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faq:what_convention_is_used_to_define_absolute_phase_in_mtmconvol_wavelet_and_mtmfft [2013/05/22 12:07]
roemervandermeij created
faq:what_convention_is_used_to_define_absolute_phase_in_mtmconvol_wavelet_and_mtmfft [2017/08/17 11:21] (current)
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 +  * In **mtmconvol** and **wavelet** an angle of 0 of any fourier-coefficient means a peak of an oscillation in the data, and an angle of pi/-pi will always mean the trough of an oscillation (wavelet wise angle = 0 is implemented as cosine at peak, and sine in up-going flank)
 +  * In **mtmfft** each Fourier-coefficient is phase-shifted such that the angle is from the perspective of the oscillation in the data being at its peak at time = 0. This means that when computing Fourier-coefficients,​ the (possibly variable) onset of each trial is taken into account.