Am 17.04.2012 15:45, schrieb Mathieu Blondel:
On Tue, Apr 17, 2012 at 10:31 PM, Olivier Grisel
<[email protected] <mailto:[email protected]>> wrote:
1- use C and scale_C=False by default and document extensively the
importance of scale_C=True when doing model selection with small
number of samples. (I am ok for the ugly warning in the grid search
class).
Setting scale_C to None by default and raising a warning in fit
whenever scale_C is still None is a good way to educate users. If they
want the warning to go away, they'll have to make an informed choice
and explicitly set scale_C to either False or True. We had this
discussion several times and couldn't reach a consensus so letting
users choose for themselves seems like the best bet (the warning
message should help users make the best decision depending on their need).
At least Dimitros did not seem to notice the warning about the behaviour
of scale_C he got. Or maybe it was not informative?
Dimitros, could you comment?
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