[Eeglablist] Average topoplots

[Delorme, Arnaud]

Dear Sean,

Yes, producing topoplot in the frequency or time-frequency domain across subjects is exactly what STUDY level analysis does. I would invite you to have a lot at the tutorial (the whole part II https://sccn.ucsd.edu/wiki/EEGLAB#The_EEGLAB_Tutorial_Outline) but more specifically this section

https://sccn.ucsd.edu/wiki/Chapter_06:_Study_Statistics_and_Visualization_Options

Best wishes,

Arno

> On Jul 18, 2020, at 1:24 PM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu> wrote:
> 
> Dear Sean,
> 
> Hmm I'm not 100% sure, but you may find this code useful to understand how
> spectopo() could be used.
> https://sccn.ucsd.edu/wiki/Makoto's_useful_EEGLAB_code#Batch-process_all-channel_PSDs_in_both_dB_and_uV.5E2.2FHz_.2803.2F17.2F2020_updated.29
> 
> 
> Makoto
> 
> On Tue, Jul 14, 2020 at 1:53 PM Sean Gilmore <sean.gilmore at ryerson.ca>
> wrote:
> 
>> To list,
>> 
>> I have an repeated measures experiment that has 26 participants, and 6
>> different trials. I have FFT data for each participant and each trial. I
>> would like to make average topoplots for each trial (averaging across
>> participants) that reflect the activity at a specific frequency (1.25 Hz).
>> 
>> For a single participant I am able to extract a vector of amplitudes
>> across channels. I can use this along with EEG.chanlocs to create a
>> topoplot for each trial. However, I now need how to create topoplots that
>> reflect the average (across participants) activity at 1.25 Hz for each
>> trial.
>> 
>> Does anyone know what the best way to do this is?
>> 
>> Is there a way that I can use the output of the topoplot() function to
>> create averages across participants?
>> 
>> Any help/suggestion would be greatly appreciated.
>> -
>> Sean Gilmore, M.A. (PhD candidate)
>> Department of Psychology
>> SMART lab
>> Ryerson University
>> 
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