apunkt/GPy
1
0
Fork 0
mirror of https://github.com/SheffieldML/GPy.git synced 2026-06-08 15:05:15 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

separated out untransform_params, enabling flexibility downstream

Browse source
This commit is contained in:
James Hensman 2013-05-17 10:28:10 +01:00
parent f69dda71ea
commit cd6cc9b9b9
1 changed files with 13 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

14
GPy/core/parameterised.py
View file

@ -251,7 +251,18 @@ class parameterised(object):
def _set_params_transformed(self, x): def _set_params_transformed(self, x):
""" takes the vector x, which is then modified (by untying, reparameterising or inserting fixed values), and then call self._set_params""" """ takes the vector x, which is then modified (by untying, reparameterising or inserting fixed values), and then call self._set_params"""
self._set_params(self._untransform_params(x))
def _untransform_params(self,x):
"""
The transformation required for _set_params_transformed.
This moves the vector x seen by the optimiser (unconstrained) to the
valid parameter vector seen by the model
Note:
- This function is separate from _set_params_transformed for downstream flexibility
"""
# work out how many places are fixed, and where they are. tricky logic! # work out how many places are fixed, and where they are. tricky logic!
fix_places = self.fixed_indices + [t[1:] for t in self.tied_indices] fix_places = self.fixed_indices + [t[1:] for t in self.tied_indices]
if len(fix_places): if len(fix_places):
@ -272,7 +283,8 @@ class parameterised(object):
[np.put(xx,i,t.f(xx[i])) for i,t in zip(self.constrained_indices, self.constraints)] [np.put(xx,i,t.f(xx[i])) for i,t in zip(self.constrained_indices, self.constraints)]
if hasattr(self,'debug'): if hasattr(self,'debug'):
stop stop
self._set_params(xx)
return xx
def _get_param_names_transformed(self): def _get_param_names_transformed(self):
""" """