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From: Stefanie on 11 Feb 2010 06:04
Hey there,

I'm trying to compute a spectrogram on my EEG Data. Therefore I'm using the Chronux Toolbox and the function mtdspecgramc which computes a spectrogram based on a multitaper analysis. I can get it to work but I'm confused about the resulting spectrogram. It always only shows power changes for the frequency band set in the taper parameter. For example if I set the tapers to a time-bandwith product (Time in s*Width in Hz) to 10 and the No of sequences (maximal 2*TW-1) to 19, the spectrogram shows power changes for frequencies up to 19 Hz. If I set the taper parameters to [50 99], I see the same power spectrum smeered to 100 Hz. I don't know what I'm doing wrong or maybe I just misunderstood the use of tapers. I'll appreciate any help on this!

Thanks,
Stefanie
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