[pymvpa] classification selection

Yaroslav Halchenko debian at onerussian.com
Tue Jun 14 22:24:50 UTC 2016

On Tue, 14 Jun 2016, Liang, Guangsheng wrote:

>    Hello PyMVPA community,

>    I just start using PyMVPA for some fMRI data analysis, and I got a
>    question about classification selection.

>    I firstly used LinearCSVMC as my initial classifier, but it ran very very
>    slow (it kept running for more than 2 weeks).

>    I am not quite sure where did I go wrong.  I then used another classifier
>    - kNN. It ran much faster than the LinearCSVMC.

>    I was wondering if there was any restriction or cautions on using kNN for
>    fMRI data analysis?

it all depends on details of your study...   at least having a clue
(print your_ds.summary()) could be of help.

Yaroslav O. Halchenko
Center for Open Neuroscience     http://centerforopenneuroscience.org
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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