[FieldTrip] grandaveraging EEG question

[Herring, J.D. (Jim)]

Hi Dave,

I would read in, and preprocess, the two files per subject and run ft_appenddata to combine the data from both files. Then I would run ft_timelockanalysis to get the erps for each condition. As soon as you have done this for all subjects, run ft_timelockgrandaverage to get the group averaged erps.

Best,

Jim

> On 4 apr. 2014, at 19:38, Dave Britton <dave at davebritton.com> wrote:
> 
> I have EEG data that consist of two separate file sets for each subject, and 20 subjects. When I process this to get ERPs for various conditions, does it matter if I just use ft_appenddata to concatenate all 40 files together and then run ft_timelockanalysis on the result, or should I use ft_grandaverage to combine the two runs for each subject, using the "within" parameter" and then combine the 20 resulting grandaverages with another call to ft_grandaverage using the "between parameter?
> -Dave
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