[FieldTrip] zero-padding VS mirror-padding (ft_freqanalysis)

Tzvetan Popov tzvetan.popov at uni-konstanz.de
Mon Sep 21 14:06:09 CEST 2015

> Hi,
> Thanks again for the suggestions, Tzvetan. 
> >I still don't know which one though, hence my previous 'mirror VS zero padding' question.
> >>Seems that you don?t have much of a baseline to begin with. Would frequency analysis also be an option?
> Perhaps I don't understand the question, but yes - I am doing frequency analysis.
Sorry, I meant frequency analysis and not time-frequency representation. The former isn#t dependent on the issues you have trouble with.
> The period of interest is the delay (3 sec) between two relatively short sensory stimulation periods (0.5sec).
> I do have a baseline - it is the time period prior to the "Stimulation-Delay-Stimulation" sequence. Besides that, I can also contrast different stimulation conditions without the need for a baseline.
> I am not sure how it relates to the first part of our discussion, but I guess a few more details can't hurt it either.
You’re right it drifts a bit. I don’t have much of an opinion/experience on zero vs. mirror padding. Data padding still seems feasible to me, say baseline onset to baseline offset? Then re-segment to "Simulation offset plus half of the sliding window” to “baseline onset minus half of the sliding window”.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20150921/5ad2e5e1/attachment-0002.html>

More information about the fieldtrip mailing list