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Bug 2015 - defining gradiometer channels in the neuromag306

Reported 2013-02-27 19:24:00 +0100
Modified 2019-08-10 12:33:00 +0200
Product: FieldTrip
Component: preproc
Version: unspecified
Hardware: PC
Operating System: Linux
Importance: P3 minor
Assigned to:
Depends on: 2028
See also:

Hamid - 2013-02-27 19:24:37 +0100

In the neuromag306 system, if you want to extract only gradiometer channels using ft_preprocessing, you need something like ... = {'MEGGRAD'}; ... data = ft_preprocessing(cfg); therefore gradiometer sensors are identified by 'MEGGRAD', but in data.hdr.chantype the gradiometer channels are identified by 'megplanar'. It would be better to be consistent here and use 'MEGGRAD' or 'megplanar' throughout the toolbox. This may take sometimes of the user to understand this and select the gradiometer channel.

Robert Oostenveld - 2013-04-18 20:07:09 +0200

*** Bug 1823 has been marked as a duplicate of this bug. ***

Stephen Whitmarsh - 2013-09-05 14:08:48 +0200

Would like to bump this one.

Jan-Mathijs Schoffelen - 2016-07-05 21:06:33 +0200

not much happening here anytime soon, it seems.

Robert Oostenveld - 2019-08-10 12:33:00 +0200

This closes a whole series of bugs that have been resolved (either FIXED/WONTFIX/INVALID) for quite some time. If you disagree, please file a new issue on