[Mne_analysis] Regularization of the noise covariance matrix with tSSSed data

[Ying Yang]

Hi MNE experts,

I am wondering whether it is common to regularize the noise covariance
matrix for tSSSed data. Since tSSS may reduce the rank of the sensor data,
(in my case to 64),  the covariance matrix is singular too.  As a result,
the whitened forward gain matrix had a lot of zeros.
 In this case, is it better to regularize the noise covariance matrix, or
to leave it intact such that the rank of noise matches the rank of
 "signal"?
Thanks in advance!

Best,
Ying
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20140717/0e207354/attachment.html