[FieldTrip] Clustering algorithm used in sourcestatistics (montecarlo)

[Mikołaj Magnuski]

Hey Michał,

by default it clusters effects that are adjacent (in time, space, frequency
- depending on your search space) above some treshold. The adjacency in
space is defined by adjacency matrix (or more precisely cfg.neighbours
structure).
Take a look at fieldtrip tutorials about nonparametric cluster-based
permitation tests - there should be a reference to the Maris, Oostenveld
2007 paper too.

28.02.2017 11:47 AM "Michał Komorowski" <michak at is.umk.pl> napisał(a):

> Hey,
>
> Not exactly.
> Function 'clusterstat' takes advantage of 'spm_bwlabel' function to
> clusterize data, then it computes a cluster-level statistic.
>
> I want to know what algorithm is used: k-means? DBSCAN? Other ?
>
> Thank you for your fast reply.
>
> 2017-02-28 11:13 GMT+01:00 Maité Crespo García <maity_winky at yahoo.es>:
>
>> Hi Michal,
>>
>> The 'ft_statistics_montecarlo' uses as default the maxsum statistic and
>> the algorithms for clustering are in the 'clusterstat' function, inside the
>> private folder. Is that what you mean?
>>
>> Best wishes,
>> Maité
>>
>>
>> El Martes 28 de febrero de 2017 1:40, Michał Komorowski <michak at is.umk.pl>
>> escribió:
>>
>>
>>
>>
>> Dear Fieldtrippers,
>>
>> Does anybody know what clustering algorithm is used
>> in ft_statistics_montecarlo (ft_sourcestatistics with cfg.correctm =
>> 'cluster') when analysing data from ft_sourceanalysis?
>>
>> It seems like spm_bwlabel function is used, but I have not found an open
>> source.
>>
>> Any help would be greatly appreciated.
>>
>> --
>> Michał Komorowski, MSc
>> Nicolaus Copernicus University in Toruń
>> Faculty of Physics, Astronomy and Informatics
>> Department of Informatics
>>
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>>
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>
>
>
> --
> Michał Komorowski, MSc
> Nicolaus Copernicus University in Toruń
> Faculty of Physics, Astronomy and Informatics
> Department of Informatics
>
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> fieldtrip mailing list
> fieldtrip at donders.ru.nl
> https://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>

-- 

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