[pymvpa] permutation distribution

[Yaroslav Halchenko]

On Wed, 10 Mar 2010, John Clithero wrote:
>    Hi PyMVPA users,
damn... I haven't actually USED it for a while... can't reply then I
guess ;)

>    cv_terr = CrossValidatedTransferError(
>                    TransferError(clf),
>                    NFoldSplitter(),
>                    enable_states=['dist_samples'],
>                    null_dist=MCNullDist(permutations=num_perm,tail='left'))
>    print 'Corresponding p-value : ', cv_terr.null_prob

>    How do I call the set of values that are used to calculate the p-value?
>    In other words, I'd like to plot all values from the permutations
>    (e.g., histogram).
>    "cv_terr.null_dist" does not seem to do the trick here.

move enable_states=['dist_samples'] into MCNullDist definition -- that
is where you want to get the actual values, right?
then simply run and access them from there:
cv_terr.null_dist.dist_samples

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