[Mne_analysis] mne_process_raw problem

[Nandita Shetty]

Hi Sarah,

Also, it could be possible that you are getting this error message because
 there are too few samples to calculate the noise cov matrix.

I am guessing if you invoke mne_process_raw ONLY to calculate the grand
average, it should execute OK.

~N&ita

> Hi Sarah,
>
> One idea is to check in your off-line averaging description file the
> *Reject parameters since maybe they are too high and thus all your epochs
> are being rejected.
>
> Before doing the offline averaging you should do it online
> (mne_browse_raw), changing these values in Adjust/Averaging preferences to
> be sure you will get some.
>
> Hope this helps,
>
> -- Andrés
>
>> Hi,
>>
>> I am having a problem in one subject when trying to average raw files
> (and computing a noise covariance matrix) with mne_process_raw. I sent an
> mail about this a while ago but did not hear back and all my attempts to
> solve this problem myself failed.
>>
>> The error message says:
>> "Event file is in the old format. Taking into account offset of 135000
> samples
>> Read 714 events from SBT_MEG_005_run1_converted.eve
>> Computing...
>> Too few samples (required : 1885 got : 0)"
>>
>> My understanding of this error message is that mne does not find events
> listed in the event file that match events in the raw file. However, the
> events listed in the event file do match events on the trigger channel
> (STI 014). Played around with the event file using non-modified event
> files and event files in the old and new format did not lead to any
> success, nor did excluding runs separately or excluding EEG from the raw
> files (the EEG looked not nice because the subject was sweating a lot).
> Running the old mne version did not change anything either.
>> I have run the same command in other subjects without problems.
>>
>>
>> Any help with this is greatly appreciated!
>> thanks, Sarah
>>
>>
>> _______________________________________________
>> Mne_analysis mailing list
>> Mne_analysis at nmr.mgh.harvard.edu
>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis
>>
>>
>>
>
>
> --
> Andres F. Salazar
> Research Technologist
> Neuroscience Statistics Research Laboratory
> asalazar at nmr.mgh.harvard.edu
> 149 13th Street, Room 4005
> Charlestown, MA  02129
>
>
>
>
>
> _______________________________________________
> Mne_analysis mailing list
> Mne_analysis at nmr.mgh.harvard.edu
> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis
>
>
>