[FieldTrip] FT_analysis of the average vs average(FT_analysis(single trials))

jan-mathijs schoffelen jan.schoffelen at donders.ru.nl
Wed May 11 10:56:10 CEST 2011

Dear Tommaso,

Yes, if you average across the trial-dimension you will obtain the TFR  
you're after.



On May 6, 2011, at 5:28 PM, tommaso fedele wrote:

> Hi all,
> I want to test if some component that I observe in the average of my  
> ERP signal are phase locked to the stimulus.
> In oder to do so I compare
> 1. TFR_averaged_signal =  ft_freqanalysis(cfg, averaged_signal)
> 2. TFR_singletrials_signal =  ft_freqanalysis(cfg,  
> singletrials_signal)
> with the first structure TFR_averaged_signal everything is fine, and  
> I get my nice TF plot.
> with the second I should average through "trials". Is there a  
> function for that? Or, is it correct to proceed plotting
> the average of  TFR_singletrials_signal.powspctrm through the  
> "trials-matrix dimension"?
> Thanks
> Tommaso
> _______________________________________________
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> fieldtrip at donders.ru.nl
> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip

Dr. J.M. (Jan-Mathijs) Schoffelen
Donders Institute for Brain, Cognition and Behaviour,
Centre for Cognitive Neuroimaging,
Radboud University Nijmegen, The Netherlands
J.Schoffelen at donders.ru.nl
Telephone: 0031-24-3614793

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