[FieldTrip] Changed phase convention 'wavelet' ('wltconvol')
Roemer van der Meij
r.vandermeij at donders.ru.nl
Wed Apr 20 20:16:25 CEST 2011
We have changed the meaning of phases of /raw/ Fourier-coefficients of
method = 'wavelet' (previously 'wltconvol'), so that it is in alignment
with method = 'mtmconvol'.
All output is now phase-shifted such that an angle of 0 of any
Fourier-coefficient always 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) (also documented in the FAQ section here
Processed phases, like those in a cross-spectral density array and it's
children like coherence, PLVs etc., will /not /be different. You will
only notice the difference if you choose cfg.output = 'fourier'.
The change will be latest version on our FTP-server tonight.
Roemer van der Meij M.Sc.
Donders Institute for Brain, Cognition and Behaviour
Centre for Cognition
Radboud University Nijmegen
P.O. Box 9104
6500 HE Nijmegen
Tel: +31(0)24 3655932
E-mail: r.vandermeij at donders.ru.nl
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the fieldtrip