[pymvpa] pymvpa one-class svm

J.A. Etzel jetzel at artsci.wustl.edu
Wed Jan 21 22:16:50 UTC 2015

I'd be tempted to consider task vs. rest a two-class problem - task and 


On 1/21/2015 4:12 PM, basile pinsard wrote:
> Hi pyMVPA!
> does anyone has ever tried to use one-class SVM (or other 1-class
> classifier) in PyMVPA.
> I tried using :
> SVM(svm_impl='ONE_CLASS')
> but I am not sure what are the targets supposed to be: boolean or {-1,1}
> I do not know if the wrapper passes to training only the positive
> samples or not? while in a cross-validation scheme we would test on full
> dataset to find false-positives.
> I also tried using sklearn.svm.OneClassSVM:
> SKLLearnerAdapter(OneClassSVM(kernel='linear'))
> I am specifically interested in classifying a task vs. rest which is why
> I aim at one-class.
> Thanks for your advices or ideas.
> Regards
> basile
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Joset A. Etzel, Ph.D.
Research Analyst
Cognitive Control & Psychopathology Lab
Washington University in St. Louis

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