Haven't seen it... from the abstract it sounds really close (if not identical) to what we do with null_dist in DatasetMeasure... we just don't have it conveniently exposed as FeatureSelection, since it is stored in null_prob state variable...
On Tue, 30 Sep 2008, Per B. Sederberg wrote: > In case y'all didn't see this... > P > ---------- Forwarded message ---------- > From: Sam Gershman <[EMAIL PROTECTED]> > Date: Tue, Sep 30, 2008 at 7:43 PM > Subject: new feature selection algorithm > To: [EMAIL PROTECTED] > Hi all, > Some people might be interested in this: > http://www.pnas.org/content/105/39/14790.full > It just came out in PNAS. The paper describes an algorithm for feature > selection called "higher criticism." It is designed for a particular > classification setting dubbed "rare/weak": where the fraction of > useful features is small and the useful features are each too weak to > be useful on their own. The idea is to look at the distribution of > feature statistics and use the deviation from an expected null > distribution to set the feature selection threshold. Although based in > frequentist statistics and therefore fundamentally flawed, it shows > some interesting behavior that could be highly advantageous to MVPA > applied to fMRI. Apart from its explicit designation for the R/W > setting (which is obviously apt for fMRI), it doesn't require tuning > by cross-validation and the threshold has low variance (which might be > good when looking for consistent feature sets). > Sam > _______________________________________________ > Pkg-ExpPsy-PyMVPA mailing list > [email protected] > http://lists.alioth.debian.org/mailman/listinfo/pkg-exppsy-pymvpa -- Yaroslav Halchenko Research Assistant, Psychology Department, Rutgers-Newark Student Ph.D. @ CS Dept. NJIT Office: (973) 353-5440x263 | FWD: 82823 | Fax: (973) 353-1171 101 Warren Str, Smith Hall, Rm 4-105, Newark NJ 07102 WWW: http://www.linkedin.com/in/yarik _______________________________________________ Pkg-ExpPsy-PyMVPA mailing list [email protected] http://lists.alioth.debian.org/mailman/listinfo/pkg-exppsy-pymvpa
