Eule
Newbie level 1
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
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
