2011/10/4 Gael Varoquaux <[email protected]>:
> By the way, why we are modifying this `permutation_test_score` function,
> it seems to me that the `score_func` argument should be optional, and
> that without it, the `permutation_test_score` should try to use the
> estimator's score. In such a situation, as such a score should always be
> `bigger is better`, people shouldn't fall in the trap in which Satra has
> fallen.
>
> What do people think? Should I implement that (trivial) change?

It returns several stuff: the array of scores and the p-value. In the
array of scores the "bigger is better" rule is respected.

But yeah this is not a real "_score" function as it does not return a
single scalar float. The same holds for cross_val_score which also
returns an array.

Maybe we should just rename then to "permutation_test_scores" and
"cross_validation_scores" (plural) to make this more specific?

-- 
Olivier
http://twitter.com/ogrisel - http://github.com/ogrisel

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