[pymvpa] Use case for recursive feature elimination

[Michael Waskom]

Hi Yarik,

Thanks!  The pointer to that test is very helpful indeed.

Best,
Mike

On Mon, Nov 1, 2010 at 2:02 PM, Yaroslav Halchenko <yoh at dartmouth.edu>wrote:

> Hi Mike,
>
> sorry that it causes you troble... but RFE is indeed somewhat difficult
> to figure out...
>
> but before anything:
> have you seen
> http://dev.pymvpa.org/featsel.html#recursive-feature-elimination
>
> also look may be at
> mvpa/tests/test_rfe.py:    def __test_matthias_question(self):
> which has one of RFE structures
>
> in general classifier with RFE as feature selection should be treated as
> any other classifier
>
> also -- do you really think that RFE is necessary in your case? may be
> some simpler feature selection or SMLR would do?
>
> P.S. it would be of greater benefit to everyone if we continue this
> communication on the mailing list, if you don't mind of cause
>
> On Mon, 01 Nov 2010, Michael Waskom wrote:
>
> >    Hey Yarik,
>
> >    I'm trying to figure out how to use the RFE class in pymvpa 0.5dev.
> >    Sadly, there doesn't seem to be much in the (otherwise
> >    super-helpful) documentation about it.  I get all of the parameters,
> >    but I'm not quite sure how it might fit into a typical analysis, and
> >    I'm very interested in trying out some recursive feature selection.
>  Do
> >    you have a simple use case you could put up as a gist (or elsewhere)
> so
> >    I can get the basic idea?  Nothing too didactic is required.
>
> >    Thanks!
>
> >    Mike
>
> --
> Yaroslav O. Halchenko
> Postdoctoral Fellow,   Department of Psychological and Brain Sciences
> 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
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.alioth.debian.org/pipermail/pkg-exppsy-pymvpa/attachments/20101101/0ad5f039/attachment.htm>