[FieldTrip] Missing templates for planar gradients

Fairs, Amie Amie.Fairs at mpi.nl
Tue Jul 17 09:57:48 CEST 2018

Dear FieldTrip list,

Apologies for what seems like a silly question. I am calculating the planar gradient for my MEG data because it was recorded from axial gradiometers (on a CTF system with a 275 layout). I'm following the FieldTrip tutorial to calculate the planar gradient, and I would like to use the method 'template' to do so, and then specify a pre-existing template. From reading about which templates are shipped with FieldTrip (http://www.fieldtriptoolbox.org/template/neighbours) I think a bunch of templates should be found in FieldTrip, including the CTF 275 neighbourhood template. However, in my FieldTrip version there are no templates (the template folder is just empty). When I run ft_prepare_neighbours, specifying cfg.template = 'template' and cfg.template = 'CTF275_neighb.mat', I get an error message saying 'Template file could not be found'. Does anyone know where I can get hold of this template? I can't find a way to download other than downloading a new version of FieldTrip and seeing if it is there.

The FieldTrip version I am using is fieldtrip-20170918 (so much after the 2011 template intro), on a Windows 7 computer, and matlab R2016a.

I also calculated the planar gradient using the method 'triangulation' to check it isn't a data bug somehow, but that works perfectly fine (though I'd prefer the template option).



Amie Fairs
PhD candidate
International Max Planck Research School for Language Sciences
Max Planck Institute for Psycholinguistics
PO Box 310 | 6500 AH Nijmegen | The Netherlands
Email: amie.fairs at mpi.nl<mailto:amie.fairs at mpi.nl> | Phone: +31(0)243521381

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