Time Frequency Analysis!

Christian Hesse c.hesse at FCDONDERS.RU.NL
Mon Feb 19 11:56:19 CET 2007

Hi Muthuraman,

> One more question regarding the Time frequency Analysis, i have EMG
> data of 24000 data points with a sampling frequeny of 800Hz(30
> seconds of continous data). I would like to do the Timefrequency
> analysis for this data and to see the power for the whole 30 seconds

use preprocessing to get the EMG data into a single 30s trial (if you
want to analyze the rectified EMG, then do the rectification in
preprocessing), then use frequanalysis with

cfg.method = 'mtmfft';
cfg.output = 'pow';

this should give you the power spectrum of your EMG data over the
entire 30 second period.


Christian Hesse, PhD, MIEEE

F.C. Donders Centre for Cognitive Neuroimaging
P.O. Box 9101
NL-6500 HB Nijmegen
The Netherlands

Tel.: +31 (0)24 36 68293
Fax: +31 (0)24 36 10989

Email: c.hesse at fcdonders.ru.nl
Web: www.fcdonders.ru.nl

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