Hi Ronnie.
Please send any requests and questions to the main mailing list,
so that anyone can answer.
For you problem: I'm pretty sure you are not looking at the version of
the documentation
that corresponds to the version you have installed.
Which version do you have installed?
Best,
Andy
On 01/04/2013 11:22 PM, Ronnie Ghose wrote:
Should i submit a bug for
http://scikit-learn.org/0.12/modules/generated/sklearn.grid_search.GridSearchCV.html
as there is no best_params_ or best_score_ as far as I can see.
dir( GridSearchCV)
=====
['__class__', '__delattr__', '__dict__', '__doc__', '__format__',
'__getattribute__', '__hash__', '__init__', '__module__', '__new__',
'__reduce__', '__reduce_ex__', '__repr__', '__setattr__',
'__sizeof__', '__str__', '__subclasshook__', '__weakref__', '_fit',
'_get_param_names', '_set_methods', 'best_estimator_', 'cv',
'estimator', 'fit', 'fit_params', 'get_params', 'iid', 'loss_func',
'n_jobs', 'param_grid', 'pre_dispatch', 'refit', 'score',
'score_func', 'set_params', 'verbose']
Traceback (most recent call last):
File "/usr/lib/python2.7/runpy.py", line 162, in _run_module_as_main
"__main__", fname, loader, pkg_name)
File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
exec code in run_globals
File "/home/sghose/ADAPT/engine/engine.py", line 55, in <module>
main()
File "/home/sghose/ADAPT/engine/engine.py", line 50, in main
iris_gs()
File "/home/sghose/ADAPT/engine/engine.py", line 45, in iris_gs
print m.getBest()
File "ADAPT/genclf/model.py", line 197, in getBest
print [(k,e.best_params_) for k,e in self._gridENGINES.items()]
AttributeError: 'GridSearchCV' object has no attribute 'best_params_'
Traceback (most recent call last):
File "/usr/lib/python2.7/runpy.py", line 162, in _run_module_as_main
"__main__", fname, loader, pkg_name)
File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
exec code in run_globals
File "/home/sghose/ADAPT/engine/engine.py", line 55, in <module>
main()
File "/home/sghose/ADAPT/engine/engine.py", line 50, in main
iris_gs()
File "/home/sghose/ADAPT/engine/engine.py", line 45, in iris_gs
print m.getBest()
File "ADAPT/genclf/model.py", line 197, in getBest
print [(k,e.best_score_,e.best_score) for k,e in
self._gridENGINES.items()]
AttributeError: 'GridSearchCV' object has no attribute 'best_score_'
this is sort of weird since there IS a best_score in GridSearch but
it's local and part of the _fit() method
======
# Note: we do not use max(out) to make ties deterministic even if
# comparison on estimator instances is not deterministic
best_score = -np.inf
for score, params in scores:
if score > best_score:
best_score = score
best_params = params
if best_score is None:
raise ValueError('Best score could not be found')
self.best_score_ = best_score
self.best_params_ = best_params
if self.refit:
# fit the best estimator using the entire dataset
# clone first to work around broken estimators
best_estimator = clone(base_clf).set_params(**best_params)
best_estimator.fit(X, y, **self.fit_params)
self._best_estimator_ = best_estimator
self._set_methods()
======
(ignore the italics. my email client is acting up)
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