[FieldTrip] ft_channelselection fails with negation and regex matching

[Stolk, A.]

Hi Kanal,

I've managed to replicate your bug with MEG data and we will try to sort this out.

Yours,
Arjen
----- "Kanal Eliezer" <ekanal at cmu.edu> schreef:

> Van: "Kanal Eliezer" <ekanal at cmu.edu>
> Aan: "Email FieldTrip project discussion list for the" <fieldtrip at donders.ru.nl>
> Verzonden: Donderdag 5 mei 2011 00:05:54
> Onderwerp: [FieldTrip] ft_channelselection fails with negation and regex	matching
>
> Hello fieldtrip -
> 
> We have a Elekta Neuromag 306 scanner, and I'm trying to select only
> the gradiometers. The magnetometers are labeled 'MEGxxx1', where x can
> be any number, and the gradiometers are either 'MEGxxx2' or 'MEGxxx3'.
> However, using ft_channelselection results in the following error:
> 
> ~~~~
> >> ft_channelselection({'all','-STI*','-MEG*1'}, cfg.hdr.label)
> ??? Matrix index is out of range for deletion.
> 
> Error in ==> ft_channelselection at 287
> channel([
> ~~~~
> 
> This error is somewhat complex, as I was able to determine that
> ft_channelselection recursively calls itself a number of times while
> running, and I was unable to figure out what is causing this problem.
> Any help would be appreciated. Thanks!
> 
> Eliezer Kanal
> 
> 
> --------------------
> Eliezer Kanal, Ph.D.
> Postdoctoral Fellow
> Center for the Neural Basis of Cognition
> Carnegie Mellon University
> 4400 Fifth Ave, Suite 110A
> Pittsburgh PA 15213
> P: 412-268-4115
> F: 412-268-5060
> 
> 
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