[Mne_analysis] magflat and gradflat in mne_process_raw

[Hari Bharadwaj]

Hi Candida,
   Perhaps you could make SSPs in 2 steps:
(1) Make a cov file for your blinks using a cov descriptor where you can
specify flat channel limits
(2) Use mne_cov2proj

Regards,
Hari




On Sat, September 8, 2012 8:07 am, Matti Hamalainen wrote:
>
> There is no way to specify the "flat" limits on the command line of
> mne_process_raw, unfortunately.
>
> However, in the Averaging preferences dialog (Adjust menu) of
> mne_browse_raw there are "no signal" limits  (flat parameters) which
> affect the interactive computation of the projection operators.
>
> - Matti
>
> On Sep 7, 2012, at 3:46 PM, Candida Jane Maria Ustine wrote:
>
>> Hello,
>>
>> I am working on removing the blink artifact using the PCA in mne. We
>> have a couple of subjects whose channels go flat for a few seconds(EEG,
>> MEG, EOG and ECG) including the stimuli. I was wondering if there is a
>> way to skip that part of the raw.fif file while using the
>> mne_process_raw command to create an EOG projector.
>>
>> I was wondering if this skip can be done when we create a projector just
>> like how we can introduce a descriptor file when we are creating
>> averages using mne_process_raw. I wanted to know of
>> gradflat/magflat/eegflat parameters can be included in the
>> mne_process_raw command. (I don't think this option is there in the
>> mne_browse_raw gui structure.)
>>
>> Do let me know if there is another way of omitting the blank data in the
>> fif file when creating a projector.
>>
>> Thanks,
>> Candida
>>
>> --
>> Candida Jane Maria Ustine M.Eng.
>> NeuroCognition Lab
>> Athinoula A. Martinos Center of Biomedical Imaging
>> Department of Psychiatry - Neurosciences
>> Massachusetts General Hospital
>> candida at nmr.mgh.harvard.edu
>>
>>
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>
> ---------
>
> Matti Hamalainen, Ph.D.
> Athinoula A. Martinos Center for Biomedical Imaging
> Massachusetts General Hospital
>
> msh at nmr.mgh.harvard.edu
> mhamalainen at partners.org
>
>
>
>
>
>
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-- 
Hari Bharadwaj
PhD Candidate, Biomedical Engineering,
Boston University
677 Beacon St.,
Boston, MA 02215

Martinos Center for Biomedical Imaging,
Massachusetts General Hospital
149 Thirteenth Street,
Charlestown, MA 02129

hari at nmr.mgh.harvard.edu
Ph: 734-883-5954