[Mne_analysis] Multitaper Beamformer (DICS)

[Brunner, Clemens (clemens.brunner@uni-graz.at)]

        External Email - Use Caution        

Hello Yuki!

Please consider posting your question on our forum:

https://secure-web.cisco.com/1J627uGDglVXqT_LxsIj6X_BVZIaT-UjpWKS6aeWPrqB1hUexvt2BvpUyTUhMQY9nTlHOk9Ky2NVIQ5S3l-_UsplPC065stVS6diT6XmSn2ihfHGZjqrjbrWHXmku_PhIyu5DNUfQsghlHwce7aNxztOpH7KbQPmjg8Gztc5cZh_HyIdnOgFDjVf3ht6-o7wnAusXjBS5PelX-qAPkqTFg9b94i6FDDm1JPzD3cyfu8qltrl2USPF3GcEp6WqzZT2ndoKgxJzKWd3spZ_KmwTvw/https%3A%2F%2Fmne.discourse.group%2F

Many people read the questions there, so it is much more likely you will get an answer which is also visible to other MNE users.

Thanks!
Clemens


> On 13.06.2021, at 08:21, Yuki <yfujishima1001 at gmail.com> wrote:
> 
>         External Email - Use Caution        
> 
> 
> Hello MNE team,
> 
> Thank you always for your great work and support.
> 
> I would like to ask you about conducting multitaper time-frequency analysis in the source domain using beamformer (DICS). From my understanding, in mne.time_frequency.csd_multitaper, one specifies fmin & fmax, and the function computes the CSD at frequencies obtained from scipy.fft.rfftfreq(n_times, sample_frequency) that are between fmin and fmax.
> 
> On the other hand, in mne.time_freuqency.tfr_multitaper, one can put any frequencies at which they want to compute multitaper analysis.
> 
> What is the difference between csd_multitaper and tfr_multitaper in terms of performing multitaper analysis? I assume that the power spectrum by DFT will be computed at the frequencies obtained from scipy.fft.rfftfreq with a given number of time points and sample frequency. I used tfr_multitaper by sliding a fixed time window (0.3 s) across time points at each frequency bin I specified (from 4Hz to 98Hz with 3/4 octave frequency smoothing) to analyze at the sensor domain, and I wish to do something similar in the source domain. I would appreciate if you could give me some advice.
> 
> Warmly,
> Yuki
> 
> 
> -- 
> --
> Yuki Fujishima, M.D.
> Junior Resident
> Kyushu University Hospital
> _______________________________________________
> Mne_analysis mailing list
> Mne_analysis at nmr.mgh.harvard.edu
> https://secure-web.cisco.com/1msGyv5i21ua_XkSx1ytWfKVqQczhwjiY0xjCqe_PC2gXb-fqr4EGkufhAeqzVjUe2840GSRaZMkMd3ESslzh2YTr8i8Us7ud8SQRCngBKAatVZIYx7PVDcnPEGC_-oojL4-GMNDZU8eYUpj5LZVBZ9eTnwglwbnX8O4QFroz5WKz7-xVCexO1N1NqBqwrZM2Z7Hy781KI8xjHQQj3Jix7G8anRIwICOyyzzlJNcogaZZ9oZWbW30kB0mbHOLnLJBnowbGXIbvmPG7Vc5j1GeAQ/https%3A%2F%2Fmail.nmr.mgh.harvard.edu%2Fmailman%2Flistinfo%2Fmne_analysis