From 2da309aab88162cc8d219e8ad746cf7d3944fd87 Mon Sep 17 00:00:00 2001
From: Ricardo <acq11ra@sheffield.ac.uk>
Date: Wed, 5 Jun 2013 18:11:08 +0100
Subject: [PATCH] link_function class renamed as LinkFunction

---
 GPy/likelihoods/likelihood_functions.py |  6 +++---
 GPy/likelihoods/link_functions.py       | 11 +++++------
 GPy/models/fitc_classification.py       |  2 +-
 3 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/GPy/likelihoods/likelihood_functions.py b/GPy/likelihoods/likelihood_functions.py
index c801b9a9..7b9b8982 100644
--- a/GPy/likelihoods/likelihood_functions.py
+++ b/GPy/likelihoods/likelihood_functions.py
@@ -21,7 +21,7 @@ class LikelihoodFunction(object):
         if link == self._analytical:
             self.moments_match = self._moments_match_analytical
         else:
-            assert isinstance(link,link_functions.link_function)
+            assert isinstance(link,link_functions.LinkFunction)
             self.link = link
             self.moments_match = self._moments_match_numerical
 
@@ -79,7 +79,7 @@ class Binomial(LikelihoodFunction):
     $$
     """
     def __init__(self,link=None):
-        self._analytical = link_functions.probit
+        self._analytical = link_functions.Probit
         if not link:
             link = self._analytical
         super(Binomial, self).__init__(link)
@@ -146,7 +146,7 @@ class Poisson(LikelihoodFunction):
     def __init__(self,link=None):
         self._analytical = None
         if not link:
-            link = link_functions.log()
+            link = link_functions.Log()
         super(Poisson, self).__init__(link)
 
     def _distribution(self,gp,obs):
diff --git a/GPy/likelihoods/link_functions.py b/GPy/likelihoods/link_functions.py
index f3b48d21..cd5ae0c5 100644
--- a/GPy/likelihoods/link_functions.py
+++ b/GPy/likelihoods/link_functions.py
@@ -9,7 +9,7 @@ import pylab as pb
 from ..util.plot import gpplot
 from ..util.univariate_Gaussian import std_norm_pdf,std_norm_cdf
 
-class link_function(object):
+class LinkFunction(object):
     """
     Link function class for doing non-Gaussian likelihoods approximation
 
@@ -19,7 +19,7 @@ class link_function(object):
     def __init__(self):
         pass
 
-class identity(link_function):
+class Identity(LinkFunction):
     def transf(self,mu):
         return mu
 
@@ -29,7 +29,7 @@ class identity(link_function):
     def log_inv_transf(self,f):
         return np.log(f)
 
-class log(link_function):
+class Log(LinkFunction):
 
     def transf(self,mu):
         return np.log(mu)
@@ -40,7 +40,7 @@ class log(link_function):
     def log_inv_transf(self,f):
         return f
 
-class log_ex_1(link_function):
+class Log_ex_1(LinkFunction):
     def transf(self,mu):
         return np.log(np.exp(mu) - 1)
 
@@ -50,11 +50,10 @@ class log_ex_1(link_function):
     def log_inv_tranf(self,f):
         return np.log(np.log(np.exp(f)+1))
 
-class probit(link_function):
+class Probit(LinkFunction):
 
     def inv_transf(self,f):
         return std_norm_cdf(f)
 
     def log_inv_transf(self,f):
         return np.log(std_norm_cdf(f))
-
diff --git a/GPy/models/fitc_classification.py b/GPy/models/fitc_classification.py
index e2c48b69..65178c8c 100644
--- a/GPy/models/fitc_classification.py
+++ b/GPy/models/fitc_classification.py
@@ -16,7 +16,7 @@ class FITCClassification(FITC):
 
     :param X: input observations
     :param Y: observed values
-    :param likelihood: a GPy likelihood, defaults to Binomial with probit link_function
+    :param likelihood: a GPy likelihood, defaults to Binomial with probit link function
     :param kernel: a GPy kernel, defaults to rbf+white
     :param normalize_X:  whether to normalize the input data before computing (predictions will be in original scales)
     :type normalize_X: False|True