# Combining epochs from mutliple runs
**URL:** https://mne.discourse.group/t/combining-epochs-from-mutliple-runs/612
**Category:** Mailing List Archive (read-only)
**Tags:** list-archive
**Created:** [August 27, 2013, 9:09pm UTC](https://mne.discourse.group/t/combining-epochs-from-mutliple-runs/612 "2013-08-27T21:09:49Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@system](https://mne.discourse.group/u/system)
#### Post date: [August 27, 2013, 9:09pm UTC](https://mne.discourse.group/t/combining-epochs-from-mutliple-runs/612/1 "2013-08-27T21:09:49Z")
Hi All,
Is there an easy way to combine epochs from multiple runs in mne-python?
I looked around but could not find an easy way.
Thank you,
Chiran Doshi, MS
MEG system technologist
Department of Neurology
Boston Childrens Hospital
Phone: 781-216-1136
Fax: 781-216-1172
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### Author:  [@system](https://mne.discourse.group/u/system)
#### Post date: [August 27, 2013, 9:26pm UTC](https://mne.discourse.group/t/combining-epochs-from-mutliple-runs/612/2 "2013-08-27T21:26:29Z")
hi Chiran,
there is no such thing. The recommended way is to pass a list of raw
files to Raw.
Something like
raw = mne.fiff.Raw(['raw1.fif', 'raw2.fif'], ...)
then you can build Epochs from raw the usual way.
Hope this helps
Alex
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### Author:  [@system](https://mne.discourse.group/u/system)
#### Post date: [August 27, 2013, 9:28pm UTC](https://mne.discourse.group/t/combining-epochs-from-mutliple-runs/612/3 "2013-08-27T21:28:03Z")
Dear Chiran,
you might want to use raw.append:
[http://martinos.org/mne/generated/mne.fiff.Raw.html#mne.fiff.Raw.append](http://martinos.org/mne/generated/mne.fiff.Raw.html#mne.fiff.Raw.append)
and the create regular epochs from the resulting Raw object.
HTH,
Denis
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### Author:  [@system](https://mne.discourse.group/u/system)
#### Post date: [August 27, 2013, 9:37pm UTC](https://mne.discourse.group/t/combining-epochs-from-mutliple-runs/612/4 "2013-08-27T21:37:09Z")
Hi Denis,
The problem is that I have all events in .eve files. How do you think I should combine them?
Does adding the length of appended raw file to the events sound like a good solution?
Chiran Doshi, MS
MEG system technologist
Department of Neurology
Boston Childrens Hospital
Phone: 781-216-1136
Fax: 781-216-1172
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### Author:  [@system](https://mne.discourse.group/u/system)
#### Post date: [August 27, 2013, 9:56pm UTC](https://mne.discourse.group/t/combining-epochs-from-mutliple-runs/612/5 "2013-08-27T21:56:11Z")
Consider using mne.concatenate\_events():
[http://martinos.org/mne/generated/mne.concatenate\_events.html#mne.concatenate\_events](http://martinos.org/mne/generated/mne.concatenate_events.html#mne.concatenate_events)
Eric
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### Author:  [@system](https://mne.discourse.group/u/system)
#### Post date: [August 27, 2013, 10:05pm UTC](https://mne.discourse.group/t/combining-epochs-from-mutliple-runs/612/6 "2013-08-27T22:05:25Z")
Alternatively, if your \*-eve.fif files aren't any special (in terms of
events combined / pre-computed, that is, not readable from the trigger
channels) you can always compute them on the fly:
raw = Raw(['my-raw1.fif', 'my-raw2.fif', 'my-raw3.fif'])
mne.find\_events(raw)
Cheers,
Denis