AW: [Mne_analysis] combine covariance matrix estimates for epoched data

[Wenzlaff, Hermine]

Dear Matti,

but I have 12 subjects and 12 conditions - don't want to do it manually. Best would be a function where imputfiles are the cov files (per run, if it exists) and outputfile is the gcov file. Does something like this exist?

Cheers,

Hermine



-----Ursprüngliche Nachricht-----
Von: Matti Hamalainen [mailto:msh at nmr.mgh.harvard.edu]
Gesendet: Do 09.10.2008 12:53
An: Wenzlaff, Hermine
Cc: Mne_analysis at nmr.mgh.harvard.edu
Betreff: Re: [Mne_analysis] combine covariance matrix estimates for epoched data
 

On Oct 9, 2008, at 6:45 AM, Wenzlaff, Hermine wrote:

> Dear all,
>
> my data consist of 4 runs per session. I calculated the covariance  
> matrix for epoched rawa data and want to average the covariance  
> matrix over the 4 runs. Usually this should work with --gcov.
>
> The problem is that in some runs there are too few / no trials so  
> that no covariance matrix is calculated. E.g., I might have  
> covariance matrixes from run 1 to 3 but not from 4. Then no grand  
> average covariance matrix file is calculated.
>
> How can I average over the covariance matrices "by hand"?
>
> Would be very thankful if somebody could answer soon.
>
Dear Hermine,

You can just run mne_process_raw again with run 4 left out.

- Matti



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