8'ed transformations module

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Max Zwiessele 2013-09-04 09:30:47 +01:00
parent 2558418b08
commit acb06941b4
3 changed files with 27 additions and 27 deletions
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32
GPy/core/transformations.py
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@ -7,7 +7,7 @@ from GPy.core.domains import POSITIVE, NEGATIVE, BOUNDED
import sys
lim_val = -np.log(sys.float_info.epsilon)
class transformation(object):
class Transformation(object):
domain = None
def f(self, x):
raise NotImplementedError
@ -24,7 +24,7 @@ class transformation(object):
def __str__(self):
raise NotImplementedError
class logexp(transformation):
class Logexp(Transformation):
domain = POSITIVE
def f(self, x):
return np.where(x>lim_val, x, np.log(1. + np.exp(x)))
@ -39,22 +39,22 @@ class logexp(transformation):
def __str__(self):
return '(+ve)'
class negative_logexp(transformation):
class Negative_logexp(Transformation):
domain = NEGATIVE
def f(self, x):
return -logexp.f(x) #np.log(1. + np.exp(x))
return -Logexp.f(x) # np.log(1. + np.exp(x))
def finv(self, f):
return logexp.finv(-f) #np.log(np.exp(-f) - 1.)
return Logexp.finv(-f) # np.log(np.exp(-f) - 1.)
def gradfactor(self, f):
return -logexp.gradfactor(-f)
return -Logexp.gradfactor(-f)
#ef = np.exp(-f)
#return -(ef - 1.) / ef
def initialize(self, f):
return -logexp.initialize(f) #np.abs(f)
return -Logexp.initialize(f) # np.abs(f)
def __str__(self):
return '(-ve)'
class logexp_clipped(logexp):
class LogexpClipped(Logexp):
max_bound = 1e100
min_bound = 1e-10
log_max_bound = np.log(max_bound)
@ -81,8 +81,8 @@ class logexp_clipped(logexp):
def __str__(self):
return '(+ve_c)'
class exponent(transformation):
# TODO: can't allow this to go to zero, need to set a lower bound. Similar with negative exponent below. See old MATLAB code.
class Exponent(Transformation):
# TODO: can't allow this to go to zero, need to set a lower bound. Similar with negative Exponent below. See old MATLAB code.
domain = POSITIVE
def f(self, x):
return np.where(x<lim_val, np.where(x>-lim_val, np.exp(x), np.exp(-lim_val)), np.exp(lim_val))
@ -97,20 +97,20 @@ class exponent(transformation):
def __str__(self):
return '(+ve)'
class negative_exponent(exponent):
class NegativeExponent(Exponent):
domain = NEGATIVE
def f(self, x):
return -exponent.f(x)
return -Exponent.f(x)
def finv(self, f):
return exponent.finv(-f)
return Exponent.finv(-f)
def gradfactor(self, f):
return f
def initialize(self, f):
return -exponent.initialize(f) #np.abs(f)
return -Exponent.initialize(f) #np.abs(f)
def __str__(self):
return '(-ve)'
class square(transformation):
class Square(Transformation):
domain = POSITIVE
def f(self, x):
return x ** 2
@ -123,7 +123,7 @@ class square(transformation):
def __str__(self):
return '(+sq)'
class logistic(transformation):
class Logistic(Transformation):
domain = BOUNDED
def __init__(self, lower, upper):
assert lower < upper