# Single Trial/Epoch Questions

**URL:** <https://mne.discourse.group/t/single-trial-epoch-questions/346>\
**Category:** Mailing List Archive (read-only)\
**Tags:** list-archive\
**Created:** [August 17, 2011, 11:05pm UTC](https://mne.discourse.group/t/single-trial-epoch-questions/346 "2011-08-17T23:05:25Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\
**Post date:** [August 17, 2011, 11:05pm UTC](https://mne.discourse.group/t/single-trial-epoch-questions/346/1 "2011-08-17T23:05:25Z")

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Hello,

&nbsp;&nbsp;&nbsp;&nbsp;I am working with several hundred trials of MEG data originally sourced  
from a CTF dataset. The trials are arranged end-to-end in a CTF dataset, and  
I have converted them with mne\_ctf2fiff, using the --evoked option so that  
each will look like an individual EMF. I have also averaged all of these  
trials and created a covariance matrix, forward and inverse solutions, which  
I would now like to apply to the trials individually (i.e. to localize each  
trial's data individually). I am able to run mne\_make\_movie, selecting the  
individual trials using the --set option, but the timecourses output for my  
selected labels are comprised solely of "nan" - no data.

&nbsp;&nbsp;&nbsp;&nbsp;Also, is there any way to avoid generating a separate set of label  
output files for each trial? In my case this will be several thousand files.

&nbsp;&nbsp;&nbsp;&nbsp;Thanks for your help,

Per Lysne  
University of New Mexico/Mind Research Network  
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**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\
**Post date:** [August 22, 2011, 12:31am UTC](https://mne.discourse.group/t/single-trial-epoch-questions/346/2 "2011-08-22T00:31:03Z")

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hi,

a similar process has been previously mentioned on the mailing list.  
However not from CTF files.

Read:

[https://mail.nmr.mgh.harvard.edu/pipermail//mne\_analysis/2011-June/000644.html](https://mail.nmr.mgh.harvard.edu/pipermail//mne_analysis/2011-June/000644.html)

I also think that ricky has a matlab script that generates stc files  
for each epoch.

Hope this helps

Alex