[FieldTrip] group average over time frequency analysis

[Tzvetan Popov]

Dear Philip,

The average over subjects is done by ft_timelockgrandaverage. Possible configuration option is  cfg.normalizevar = 'N' or 'N-1' (default = 'N-1’). You might consult the help of this function by typing help ft_timelockgrandaverage into the command window.
If by ‘normalisation’ you mean some sort of baseline correction, you should apply ft_timelockbaseline for each participant prior to the average over participants. 
Good luck,
tzvetan



> On 4 Mar 2022, at 16:44, philip Joadavi via fieldtrip <fieldtrip at science.ru.nl> wrote:
> 
> Hi all,
> 
> I have a short question for ft_grandaverage. I want to get the average of time frequency results over my subjects, and I was wondering if the function ft_grandaverage does do the normalization over subjects when it gets the mean value, or do we need to do the subject normalization separately before calling this function? 
> 
> Thanks a lot!
> Philip
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> https://doi.org/10.1371/journal.pcbi.1002202

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