[FieldTrip] Question regarding nonparametric testing for coherence differences

[Schoffelen, J.M. (Jan Mathijs)]

Hi Jack,

No, currently it is not possible to cluster data of dimensionality chan_chan_<something else>_<etc>. In older versions of the low-level code (findcluster) there were some lines of code (experimental) which have never been ‘active’ as such - i.e. they were not reachable when these functions were called from the higher level code. In the old days, if I remember well, Eric played around with channel-like clustering along more than one dimension, but the active development of this functionality was abandoned because it was hard to get it right. I have just finished a revision of the clustering code which will be released soon, where I actually haver removed those non-functional lines.

Best wishes,

Jan-Mathijs







On 19 Mar 2021, at 00:33, Jack Fogarty <jf752 at uowmail.edu.au<mailto:jf752 at uowmail.edu.au>> wrote:

Dear Prof Maris and Fieldtrip team,

Is there an established approach to clustering across channel x channel x frequency, as mentioned in this thread? I am hoping to try an exploratory between groups analysis of WPLI differences and it is unclear if the current fieldtrip functions behave when dealing with that complexity.

The ‘findcluster’ function seems well set up for matrices of chan x freq x time, but it is difficult to determine if it can handle chan x chan x freq appropriately, or if a new function is required altogether.

Any insight would be helpful thank you!

Jack Fogarty
PhD Student

T:  +61 4221 5547  |  E:  jf752 at uowmail.edu.au<mailto:jf752 at uowmail.edu.au>

Brain & Behaviour Research Institute
Psychophysiology Lab | School of Psychology | University of Wollongong
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