[Eeglablist] detrending with SIFT

[Tyler Grummett]

Hello eeglabers,


I have a question about detrending in SIFT.


I run the following code:


EEG = pop_pre_prepData( EEG, 'nogui', ...
                'VerbosityLevel', 2,   ...
                'SignalType', { 'Channels'},  ...
                'Detrend',  ...
                { 'verb', 2 ...
                'method', {'linear'}, ...
                'piecewise', ...
                {'seglength', 0.33,   ...
                'stepsize', 0.0825}, ...
                'plot', strcmp( plot, 'on')},  ...
                'NormalizeData', ...
                {'verb', 2 ...
                'method', {'time' 'ensemble'}}, ...
                'resetConfigs',true);?

It works fine, but I do an is equal on the data before and after and they are identical.

Im thinking this cant be correct because it should be removing a significant proportion of my data.
I went through the code and it appears as though it is storing the data in EEG.CAT. Have I missed
something or am I doing it correctly?

Kind regards,

Tyler



*************************

Tyler Grummett ( BBSc, BSc(Hons I))
PhD Candidate
Brain Signals Laboratory
Flinders University
Rm 5A301
Ext 66125
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