[FieldTrip] A shifting power peak artefact

[Schoffelen, J.M. (Jan Mathijs)]

Hi Ivo,

See: https://www.fieldtriptoolbox.org/faq/why_largest_peak_spectrum/, and https://www.fieldtriptoolbox.org/faq/why_does_my_tfr_look_strange/

Best wishes,
Jan-Mathijs




On 7 Dec 2022, at 14:40, Ivaylo Iotchev via fieldtrip <fieldtrip at science.ru.nl<mailto:fieldtrip at science.ru.nl>> wrote:

Dear community,

I want to rephrase one of my questions without first emphasizing my own theory of what is going on this time... what could cause the largest peak in the data to invariantly be at the frequency which is 1/segment length? That is, the peak is at 2 Hz when the segments are 0.5 seconds long... at 1 Hz when the segment is 1 second long etc. ...

I previously hypothesized that something might be preventing Fieldtrip from reading the sampling rate out of our data, but feel free to think outside the box I offer you, much appreciated, thanks in advance!

Bests,

Dr. Ivaylo (Ivo) Iotchev
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