[pymvpa] RSA/RDM cross-validated mahalanobis

[Matteo Visconti di Oleggio Castello]

Yes, you should be able to use it within searchlights as any other Measure
class. Unfortunately, I do not think that it can support a varying
covariance matrix at the moment, which makes it less ideal to work with
Mahalanobis distances. We should augment that to allow such option.

On Tue, Apr 25, 2017 at 12:44 PM, basile pinsard <basile.pinsard at gmail.com>
wrote:

> Hi Matteo,
>
> thanks, that's great, I will give it a try.
> Also do you think this can be used in a Searchlight?
> Even with varying kwargs to give the spatial covariance matrix in case of
> mahalanobis?
>
> Thank you.
>
> Basile
>
> On Tue, Apr 25, 2017 at 12:13 PM, Matteo Visconti di Oleggio Castello <
> matteo.visconti at gmail.com> wrote:
>
>> Hi Basile,
>>
>> the new release of PyMVPA 2.6.1 introduces mvpa2.measures.rsa.CDist, that
>> allows you to compute cross-validated RSA (https://github.com/PyMVPA/PyM
>> VPA/blob/master/mvpa2/measures/rsa.py#L27), and you can specify which
>> distance metric you want to use, with additional kwargs.
>>
>> Matteo
>>
>> On Tue, Apr 25, 2017 at 11:14 AM, basile pinsard <
>> basile.pinsard at gmail.com> wrote:
>>
>>> Hi PyMVPA developers and users.
>>>
>>> I was wondering if there was a way in PyMVPA to use the approaches
>>> described in this paper:
>>> "Reliability of dissimilarity measures for multi-voxel pattern analysis"
>>> were the use of cross-validated mahalanobis distance is advocated in
>>> favor of correlation based RSA measures.
>>>
>>> Thank you.
>>>
>>> --
>>> Basile Pinsard
>>>
>>> *PhD candidate, *
>>> Laboratoire d'Imagerie Biomédicale, UMR S 1146 / UMR 7371, Sorbonne
>>> Universités, UPMC, INSERM, CNRS
>>> *Brain-Cognition-Behaviour Doctoral School **, *ED3C*, *UPMC, Sorbonne
>>> Universités
>>> Biomedical Sciences Doctoral School, Faculty of Medicine, Université de
>>> Montréal
>>> CRIUGM, Université de Montréal
>>>
>>> _______________________________________________
>>> Pkg-ExpPsy-PyMVPA mailing list
>>> Pkg-ExpPsy-PyMVPA at lists.alioth.debian.org
>>> http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-
>>> exppsy-pymvpa
>>>
>>
>>
>>
>> --
>> Matteo Visconti di Oleggio Castello
>> Ph.D. Candidate in Cognitive Neuroscience
>> Dartmouth College
>>
>> +1 (603) 646-8665 <(603)%20646-8665>
>> mvdoc.me <http://www.mvdoc.me/> || linkedin.com/in/matteovisconti ||
>> github.com/mvdoc
>>
>> _______________________________________________
>> Pkg-ExpPsy-PyMVPA mailing list
>> Pkg-ExpPsy-PyMVPA at lists.alioth.debian.org
>> http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-exppsy-pymvpa
>>
>
>
>
> --
> Basile Pinsard
>
> *PhD candidate, *
> Laboratoire d'Imagerie Biomédicale, UMR S 1146 / UMR 7371, Sorbonne
> Universités, UPMC, INSERM, CNRS
> *Brain-Cognition-Behaviour Doctoral School **, *ED3C*, *UPMC, Sorbonne
> Universités
> Biomedical Sciences Doctoral School, Faculty of Medicine, Université de
> Montréal
> CRIUGM, Université de Montréal
>
> _______________________________________________
> Pkg-ExpPsy-PyMVPA mailing list
> Pkg-ExpPsy-PyMVPA at lists.alioth.debian.org
> http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-exppsy-pymvpa
>



-- 
Matteo Visconti di Oleggio Castello
Ph.D. Candidate in Cognitive Neuroscience
Dartmouth College

+1 (603) 646-8665
mvdoc.me <http://www.mvdoc.me/> || linkedin.com/in/matteovisconti ||
github.com/mvdoc
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