[Eeglablist] Epoch Data

[Stephen Politzer-Ahles]

Hello Raju,

There are lots of ways to do this, depending on what specifically you want.
Once you load an eeg dataset, the data are in EEG.data, which is a
three-dimensional matrix (channels * samples * trials ). So for example, to
plot channel 5 of epoch 10, you could do:

channel_num = 5;
epoch = 5;
plot( EEG.times, EEG.data(channel_num,:,epoch) ); % this plots the data
EEG.data(:,:,epoch) % this just shows the data; you could e.g. write this
out to a text file or something

Of course, if you want to take advantage of EEGLAB's built-in plotting
functions to have a nice layout and stuff, this might not be sufficient in
of itself. But this is a basic way to get out data from a particular trial.

Best,
Steve




Stephen Politzer-Ahles
New York University, Abu Dhabi
Neuroscience of Language Lab
http://www.nyu.edu/projects/politzer-ahles/

On Tue, Mar 31, 2015 at 10:47 AM, seetaramaraju jampana <
seetaramaraju.jampana at gmail.com> wrote:

> Hi ,
>
>     Is there a way we can plot ERP of single epoch instead of all dataset
> epoch in the EEG data. Also can we extract the data of the single epoch
> using EEGLAB.
>
> Thanks,
> Raju
>
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