[pymvpa] Customize ANOVA Feature Selection
Yaroslav Halchenko
debian at onerussian.com
Mon Oct 3 16:14:29 UTC 2011
I might be missing the problem since you seem to have to know the blocks
you need ;) so following the example from the clfs warehouse:
FeatureSelectionClassifier(
kNN(),
SensitivityBasedFeatureSelection(
OneWayAnova(),
FractionTailSelector(0.05, mode='select', tail='upper')),
descr="kNN on 5%(ANOVA)")
logical change would be to use 0.99 instead of 0.05 to select 99% top voxels
(or in other words to dump 1%)... or just change mode to 'discard' and specify
0.01 as the fraction
On Mon, 03 Oct 2011, Roberto Guidotti wrote:
> Hi all,
> I would like to know if there is a method to extract the feature
> ranking from ANOVA feature selection or if there is a method to drop
> first 1% of voxel included in the ranking and select other voxel as
> usual (with FractionTailSelection()).
> Thank you
> Roberto
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