[Mne_analysis] ECG artifacts

[Siobhan O'Brien]

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Thanks Mainak,

Sorry I probably should have shown the code I was using. Below is the code I am using - I do specify the channel accordingly. I have had a play around with the different options in plot_image… and I get exactly the same graph when I remove combine = ’mean’ and have no inputs to plot_image.

ecg_epochs = mne.preprocessing.create_ecg_epochs(eeg_data, event_id=999, ch_name = 'EKG')
ecg_epochs.plot_image(combine='mean')

Is there anything else you think it could be?

Thanks for your help!
Siobhan

From: mne_analysis-bounces at nmr.mgh.harvard.edu <mne_analysis-bounces at nmr.mgh.harvard.edu> On Behalf Of Mainak Jas
Sent: Tuesday, 21 January 2020 6:19 PM
To: Discussion and support forum for the users of MNE Software <mne_analysis at nmr.mgh.harvard.edu>
Subject: Re: [Mne_analysis] ECG artifacts


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It doesn’t look like the ECG channel is being used because in the log it says:

‘combining channels using “mean”‘

You can use the ch_name argument to provide the channel or alternatively set the channel type using raw.set_channel_types

Mainak

On Tue, Jan 21, 2020 at 7:08 AM Siobhan O'Brien <sob832 at uowmail.edu.au<mailto:sob832 at uowmail.edu.au>> wrote:

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Hi All,

I am new to MNE and am having some issues with identifying ECG artifacts, I have gone through the relevant tutorials and examples, but when I run the code the ‘ecg_epochs’ image does not look how I would expect it to. I am using the mne.preprocessing.create_ecg_epochs function. Please see the image below. I have also tried the mne.preprocessing.find_ecg_events functions to no avail
[cid:image001.png at 01D5D112.31C888E0]
Can anyone please point me to what I am doing incorrectly! I have checked the ECG channel, and it has very well defined PQRS waves, so I don’t think it is an issue with that channel.

Thanks,
Siobhan O’Brien
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