[Eeglablist] newtimef automated stepsize?

[Baker, Joshua]

Dear list,

When using the newtimef function in eeglab (cycles=0, using STFFTs), and you do not specify winsize or stepsize, how does the algorithm chose them? Also, how is it that a TF image when using STFFTs shows variations in low frequencies at a time scale that is too small to fully capture a full cycle of the frequency? For example, if you define freqs as [3 50], and a 250ms window size is chosen by the algorithm, to estimate power at 3 hz, you would require a 333 ms time window to capture a full cycle. How is it that the TF image can show fluctuations in 3Hz power within a 200ms segment of time?

Thanks for your help


Joshua Baker
Psychology Technician (Behavioural Neuroscience)
Psychology
Nottingham Trent University

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