[Mne_analysis] event file and noise covariance matrix

[Junpeng.zhang@gmail.com]

Hi Alex, 


As you guess, the engineer told me that the stim channel is STI101. 
I start using the command 
mne_browse_raw --digtrig STI101 
and then load the *sss.fif


The response is, 


674 events found in /mnt/share/Huang_zhaoyang_MEG/Yang_Yingxue_MEG_data/MEG/MYB/mi_yu_bi_SEF_R_20120106_raw_tsss-eve.fif
Trigger channel : STI101 max_event : 0



in fact, the data is collected from an experiment: stimulus to the left and right median nerve and there should be two kinds of events. 
But when I click "show event list",  the event list is blank! 


The engineer told me that 


The left wrist stimulus in STI101 is 192, and right is 194. But why the response is max_event =0?


I also tried to click the average button to average the data over event 1 or 2, 
and the response as, 


Single category : 
	stim ignore : off
	grad reject : 2000.0 fT/cm
	mag  reject : off
	EEG  reject : off
	EOG  reject : off
	ECG  reject : off
	grad flat : off
	mag  flat : off
	EEG  flat : off
	EOG  flat : off
	ECG  flat : off
	Do not fix trigger skew
	Average to trigger # 1 : 
		t = -200.0 ... 500.0 ms
		event = 1
		ignore = 0
		nave  = 0





Would you like to help me figure out it?


Best wishes, 
Junpeng 












------------------ Original ------------------
From:  "Alexandre Gramfort"<gramfort at nmr.mgh.harvard.edu>;
Date:  Tue, Apr 2, 2013 03:00 PM
To:  "Junpeng.zhang at gmail.com"<junpeng.zhang at gmail.com>; 
Cc:  "mne_analysis at nmr.mgh.harvard.edu"<mne_analysis at nmr.mgh.harvard.edu>; 
Subject:  Re: [Mne_analysis] event file and noise covariance matrix



hi Junpeng,

what you need to average in an event file (-eve.fif file) or a stim channel.

You can start mne_browse_raw with the --digtrig option to set a specific channel
if different from STI014.

HTH
Alex

On Tue, Apr 2, 2013 at 6:31 AM, Junpeng.zhang at gmail.com
<junpeng.zhang at gmail.com> wrote:
> Hi Experts,
>
>  My coauthor sent to me a *sss.fif.
> I would use it to do research.
> My questions are,
>
>  I only loaded the file into mne_browse_raw,
> but I found I can not  do average operations.
> Anyone know what additional file is needed to conduct average?
> The engineer who operates the MEG device may not use MNE toolbox, but he
> used maxfilter.
> So should I tell him which additional files I need to conduct average or
> calculation of noise covariance matrix?
> assume that he could use all the software associated with eketa MEG device
> and never use mne toolbox and that I need the files he created to conduct
> average and calculation of noise covariance matrix.
>
> Please laugh at my so simple questions :).
>
> Thank you all in advance.
> Junpeng
>
>
>
>
>
>
> _______________________________________________
> Mne_analysis mailing list
> Mne_analysis at nmr.mgh.harvard.edu
> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis
>
>
> The information in this e-mail is intended only for the person to whom it is
> addressed. If you believe this e-mail was sent to you in error and the
> e-mail
> contains patient information, please contact the Partners Compliance
> HelpLine at
> http://www.partners.org/complianceline . If the e-mail was sent to you in
> error
> but does not contain patient information, please contact the sender and
> properly
> dispose of the e-mail.
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20130403/9e8c0bac/attachment.html