# Read averaged Epochs

**URL:** <https://mne.discourse.group/t/read-averaged-epochs/1059>\
**Category:** Mailing List Archive (read-only)\
**Tags:** list-archive\
**Created:** [August 12, 2016, 11:15am UTC](https://mne.discourse.group/t/read-averaged-epochs/1059 "2016-08-12T11:15:59Z")\
**Posts on this page:** 6\
**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 12, 2016, 11:15am UTC](https://mne.discourse.group/t/read-averaged-epochs/1059/1 "2016-08-12T11:15:59Z")

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Hi,

how can I read the amplitude of my averaged Epochs?

Thanks  
Emanuela  
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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 12, 2016, 11:33am UTC](https://mne.discourse.group/t/read-averaged-epochs/1059/2 "2016-08-12T11:33:11Z")

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Hi Emanuela,

Please be more specific: what do you mean by ?amplitude?? Are you by any chance planning to do ERPology?

/Chris

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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 12, 2016, 11:57am UTC](https://mne.discourse.group/t/read-averaged-epochs/1059/3 "2016-08-12T11:57:08Z")

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Hi,

sorry for the imprecision: What I meant that I would like to have an array  
where I can read the average of epochs for each electrode in microvolts.  
So far I could just plot them by running the following: "evoked =  
epochs.average().plot()".

Cheers,  
Emanuela

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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 12, 2016, 12:06pm UTC](https://mne.discourse.group/t/read-averaged-epochs/1059/4 "2016-08-12T12:06:33Z")

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Hi Emanuela

Try "evoked.data". Its shape is (n\_electrodes, n\_samples) and will thus  
give you what you need.

Best

Lau

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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 12, 2016, 2:06pm UTC](https://mne.discourse.group/t/read-averaged-epochs/1059/5 "2016-08-12T14:06:10Z")

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many thanks! How can I know the identity of the electrode in this 2d array?

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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 12, 2016, 2:31pm UTC](https://mne.discourse.group/t/read-averaged-epochs/1059/6 "2016-08-12T14:31:35Z")

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Dear Emanuela,

You check evoked.ch\_names.

Overall, I suggest you have a look at the documentation  
[http://martinos.org/mne/stable/generated/mne.Evoked.html#mne.Evoked](http://martinos.org/mne/stable/generated/mne.Evoked.html#mne.Evoked)

Best,

Jean-Remi