[Mne_analysis] plot epoch_image for average of selection of channels

Alexandre Gramfort alexandre.gramfort at telecom-paristech.fr
Fri May 5 07:34:10 EDT 2017
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hi,

we are currently discussing exactly this in :

https://github.com/mne-tools/mne-python/pull/4227

follow the discussion to know our progress and feel free
to give a hand.

best,
Alex



On Thu, May 4, 2017 at 8:02 PM, Sammi Chekroud <sammi.r.chekroud at gmail.com>
wrote:

> Hi all,
>
> Does anybody know how it might be possible to look at epoch images over a
> selection of channels, rather than a single channel? I'm analysing some EEG
> data and hoping to average activity across a selection of visual
> electrodes, and then look at the epoch image once it's sorted based on some
> trial info, but doesn't seem straight forward (but i'm a relatively new
> user, sorry!)
>
> order = probeEpochs.events[:,2].argsort()
> mne.viz.plot_epochs_image(probeEpochs, picks = range(53,61), colorbar =
> True, cmap = 'interactive', order = order
>
> this code will visualise the ordered epochs right, but will only do it for
> the electrodes selected individually, rather than their average!
>
> I know that mne.viz.plot_compare_evokeds will compare allow you to plot
> ERPs averaged across channels, but can't seem to find a way of doing this
> for epoch images
>
> Any advice would be hugely appreciated!
> Sammi
>
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