[pymvpa] SVM + RFE

[Arman Eshaghi]

Thanks a lot, I feel stupid and embarrassed right now ;)

All the best,
Arman


On Mon, Jan 27, 2014 at 10:15 PM, Yaroslav Halchenko
<debian at onerussian.com>wrote:

>
> On Mon, 27 Jan 2014, Arman Eshaghi wrote:
> >    Summary for chunks across targets
> >      chunks mean std min max #targets
> >        0     21   3   18  24     2
> >        1    27.5 2.5  25  30     2
>
> so that is the reason -- you have only 2 chunks.
>
> For such RFE setup you would need at least 3 since it tries to estimate
> (without picking) the stopping point by using cross-validation within
> the training set.  if training set contains only 1 chunk -- it can't
> split more...
>
> to overcome this you could partition each chunk more, e.g. assigned
> .sa['subchunks'] and specify to use that one instead of chunks
> in your splitter using in RFE definition.
>
> --
> Yaroslav O. Halchenko, Ph.D.
> http://neuro.debian.net http://www.pymvpa.org http://www.fail2ban.org
> Senior Research Associate,     Psychological and Brain Sciences Dept.
> Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755
> Phone: +1 (603) 646-9834                       Fax: +1 (603) 646-1419
> WWW:   http://www.linkedin.com/in/yarik
>
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