[pymvpa] Results from individual folds

[patrik andersson]

(The email bounced when I sent this question the first time so I try
again. I hope it wont show up as double.)

Hi all,

I am just getting started using PyMVPA so my question is very basic. I
am sure the answer must be available already but I just cant seem to
find it. Sorry about this, but I hope someone can help me out.
My question is how to get the classification results from the N
individual tests using the NFoldSplitter.

#Lets say I have a 10 chunks dataset 'ds' and run:
  clf = FeatureSelectionClassifier(
      LinearCSVMC(),
      SensitivityBasedFeatureSelection(
          OneWayAnova(),
      FractionTailSelector(0.05,mode='select',tail='upper')),
      descr="VA",
      enable_states = ['feature_ids'])

  terr = TransferError(clf)
  cvterr = CrossValidatedTransferError(terr,
                                     NFoldSplitter(cvtype=1),
                                     enable_states=['confusion'])

error = cvterr(ds)

#If I now do:
  print cvterr.confusion.asstring(description=True)
#it gives me one confusion matrix which I guess is the mean one over
all N folds(?)

Any hints or help is much appreciated!

Cheers,
Patrik